Help and thanks very much

Help And Thanks Very Much

Answers

Answer 1

Answer:

ST= [-4 19 TS= [-12 -8

8 -18 ] while -25 -10 ] therefore :- multiplication of matrices is not commutative .

Step-by-step explanation:

multiplication of matrices 2x2

[ a b × [ w x

c d ] y z ]

[ a.w + b.y a.x + b.z

c.w + d.y c.x + d.z ]


Related Questions

Please help me
Thank you

Answers

Answer: 3 gallons per hour

Step-by-step explanation: 14-(3x) =5 14-5=9 9/3=3

3 gallons per hour is going to be the correct answer

A and B are vertical angles.
If m/A = (2x +29)° and m B (3x - 17)°, then find the measure of B.
=

Answers

The required measure of the angle m∠B is 121°.

Given that,
Angle A and B are two vertical equal angles.
m∠B = 3x - 17
m∠A = 2x + 29

What is simplification?

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

Here,
m∠A = m∠B
2x + 29 = 3x - 17
-x = - 46
x = 46

Now,
m∠B = 3  *46 - 17
m∠B =  138 - 17
m∠B = 121°

Thus, the required measure of the angle m∠B is 121°.

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Jessica earns $10.35/hour at her part-time job. Usually she works 24 hours a week. If she can only put aside 30% of her earnings, about how many weeks will she need to work in
order to save money for a new cell phone at $399?
Select one:
A. 3
B. 6
C. 5
D. 4

Answers

Answer:

B. 6

Step-by-step explanation:

$10.35 × 24 = 248.4 per week

248.4 × 30% = 74.52 {30% of her earnings}

$74.52 × 6 weeks = $447.12

∴ She needs to work for 6 weeks in order to save up to $399

How do you solve this??

Answers

(787+917)/(3752+3530)= x
1704/7282=x
x=0.23400165
the probablility is about 23%

Answer:

0.234

Step-by-step explanation:

The total number of people in the age range from 30-49 is 7282 (3752 + 3530 the totals at the bottom of the column.  The total number of people out of that group that have completed high school is 1704 (787 + 917 the number of people in that column that have finished high school).

[tex]\frac{1704}{7282}[/tex] = .23400164789  Rounded to the nearest thousandths place is .234

Solve.
3x+2y−z=8
2x+2z=−4
x+3y=4
Enter your answer, in the form (x,y,z), in the boxes in simplest terms.

Answers

The solution of the system of linear equations is (x, y, z) = (1, 1, - 3).

How to resolve a system of linear equations

In this problem we find a system of three linear equations with three variables, which can be resolved by several methods. In this case, we shall use the method of substitution. First, clear the variable x in the third equation:

x = 4 - 3 · y

Second, substitute x in the first two equations:

3 · (4 - 3 · y) + 2 · y - z = 8

12 - 9 · y + 2 · y - z = 8

- 7 · y - z = - 4

2 · (4 - 3 · y) + 2 · z = - 4

8 - 6 · y + 2 · z = - 4

- 6 · y + 2 · z = - 12

Third, clear z in the first equation derived in the previous step:

z = 4 - 7 · y

Fourth, substitute z in the second equation derived in the second step:

- 6 · y + 2 · (4 - 7 · y) = - 12

- 6 · y + 8 - 14 · y = - 12

- 20 · y = - 20

y = 1

Fifth, calculate y and x:

z = 4 - 7 · 1

z = - 3

x = 4 - 3 · 1

x = 1

The solution of the system of linear equations is (x, y, z) = (1, 1, - 3).

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Question 6 of 10
A triangle has two sides of lengths 4 and 7. What value could the length of
the third side be? Check all that apply.
DA7
B. 17
C. 9
D. 3
E 11
F. 5

Answers

all that sides which can be applicable in the given side of triangle are:

F.5

A.7

C.9

WHICH THEOREM IS APPLICABLE FOR FINDING THE THIRD SIDE OF TRIANGLE ?

Third Side of a Right Angle Triangle Pythagorean Theorem. The length of the hypotenuse in a right triangle can be determined using the Pythagorean Theorem. You can determine the length of the missing side using algebra and square roots as long as you are only given two lengths.

CALCULATION

a,b and c are the sides of a triangle if it satisfies:

a<b+c  , b<a+c and c<b+a

Here, a=4 and b=7

We have to find c

i.e. all those c which satisfies:

4<7+c , 7<4+c and c<4+7=11

D.3   it is not true since it doesn't satisfies second inequality

F.5   it is true

A.7   it is true

C.9   it is true

E.11   This is clearly false, since it doesn't satisfies inequality third

F.5 This is clearly false, since it doesn't satisfies inequality third

Hence, correct options are:

F.5

A.7

C.9

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Gabby worked 30 hours in 4 days. Determine the rate for ratio of the two different quantities.

30/34 hours per day

4/30 hours per day

30/4 hours per day

4/34 hours per day

Answers

The required rate for ratio of the two different quantities i.e

Gabby worked 30/4 hours per day.

Option (c) is correct.

What is arithmetic?

Arithmetic is the branch of mathematics that deals with the study of numbers using various operations on them. Basic operations of math are addition, subtraction, multiplication and division. These operations are denoted by the given symbols.

Given:

Gabby worked 30 hours in 4 days.

According to given question we have

The ratio of the two quantities of the different kind and in the different units is a fraction that shows how many times one quantity is of the other.

By the use of arithmetic we have,

Gabby worked 30 hours in 4 days means

4 days= 30 hours

1 days = 30/4 hours

Therefore, the required rate for ratio of the two different quantities i.e

Gabby worked 30/4 hours per day.

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Answer: 30/4 hours per day

Step-by-step explanation:

3)
Chicken cost $7.19 per pound. You buy 0.82 pounds at the supermarket.
How much did you spend?

Answers

Answer:

$5.90

Step-by-step explanation:

(7.19)(.82)  Put these numbers in your calculator and multiply them together.

5.8958 Round to the nearest cent

$5.90

Solve the inequality and express your answer in interval notation. x^2-12x+3<0

Answers

Solution:

B.) [tex](6-\sqrt{33}, 6+\sqrt{33})[/tex]

Hope this helps! If so, please lmk! Thanks and good luck!

219 +485 = 348 + please

Answers

Answer: please=356

Step-by-step explanation:

219 +485 = 348 + please

704=348 + please

please=356

Michael Wittry has been investing in his Roth IRA retirement account for 21 years. Two years ago, his account was worth $215,613. After losing 13 of its original value, it then gained 12 of its new value back. What is the current value of his Roth IRA

Answers

If two years ago, his account was worth $215,613. After losing 13 of its original value, it then gained 12 of its new value back. The current value of his Roth IRA is: $215,613.

Current value

First step is to calculate the value loss

Value loss=1/3× original  value

Value loss= 1/3× $215,613

Value loss= $71,871

Second step is to calculate the new value

New value=$215,613-$71,871

New value= $143,742

Third step is to calculate the value gained

Value gained= 1/2× new value

Valued gained=1/2× $143,742

Valued gained=$71,871

Fourth step is to calculate the current value

Current value= $143,742+$71,871

Current value=$$215,613


Therefore If two years ago, his account was worth $215,613. After losing 13 of its original value, it then gained 12 of its new value back. The current value of his Roth IRA is: $215,613.

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Please help
Find the equation of the line then write it in the form y=mx+b
Y= ?

Answers

Answer:

y=1/5x

y=0

Step-by-step explanation:

Rochelle needs to pack a picture frame that measures 7611 inches on each side. Will it fit into a box that measures 7.52 inches on each side? Explain.

Answers

No, the picture frame will not fit into a box that measures 7.5 inches on each side because the side of the frame will be greater than it that is 7.54 inches.

Length of picture frame is given as:

= 7 (6 / 11)

= 7.54 inches

The length of Box is given as = 7.5 inches

From the above, we can see that the length of the box is smaller than the length of the picture frame.

So, the picture frame will not be able to fit in the box.

Therefore, we get that, the picture frame will not be able to fit into a box that measures 7.5 inches on each side because the side of the frame will be greater than it that is 7.54 inches.

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Your question was incomplete. Please refer the content below:

Rochelle needs to pack a picture frame that measures 7 6/11 (fraction 6 over 11) inches

on each side. Will it fit into a box that measures 7.5 inches on each

side?

Assistant Manager Clyde works as a part-time assistant manager for the Barkley Coffeehouse to earn money to help pay for his college expenses. He makes $11.50 per hour. The coffeehouse sells whole bean coffee, mugs, and other coffee products. Clyde earns $0.50 for each of these items he sells. Last week he worked 30 hours and earned $364. How many coffee products did he sell last week?

Answers

The number of coffee product he sells is 38.

How to find the number of coffee products he sells?

He makes $11.50 per hour.

He earns $0.50 for each of these items he sells.

Last week he worked 30 hours and earned $364.

Therefore, the number of coffee product he sells last week can be calculated as follows:

let

x = number of coffee product he sells.

364 = 11.50(30) + 0.50(x)

364 = 345 + 0.50x

364 - 345 = 0.50x

19 = 0.5x

divide both sides by 0.5

x = 19 / 0.5

x = 38

Therefore, the number of coffee product he sells is 38.

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given z (x)=15x-x^2+3

Answers

Answer:

○ [tex]z(x - 1) = -x^2 + 17x - 13[/tex]

Step-by-step explanation:

We are told that:

[tex]z(x)= 15x - x^2 + 3[/tex],

and told to find an expression for [tex]z(x - 1)[/tex].

In order to find [tex]z(x - 1)[/tex], we have to replace [tex]x[/tex] in the definition of [tex]z(x)[/tex] with [tex](x-1)[/tex]:

[tex]z(x - 1) = 15(x -1) - (x - 1)^2 + 3[/tex]

Now we can simplify:

⇒ [tex]z(x-1) = 15x - 15 - (x - 1)^2 + 3[/tex]      [Distributing 15 into the first brakets]

⇒ [tex]z(x-1) = 15x - 15 - (x^2 - 2x + 1) + 3[/tex]

⇒ [tex]z(x-1) = 15x - 15 - x^2 + 2x - 1 + 3[/tex]     [Distributing the minus sign]

⇒ [tex]z(x - 1) = 17x - x^2 -13[/tex]          [Combining like terms]

⇒ [tex]z(x - 1) = -x^2 + 17x - 13[/tex]

Therefore, the first option is the correct one.

Cosx-1=0[tex]Cos(x)-1=0[/tex]

Answers

The solution of the given trigonometric form equation as required in the complete task content is; x = nπ where n is any real number integer value.

What is the solution of the given trigonometric equation as in the task content?

It follows from the task content that the solution to the given trigonometric equation is to be determined.

Given;

Cos(x) - 1 = 0

Add 1 to both sides of the equation;

Cos (x) = 1

Therefore, the value of x can be determined by evaluating the cos inverse of (-1).

Hence,

x = Cos-¹(1)

x = nπ (where n is any integer real number value).

Ultimately, the solution of the given trigonometric form equation as required in the complete task content is; x = nπ where n is any real number integer value.

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Taylor is curious to know how different types of music will impact how long it takes someone to finish their homework. She gathers a group of 12 year olds and breaks them into groups of 3. The first group listens to nothing. The 2nd group listens to classical, the 3rd listens to pop music, and the 4th listens to heavy metal. Each group needs to read 20 pages of the same book and answer the same set of 20 math questions. She times each group and compares.

a) Find the Independent Variable
b) Find the dependent variable
c) Find the Control Group
d) Find the experimental group
e) Find 3 constants

Answers

The answer should be C

All flowers need water
Some trees need water
Some flowers are trees
Valud or Invalid

Answers

Valid I’m pretty sure hope that helps

valid . some trees grow flowers i belive

Find the population mean or sample mean as indicated. 17, 10, 3, 5, 25

Answers

12 is the population mean or sample mean of given data.

Given that

The collected data

17, 10, 3, 5, 25

To find

The population mean or sample mean

So, according to the question

we have,

The collected data

 17, 10, 3, 5, 25

For calculate the the population mean or sample mean, We have to find out the total of data, and total number of data.

Total of data = 17+ 10 +3 + 5+ 25

Total of data = 60

Total number of data (n) = 5,

So, we know that

Sample mean = [tex]\frac{total\;of\;data}{n\;number\;of\;data}[/tex]

Now, putting the all values,

We will get,

Sample mean =  60/5  

 = 12          

The Sample mean of given data is 12.

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PLEASE HELP! Triangle BCD has the following side lengths: BC = 60, CD = 50

Triangle RST has the following side lengths: RS = 11x-4, ST = 70

What is the value of x? (put just the number in the first box)
What is the length of side RS? (put just the number in the second box)

Answers

The value of x is 11 units and the length of side RS = 11x-4 is 117 units.

with measurement BC = 60, CD = 50.

Triangle RST : RS = 11x-4, ST = 70

What is similarity?

Two figures are said to be similar if they are the same shape. In more mathematical language, two figures are similar if their corresponding angles are congruent , and the ratios of the lengths of their corresponding sides are equal.

Given:

BC = 60 and CD = 50

RS = 11x - 4 and ST = 70

Now, considering

BC : CD = RS : ST

60 : 50 = 11x - 4 : 70

60/50 = (11x - 4)/70

50 * (11x - 4) = 70 * 60

11x - 4 = 84

11x = 88

x = 11

So, RS = 11x - 4

RS = 11 x 11 - 4

RS = 117

Hence, the value of x is 11 and the length of side RS is 117

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Two boy scouts were selling popcorn for a fundraiser at a local grocery store and made $640. They sold twice the amount of kettle corn as butter popcorn, and 6 more bags of cheddar popcorn than kettle corn. If kettle corn cost $15 a bag, butter popcorn cost $8 per bag, and cheddar popcorn cost $10 per bag, how much of each type of popcorn did they sell? Write an equation to solve the problem.

Answers

They sold 10 bags of butter popcorn, 20 bags of kettle corn and 26 bags of cheddar cheese.

Here, we are given that two boy scouts were selling popcorn for a fundraiser.

Their total revenue = $640

Let the bags of butter popcorn be x

then, the bags of kettle corn sold = 2x

and the bags of cheddar popcorn sold = 2x + 6

Cost of kettle corn = $15/ bag

Cost of butter popcorn = $8/ bag

Cost of cheddar popcorn = $10/ bag

Thus, the total revenue from from kettle corn = $30x

total revenue from from butter popcorn = $8x

total revenue from from cheddar popcorn = $10(2x + 6)x

Thus, we will get the following equation-

30x + 8x + 10(2x + 6) = 640

38x + 20x + 60 = 640

58x + 60 = 640

58x = 580

x = 580/ 58

x = 10

Thus, 2x = 20 and 2x + 6 = 26

Hence, they sold 10 bags of butter popcorn, 20 bags of kettle corn and 26 bags of cheddar cheese.

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What are the coordinates of point A?

Answers

Answer:

It's coordinates are (1,-2)

Can someone please explain this to me? Thank youuu:)

Answers

Answer:

B: 3x+(4x+2)=180

Step-by-step explanation:

Supplementary angles are those angles that sum up to 180 degrees. The question gives you the two angles that compose the 180 degree angle thus you get the equation:

Angle 1 + Angle 2 = Supplementary Angle

In this case we see that these two angles are Angles B and C and a supplementary angle is 180 degrees thus:

(4x+2)+3x = 180

Furthermore this also allows you to find x.

how many unique straight lines in parallelogram

Answers

Answer:

4 lines

Step-by-step explanation:

We know that a parallelogram is constructed using two parallel lines intersecting other pairs of parallel lines so basically we require 4 lines to construct a parallelogram.

Answer:4

Step-by-step explanation:

E= 1R solve for R pls help me I don’t understand

Answers

Answer:

r = e or 2.718282

Step-by-step explanation:

a) simplify both sides of the equation

2.718282 = r

b) flip the equation

r = 2.718282

1. The last time Jerry took a math quiz he got a score of 1.5 (out of 4) because he didn't study.
When he retook the quiz a week later he got a score of 4. By what percent did his score
increase by?

Answers

Answer:

6 is my final answer

Step-by-step explanation:

set as brainliest

Georgia has 17 songs in her playlist, while Scarlet has 36 songs in her playlist. Which statement correctly compares the number
of songs in the two playlists?
O 17 < 36
O 17 > 36
O 17 = 36
36 < 17

Answers

The statement that correctly compares the number of songs on Georgia and Scarlet's playlists are is  17 < 36.

How to know the correct statement?

Georgia has 17 songs on her playlist while Scarlet has 36 songs on her playlist.

In the number line, the number 36 comes after the number 17. This means that 36 is greater than 17.

The statement that therefore correctly compares the number of songs in the playlist is:

17 < 36

In conclusion, the statement that correctly compares the songs in the two playlists is 17 < 36.

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What is a two step problem with variables on each side equal 19? (Please help)

Answers

The equation of the two-step problem is 2x = x + 19

How to determine the two-step problem?

The conditions are given as

Variable on both sidesSolution = 19

Let the variable in the equation be x

So, a possible equation is as follows

2x = x + 19

The solution to the equation is as follows

2x = x + 19

Subtract x from both sides

x = 19

Hence, the equation of the two-step problem is 2x = x + 19

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Multiple choice: Which of the following steps below would be a good first step when solving the equation 2x+5=11

Divide both sides by 2
Add 5 to both sides of the equation
Subtract 5 from both sides of the equation
Add 11 to both sides of the equation

Answers

Answer:

easy

Step-by-step explanation:

How to solve a system of equations by elimination.

Write both equations in standard form.

Make the coefficients of one variable opposites.

Add the equations resulting from Step 2 to eliminate one variable.

Solve for the remaining variable.

Substitute the solution from Step 4 into one of the original equations.

The terminal side of an angle theta in standard position passes through the point ​-6(-4​,​). Use the figure to find the following value. r

Answers

Answer is - 2 [tex]\sqrt{3}[/tex] / 13

Cosecant Given a point P(x, y) on the terminal side of an angle θ in standard position

cosθ = cos (π + d) (d is the inner angle of the tringle)

       = - cos 2

       = - 4 / - [tex]\sqrt{(- 6^{2} + (- 4^{2} )[/tex]

       = - 4 / - [tex]\sqrt{36 + 16 }[/tex]

      = - 4 / -[tex]\sqrt{52}[/tex]

      = - 4 / 2[tex]\sqrt{13}[/tex]

      = - 2 / [tex]\sqrt{13}[/tex]

multiply by [tex]\sqrt{13}[/tex]

we get,

      = -  [tex]\frac{2 \sqrt{13} }{13}[/tex]

Formulae :

Arc cosecant      y = arcs(x) = csc-1(x). Another way to write x = csc(y).

Arccosine      y = arcos(x) = cos-1(x). Another way to write x = cos(y).

Arc cotangent    y = arcos(x) = cot-1(x). Another way to write x = cot(y).

Arc secant       y = arcsec(x) = sec-1(x). Another way to write x = sec(y).

Arcsine       y = arcsine(x) = sin-1(x). Another way to write x = sin(y).

Arctangent   y = arctan(x) = tan-1(x). Another way to write x = tan(y).

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