Step-by-step explanation:
100% - 40% - 20% = 40%.
40% of students are eighth graders.
Hence there are (40/100) * 70 = 28 eighth graders.
For f(x) = -7x + 14, evaluate f(3)
Answer:
f(3) = -7
Step-by-step explanation:
f(3) = -7(3) + 14
f(3) = -21 + 14
f(3) = -7
A survey found that 3 out of 5 students prefer hamburgers to hot dogs. What percent of students prefers hamburgers ?
Answer:
60% of students prefer hamburgers
Step-by-step explanation:
3 out of 5
3 / 5 = 0.6
0.6 × 100 = 60 %
I need help again lol <3
A music store buys instruments and then sells them for 30% more than they paid.
During a 20% off sale, the store offers a clarinet for $93.60.
How much did the store pay for the clarinet?
$93.60 x 0.2 = $18.72
$93.60 + $18.72 = $112.32 = Price before 20% discount.
$112.32 ÷ 100 x 30 = $33. 696 = Discount of 30%
$112.32 - $33.696 = $78.624 = Original Price
Therefore, the store paid $78.624 for the clarinet before the 30% markup and 20% discount.
It's just a process of working backwards.
Hope this helps :))
how do you calculate the profit
Answer:
total money - total expences = profit
Total money is the money you make, so say you made $50
Total expences is how much you paid to have that thing made, say $10
50 - 10 = 40
the profit would then be $40
Louisa states that the solution to the equation One-fourth x minus 3 = StartFraction 3 Over 8 EndFraction x + 4 is x = 56. She verifies her solution using the steps below.
Equation: One-fourth x minus 3 = StartFraction 3 Over 8 EndFraction x + 4
Step 1: One-fourth (56) minus 3 = StartFraction 3 Over 8 EndFraction (56) + 4
Step 2: 14 minus 3 = 21 + 4
Step 3: 11 = 25
Which statement most accurately describes Louisa’s error?
Louisa made an error when determining the original solution of x = 56.
Louisa made an error when substituting the solution in for x.
Louisa made an error when multiplying 56 by One-fourth and by StartFraction 3 Over 8 EndFraction.
Louisa made an error when adding or subtracting.
Answer:
Its A
Step-by-step explanation: I took the test
Answer:
A
Step-by-step explanation:
A family of four drove from San Francisco to New York. They drove the same number of miles each 6 days. How many miles did they drive each day? How can you interpret the remainder?
Answer:
Step-by-step explanation:
Approximate distance between San Francisco and New York = 2903 miles
Number of family members = 4
Approximate distance to be covered by each member per day = [tex]\frac{2903}{4}[/tex] = [tex]725\frac{3}{4}[/tex] miles
Number of days to drive = 6 days
Total distance to be covered by each member each day = [tex]\frac{2903}{4}\times \frac{1}{6}[/tex]
= [tex]\frac{2903}{24}[/tex]
= [tex]120\frac{23}{24}[/tex] miles
Therefore, each family member has to drive the car for 120 miles per day approximately.
23 miles remaining will be covered by any one of the family members on the last day.
3. In the following equation, what is the y-intercept?
y = -3x + 7
Answer:
the y intercept at this point is 7
Step-by-step explanation:
hope this helps comment if not
asap get brainliest please help me.
Answer:
3/1
Step-by-step explanation:
rise/ run or also slope formula with 2 coordinates(2,3 and 3,6) use the slope formula
Answer:
4/1
Step-by-step explanation:
45 girls tried out for the field hockey team. 20% of the girls who tried out did not make the team. How many girls did not make the team?
It lagged earlier when I first asked
Answer:
9 girls did not make the team
Step-by-step explanation:
20*45=900
900/100=9
Answer:
9 girls didn't make the team
Step-by-step explanation:
The person above did it a great way, and that is the way I use it, but if you want a method that involves fractions here it is: 20% is the same as 1/5. Since there are 45 girls total, we need to find 1/5 of 45 and you can achieve that by multiplying 45 by 1/5 and you get 45/5 which is 9. Hope this helped :) .
Haley and mia's dad said if they combined the money they've saved. He would double it.
Find equivalent expression
Answer:
I have no idea, I have been trying to figure it out
Answer plz, i will give brainliest XD
100 points ppl, lol
Answer:
A) x=9, x=-2, x=2
Step-by-step explanation:
(x-9)(x+2)(x-2)=0
x-9=0
x+2=0
x-2=0
x=9, x=-2, x=2
Answer:
im 100% sure it is Ax=9, x=-2, x=2
Step-by-step explanation:
got 100% on test please give brainliest
A rectangular block of metal is 25cm long, 11cm wide and 9cm high. The metal block is melted down and all of the metal is used to make a cube. Work out the length of each side of the new cube formed
Answer:
29.03 cm
Step-by-step explanation:
Step one:
given
A rectangular block of metal is
25cm long
11cm wide and
9cm high.
The volume of the block is
= 25*11*9
= 2475cm^3
Required
The dimension of an equivalent cube
we know that volume of cube
v=l^3
24475=l^3
cube root both sides
l= ∛24475
l= 29.03 cm
Answer:
13.5cm
Step-by-step explanation:
Tried the other answer and got it wrong and saw the right one.
A school auditorium has 300 seats. If 89 people have tickets for the school play, how many people can attend? Let p be a number of people who can attend: Help PLEASE
Answer:
300-89 would equal your equasion which would be 211
Step-by-step explanation:
But there are 2 ways to think of it becaue=se if u used the people in the school to play on the stage there are still 300 seats left or your teacher would think of it as being 300-89=211 so this word problem has 2 answers!
Got any answers? math is confusing for me
x+y=5 6x+3y=27
Answer:
X = 4
Y = 1
Step-by-step explanation:
Hope this helps. Pls give brainliest.
Hey you! Yes you! You are awesome! Can you help me?
Answer:
a = -40
Step-by-step explanation:
In order for a system of equations to have infinitely many solutions, the equations must have the same line when graphed. Knowing this, it also means that the equations equal the same thing - they're just written differently. Also, remember that a constant term is just a number with no variables.
First, I would organize the second equation into standard format just like the first one (moving the x and y terms to the left side):
[tex]6x = 16 + a -15y\\6x + 15y = 16 + a[/tex]
Then, by comparing the x and y terms in both equations, we can see that the second equation is just the first equation multiplied by 3. (Notice how 2x times 3 is 6x, and 5y times 3 is 15y.) So, we would need our constant on the left hand side to do the same, to equal -8 times 3, or -24.
Thus, we would need to find what added to 16 equals -24, and we can do this with a simple algebra equation:
[tex]a + 16 = -24\\a = -40[/tex]
Therefore, a would need to equal -40 in order for the system to have infinitely many solutions.
evaluate
Evaluate-8÷2+12×9-4×6
Answer:
Step-by-step explanation:
Use PEDMAS {Parenthesis ; Exponent ; Division ; Multiplication ; Addition; Subtraction }
8÷2 + 12*9 - 4*6 = 4 + 12*9 - 4*6 {Division}
= 4 + 108 - 24 {Multiplication}
= 112 - 24 {Additon}
= 88
Answer: 88
Step-by-step explanation:
Evaluate using PEMDAS.
P = Parenthesis; There are no parenthesis in this expression
E = Exponents; There are no exponents in this expression
M = Multiplication; 12 x 9 = 108, 4 x 6 = 24
D = Division; 8/2 = 4
A = Addition; 4 + (12 x 9) = 112
S = Subtraction; (4 + (12 x 9)) - (4 x 6)
112 - 24 = 88
Which line has an Undefined slope?
Helpp
Answer:
A
Step-by-step explanation:
how do you calculate the profit
f/5 = -8 Solve for f
Answer:
-40
Step-by-step explanation:
f/5 = -8
5 x f/5 = -8 x 5
f = -40
y = 4x
4x^2 + y = 20
Answer:
8X=4Y
Step-by-step explanation:
JUST ADD
HELP please ASAP. I am being timed, and I am very confused on these two questions, answering both questions would be really appreciated...
what of b is a solution to this equation? 6b=6
A) b=1 B)b=8
Answer:
b=1
Step-by-step explanation:
6*1=6
6*8=48
Pls HELP ASAP
by what percent will a fraction change if its numerator is decreased by 75% and the denomanator is decreased by 50%
Answer:75 percent as a fraction is 3/4 and 50 percent as a fraction is 1/2
Step-by-step explanation:
Area is often one step in solving a ____
problem.
Step-by-step explanation:
reality?????????????
Which property of equality would you use -to solve the equation math8n=16
Answer:
im not sure but i do know that the letter n would be 2
Step-by-step explanation:
If you made $300 one week and had a total of $75 worth of deductions, how much did you actually take home?
Answer:
$225
Step-by-step explanation:
Factor the polynomial by finding the greatest common factor.
-15y^7z^6 – 3y^3z^8
What is the slope of the line represented by the equation 3x+4y= 12?
A: - 4/3
B: - 3/4
C: 3/4
D: 4/3
Answer:
B: -3/4
Step-by-step explanation:
Write an equation in point slope form of the line that passes through the point -4, 5 and has the slope of one.
Answer:
y - 5 = x + 4
Step-by-step explanation:
Use point slope form, y - y1 = m(x - x1) where m is the slope and (x1, y1) is a point on the line
Plug in the given point and slope:
y - y1 = m(x - x1)
y - 5 = 1(x + 4)
Simplify:
y - 5 = x + 4
So, the point slope form of the line is y - 5 = x + 4
Mary has a brownie recipe that calls for baking the brownies at 190°C for about 25 to 30 minutes.
Her oven measures temperatures in Fahrenheit only. At what temperature in Fahrenheit should she
set her oven to bake the brownies per the recipe? Enter the number only.
Answer:
374°F
Step-by-step explanation: