MATHEMATICS MIDDLE SCHOOL

Sue bought 7 cans of tennis balls. There are 3 balls in each can. How many balls did Sue buy?

Answers

Answer 1
Answer:

Answer:

Sue buy 21 balls.
Answer 2
Answer:

Answer:

21

Step-by-step explanation:

7 cans times 3 balls each equals 21 balls

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A camera manufacturer spends $1,800 each day for overhead expenses plus $9 per camera for labor and materials. The cameras sell for $18each. a. How many cameras must the company sell in one day to equal its daily costs? b. If the manufacturer can increase production by 50cameras per day, what would their daily profit be?
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Describe the ratio of gray tiles to white tiles in 3 different ways

A game at a county fair has a spinning drum holding 15 colored plastic balls: some white, some green, and some red. Every time the drum spins, one ball drops out, its color is recorded, and then the ball is placed back in the drum. The table shows the results after 15, 150, and 1500 spins.What is the best estimate of the number of white balls in the drum?

Outcome Number of trials
15 150 1500
white 5 61 680
green 9 74 713
red 1 15 107




A.
1

B.
4

C.
6

D.
7

Answers

i would say c

lets REALLY hope that helps
i also say that the answer is c

How can I solve this system of linear equation by substitution 3x+y=11 and -2x+y=1

Answers

We can answer this question by solving each equation for one variable, and then substituting.

3x + y = 11   Given
y = -3x + 11   Subtract 3x from both sides

This equation is now solved for y. Now, let's do the other equation. Make sure to solve it for the same variable.

-2x + y = 1   Given
y = 2x + 1   Add 2x to both sides

Now, let's set both equations equal to each other, since they both equal y.

2x + 1 = -3x + 11   Set both equations equal to each other
1 = -5x + 11   Subtract 2x from both sides
-10 = -5x   Subtract 11 from both sides
2 = x   Divide both sides by -5

Now, let's substitute x in for one of the equations we found earlier, so that we can find y.

y = 2x + 1   Given
y = (2)(2) + 1   Substitute the x-value, 2
y = 4 + 1   Multiply
y = 5   Add

So, x = 2 and y = 5.

Hope this helps!
First will make Equation take on the form of y = mx + b. I've cchosen the second Equation:

y = 2x + 1


Now substitute this equation in for y into the other equation and solve:

3x+y = 11
3x+ (2x + 1)=11
5x + 1 = 11
5x = 11 - 1
5x/5= 10/5
x = 2 


You can now plug this x-value back into either equation, and solve for y:

y = 2(x) + 1
y = 2(2) + 1
y = 5

Simplify 3p^2q+3p(2pq-4)+5p^3

Answers

distribute
a(b+c)=ab+ac
3p(3pq-4)=9p^2q-12p

we have

3p^2q+9p^2q-12p+5p^3
add like terms
4p^3+12p^2q-12p
Step by Step
3p^2q+3p(2pq−4)+5p^3

Distribute:

=3p^2q+(3p)(2pq)+(3p)(−4)+5p^3=3p2q+6p2q+−12p+5p3

Combine Like Terms:

=3p^2q+6p^2q+−12p+5p^3=(5p^3)+(3p^2q+6p^2q)+(−12p)=5p^3+9p^2q+−12p
=5p^3+9p^2q−12p

What value of z makes the equation true? 7/8=z/32 Answers: A. 7 B. 8 C. 14 D. 28

Answers

This is something you call "Proportions" or two ratios equal to each other.

(7)/(8)= (z)/(32)

Multiply 32 and 7.

(224)/(8) = z

The answer is z = (224)/(8) or 28
7/8 of 32 is 28. Z is therefore d.) 28

I need some help thank you

Answers

Answer:

9/10

Decimal: 0.9
0.9 in decimal form

Is it possible for a trapezoid to have 3 right angles

Answers


No, because if a trapezoid were to have three right angles, the fourth angle would also be right, because the angles of a quadrilateral add up to 360, and a quadrilateral with four right angles is a rectangle, which has two sets of parallel sides instead of one set like a trapezoid does.
No, this is because if a trapezoid has 3 right angles, the fourth and last one would also have to be a right angle and it is supposed to be an acute angle. To make it less confusing, a right angle is is in the shape of a "L" and if it had three "L's" it would have to have another one too which would then make it a rectangle. I hope I helped!!
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