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3 years ago

I need help please help me im struggling please show WORK and tell me how to do it NO links please.

Mathematics

1 answer:

stellarik [79]3 years ago

3 0

Answer:

- 7y +3 =-25

-7y=-25—3

-7y=-28

-7y÷-7= -28÷-7

y=4

Step-by-step explanation:

Take +3 to the side so that your variable and a constant is on their own sides. When a number goes over the equals sign the sign changes at becomes the inverse that's why l said - 3. You now calculate - 25—3 equals 28 then divide by 7 to find y and your y is 4.

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The formula for the perimeter of a rectangle is p=2l 2w.

IRINA_888 [86]

I think the answer is c i’m not sure

5 0

3 years ago

17. If a triangle has a height of 12 inches and a base of 5 inches, what's its area? A. 45 sq. in. B. 30 sq. in. C. 90 sq. in. D

Ipatiy [6.2K]

Hello!

The formula for a triangle is seen below.

A=0.5bh

You only need the base and height measurements to calculate the area. We have a height of 12 and a base of 5.

A=0.5(5·12)
A=0.5(60)
A=30

Our answer is B. 30.

I hope this helps!

6 0

4 years ago

Read 2 more answers

A triangular table top has a base that is twice as long as its height. If the area of the table surface is 324 square inches, wh

kenny6666 [7]

Answer:

Height is 18 inches.

Base is 36 inches.

Step-by-step explanation:

Let the base of the triangular table top be x inches.

The height will be $\frac{1}{2}$ x inches.

The area of the triangular table top is 324 inches²

Area of a triangle = $\frac{1}{2}$ × Base × Height

342 inches² = $\frac{1}{2}$ × x × $\frac{1}{2}$ x

$\frac{x^2}{4}$ = 324

Finding the square root on both sides gives;

$\frac{x}{2}$ = 18

Therefore x (the base) = 36 inches

And $\frac{1}{2}$ (the height) = 18 inches.

6 0

3 years ago

Please help i will give brainliest

kykrilka [37]

Answer:

1 5/12

Step-by-step explanation:

You can do the opposite of this problem to get the answer. 2/3 + 3/4 = 1 5/12. You can confirm this answer by doing 1 5/12 - 3/4. Therefore, 1 5/12 is your answer.

8 0

2 years ago

Which expression could be substituted for y in the second equation to find the value of x?

EastWind [94]

value of x is $x=-\frac{29}{4}$ and value of y is $y=-\frac{9}{2}$