The new perimeter will be 3 times the old perimeter.

Original perimeter:
2(8+7) = 2(15) = 30 yds

New perimeter once they are tripled:
3 x 8 = 24
3 x 7 = 21
2(24+21) = 2(45) = 90 yds

30 x 3 = 90

4 0

2 years ago

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An engineering student answered 81 questons correctly ona 90 question test. What percent of the question did she answer correctl

SIZIF [17.4K]

Answer:

correct answer = 90%

Step-by-step explanation:

Let x be the percent of the question did she answer correctly.

Given:

An engineering student answered 81 questions correctly on a 90 question test.

Find the percent of the question did she answer correctly.

Solution:

Percentage formula is given below

% answer $=\frac{correct\ answer}{total\ questions}\times 100$

% answer $=\frac{81}{90}\times 100$

% answer $=\frac{81\times 100}{90}$

% answer $=\frac{81\times 10}{9}$

% answer $=9\times 10$

% answer $=90$

correct answer = 90%

Therefore, she answered 90% correctly.

4 0

3 years ago

Represent the proportional relationship described with an equation where i equals ice cubes and t equals glasses of tea:

Otrada [13]

B i think, good luck doe.

7 0

4 years ago

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