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2 years ago

I NEED HELP PLEASE, THANKS.

Mathematics

1 answer:

saveliy_v [14]2 years ago

6 0

Answer:

B. $33.7 mm; 54mm^2$

Step-by-step explanation:

To find the perimeter, use the formula:

P = a + b + c

P = 12 + 12 + 9.7

P = 33.7

To find area, use the formula:

A = $\frac{1}{2} bh$

A = $\frac{1}{2} (12)(9)$

A = $\frac{1}{2} (108)$

A = 54

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2 years ago

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irina1246 [14]

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2 years ago

Write an equivalent expression d+d+d+e+e+e? please help

pantera1 [17]

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2 years ago

Lin solved the equation 8(x-3)+7=2x(4-17) incorrectly. Find the errors in her solution. What should her answer have been?

Irina-Kira [14]

Answer: The correr solution is $x=\frac{17}{34}$

Step-by-step explanation:

Since the steps in Lin's solution are not shown, we are not able to find her erros. However, we can solve it step by step and find the correct result:

$8(x-3)+7=2x(4-17)$

Firstly, in the left part of the equation we have to multiply $8$ by the numbers inside the parenthesis; and in the right side we have to solve first what is inside the parenthesis:

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Adding similar terms in the left side and multiplying $2x$ by the number inside the parenthesis in the right side:

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Isolating $x$ :

$x=\frac{17}{34}$ This is the correct solution

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3 years ago