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bearhunter [10]
3 years ago
8

8^2+9(12/3x2)-7 explain each of your steps

Mathematics
1 answer:
REY [17]3 years ago
6 0
8^2 + 9 * (12/3 * 2) - 7 <--- First thing that PEMDAS is Parenthesis. But oh wait there are both division and multiplication, which one comes first? Division, so you go that

8^2 + 9 * (4*2) -7 <--- Go ahead and multiply now whats still inside the parenthesis

8^2 + 9 * 8 - 7 <--- Next is the exponents, you gotta remember that 8 to the second power is not 8*2 its 8*8

64 + 9 * 8 - 7 <--- Since there isn't division, just go and multiply 9*8

64 + 72 - 7 <--- I see addition first! So add 64 + 72

136 - 7 <--- Lastly subtract

129 <--- That is your answer :) Hope this helped
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Reptile [31]
To find the total area of this figure, it would be easiest to find the area of the left part (rectangle) and then find the area of the right part (triangle), and then add the two area values together.

First, we will find the area of the rectangle, using the formula A = lw, where l is the length of the rectangle and w is the width of the rectangle.
The length of the rectangle is 13 cm and the width is 9 cm. If we substitute in these values into our equation, we get:
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Next, let’s find the area of the triangle, using the formula A=(1/2)bh, where b is the base of the triangle and h is the height.
The base of the triangle is 11 cm and the height of the triangle is 5 cm (found by subtracting 13-8 as seen in the figure). If we substitute in these values and simplify, we get:
A=1/2(11cm)(5cm)
A=1/2(55cm^2)
A=27.5 cm^2.

When we add together the area of the rectangle with the area of the triangle, we will get the total area of the figure.

117 cm^2 + 27.5 cm^2 = 144.5 cm^2
Your answer is 144.5 cm^2 or the first option.

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