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dsp73
3 years ago
12

I NEED HELP WITH THIS QUESTION PLEASE

Mathematics
1 answer:
Y_Kistochka [10]3 years ago
4 0

Step-by-step explanation:

it says f(-4).

so, x = -4.

into what function segment is this "falling" ?

well, into the x < 3 segment, right ? because -4 < 3.

so, we need to use

f(x) = x² - 5

f(-4) = (-4)² - 5 = 16 - 5 = 11

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USA test prep question:What is 2 2/3 ÷ 2/3
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Answer: D) 4

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3. Simplify

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4 years ago
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3 years ago
Help please don't get it
GarryVolchara [31]

Surface Area is the area of each face added together. For this question lets find the area of one triangle first.

Area of a triangle is base*hight/2, so 6*7/2=21. That was the area of one triangle. We have 4 traingle so we multiply that by for. 21*4=84.

Now, lets find the area of the squre. area of square is side*side or side^2.

So we multiply 6*6=36. that is the area of the square.

To find the surface area, we must add Area of Triangles+Area of Square.

so, 84+36=120

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