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Llana [10]
4 years ago
7

Help me I need the area of the three shapes

Mathematics
1 answer:
Svet_ta [14]4 years ago
3 0

8 times 8 is 64 plus

8 times 8 divided by 2 is 32

Add then find the circle part.

Its 58.

Add all numbers together 158.

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Evaluate 3a - 2b when a = -4 and b = -1
dimaraw [331]
It would be -12 - (-2) = -10
4 0
3 years ago
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Please try to help me I'm almost done with my class lol :)<br> *30 points*
inna [77]
Answer
C= 15cm
R= C
——
2 3.14
R= 15cm
———
2 3.14
5 0
3 years ago
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Does anyone know how to find the surface area of this triangular prism?
OverLord2011 [107]
Well, check the picture below, that's a triangular prism

so.. if you notice, is really just 2 triangles and 3 rectangles stacked up to each other at the edges

so.. if you just find the area of the 3 rectangles, and the two triangles, sum all five areas up, and you're golden

in your picture, notice the tickmarks, that triangle has all sides equal to each other, so.. if one is 6 units, so are the other sides as well

now.. to get the area of a triangle is 1/2bh as you'd know... so.. what the dickens is the "h" or height of the triangle anyway, well \bf \textit{height of an equilateral triangle}\\\\&#10;h=\cfrac{s\sqrt{3}}{2}\qquad s=\textit{length of one side}

that's the altitude or height, you already know the base, notice the tickmark

so, get the area of those 2 triangles, and the 3 rectangles and sum them up, and that's the surface area of the triangular prism

3 0
4 years ago
If QRST is a rectangle with QT=50 and RS=4x+8, find x
Alenkinab [10]
<span>If QRST is a rectangle with QT = 50 and RS = 4x + 8, find x. 
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QT = RS (opposite sides of a rectangle are equal)

50 = 4x + 8
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4 0
4 years ago
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(−10x^2+9)+(8x^2 −5x+7)
Leno4ka [110]

Answer:

-2x^2-5x+16

Step-by-step explanation:

Remove parenthesis:

-10x^2+9+8x^2-5x+7

Combine like terms:

-10x^2+8x^2-5x+9+7

= -2x^2-5x+9+7

=-2x^2-5x+16

8 0
3 years ago
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