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kvasek [131]
3 years ago
10

8(−9 − 5x) + 4b use x = 9 and b = −9

Mathematics
1 answer:
erma4kov [3.2K]3 years ago
7 0

Step-by-step explanation:

8(-9 - 5 × 9) + 4 × (-9)

= 8( -14 × 9) + (- 36)

= 8( -126) - 36

= -1008 - 36

= -1044

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0.2(-4–2.5b–7c). write the product
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-0.8 - 0.5b - 1.4c

Step-by-step explanation:

Take the b and the c away

Then times the 0.2 by all the numbers but don't add them

Once your done you and the b and c back to you equation

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3 0
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PLEASE ANSWER ASAP!!! FULL ANSWERS ONLY!!!!!! WILL GIVE BRAINLIEST!!!!!!!!!
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Answer:

4r + 4(r + 3) = 68

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Step-by-step explanation:

distance = rate * time

a)

4r + 4(r + 3) = 68

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2 years ago
Find the surface area of each figure?Please help
kolbaska11 [484]
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Surface area of the cube
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6(2.5 x 2.5) = 37.5m²

<em>(* Each area is 2.5 x 2.5, and there are 6 sides to the cube)</em>

--------------------------------------------------
Surface area of the rectangle prism
--------------------------------------------------
2(11 x 7) + 2(9 x 7) + 2(9 x 11) = 478m²

<em>(* The opposite side of the rectangle area is the same, therefore x2)
</em>
--------------------------------------------------
Overlapping area
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2.5 x 2.5 = 6.25m²

--------------------------------------------------
Surface area of the composite figure
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37.5 + 478 - 2(6.25) = 503m²

<em>(* The bottom of the cube and the top of the rectangle prism overlapped, so the area is overlapped twice, minus 2 times of that area)</em>

--------------------------------------------------
Answer: 503m²
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4 0
2 years ago
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