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Fantom [35]
3 years ago
5

I need help!!! Please help ASAP!

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
8 0

180 ≥ 45 + 15x

<u> -45</u>   <u>-45        </u>

135 ≥         15x

  9 ≥  x

   x ≤ 9

Answer: D

66 < 2x + 28

<u>-28 </u>  <u>        -28 </u>

38 <  2x

 19 <  x

  x > 19

Answer: C  <em>the answer could also be B</em>

11 < 5 + 2x

<u>-5</u>  <u>-5         </u>

6 <       2x

3  <  x

x > 3

Answer: E   <em>the answer could also be A, B, and C</em>

-30 ≥ 6 - 4x

<u>  -6</u>   <u> -6      </u>

-36 ≥    -4x

  9 ≤ x

   x ≥ 9

Answer: A

\frac{x}{12} - 4 ≥ 5

<u>       + 4 </u>  <u>+ 4 </u>

\frac{x}{12}    ≥ 9

12(\frac{x}{12}) ≥ 12(9)

 x   ≥ 108

Answer: B

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I marked all 3 parts. I need to know part C (the shaded part). anybody mind helping?​
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Answer:

Area of shaded part ABCEF = 66 sq.cm

Step-by-step explanation:

AB = 8cm

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Let DE = x cm

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Area of triangle ADE = 1/2 * base * height

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                                    = 1/2 * 2 * 11 = 11 sq. cm

Area of triangle AEF = Area of triangle ADE = 11 sq. cm

Area of Rectangle ABCD =  l * b = 8 * 11 = 88 sq.cm

Area of shaded part ABCEF =  Area of Rectangle ABCD - (Area of triangle AEF + Area of triangle ADE)

    = 88 - ( 11 + 11 )  = 88 -22 = 66 sq.cm

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