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Nataliya [291]
3 years ago
8

Write an inequality 3 times a number x, subtracted from 18 is less than −90.

Mathematics
1 answer:
fenix001 [56]3 years ago
4 0
3x-18 < -90. is the inequality
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The table shows information about the number of sweatshirts sold and money collected at a fundraiser for school athletic program
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miranda went to the music store to purchase some items. the sales tax was 5 percent per item. if she bought a dvd for $19, how m
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$19/1.05= $18.095 rounds to $18.10
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3 years ago
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3 years ago
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(HELP ASAP PLEASE!!)
Doss [256]

Answer:

Each shirt cost $<u>7</u>  and each pair of shorts cost $<u>17</u> .

Step-by-step explanation:

let shirts be represented as x

let shorts be represented as y

Younger brother spent $79 on 4 new shirts and 3 pairs of shorts.

4 x + 3 y = $79    .......equation 1

Older brother purchased 7 new shirts and 8 pairs of shorts and paid a total of $185.

7 x + 8 y = $185  .......equation 2

multiply equation 1 by 7 and equation 2 by -4 and add both equations to get the value of y.

7 × (4 x + 3 y = $79)     ⇒             +28 x + 21 y = $553

-4 × (7 x + 8 y = $185)  ⇒             <u> -28 x - 32 y = - $740</u>

                                                          0   - 11 y   = - $187     ⇒  -11 y   = - $187

y = \frac{- $187}{- 11}   ⇒   y = $17

shorts = y = $17

put value of y in equation 1

4 x + 3 ( $17 ) = $79  ⇒    4x + $51 = $79   ⇒   4x = $79 - $51

4x = $28   ⇒  x = \frac{$28}{4}   ⇒   x = $7

Shirts = x = $7

8 0
3 years ago
2x^3+3x^2-30x+7/x-3 divide
slava [35]
<span>2x^3+3x^2-30x+7/x-3 divide</span>

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