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Oksi-84 [34.3K]
2 years ago
8

(HELP ASAP PLEASE!!)

Mathematics
1 answer:
Doss [256]2 years ago
8 0

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

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Answer:

The equation of the axis of symmetry is x = 7

Step-by-step explanation:

Mathematically, we have the equation of the axis of symmetry as;

x = -b/2a

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So, the equation of the axis of symmetry will be;

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2 years ago
Please help!!!! For each sum or product, determine whether the result is a rational number or an irrational number. Then choose
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Answer:

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Step-by-step explanation:

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The average time it takes to travel from home to school is 22 ½ minutes. Depending upon weather and morning traffic, the actual
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Answer:

17 \le t \le 28

Step-by-step explanation:

Given

t = 22\frac{1}{2} --- average time

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Required

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To do this, we simply add and subtract the variation from the average time.

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