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emmasim [6.3K]
3 years ago
13

2x + 5y= 18 4x + 20y= -36 Solve and Explain first to get right gets brainliest

Mathematics
1 answer:
Jet001 [13]3 years ago
4 0

because 4x+20y=-36,so ( 4x+20y)/2=2x+10y=-18

(2x+10y)-(2x+5y)=-18-18

5y=-36

then y=-7.2

because 2x=18-5y

so x=(18-5y)/2=(18-5*(-7.2))/2=27

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What is the amount of sales tax owed on a $350 laptop computer if the tax rate is 6%
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8 0
2 years ago
Find the correct linear equation: y is the quotient of thrice a number and ten.
Anarel [89]

Answer:

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Step-by-step explanation:

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7 0
2 years ago
(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

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4 x + 3 y = $79    .......equation 1

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

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

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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

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8 0
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Answer:

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Step-by-step explanation:

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7 0
2 years ago
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melomori [17]

Answer:

<h2>10³ = 1000</h2>

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Hope it will be helpful!!!

<h2>My Pleasure!!! </h2>
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