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vampirchik [111]
3 years ago
7

Consider the system of equations.

Mathematics
2 answers:
lidiya [134]3 years ago
5 0

Answer:

A. (4, -4)

Step-by-step explanation:

Equation form x = 4, y = −4

Yuri [45]3 years ago
5 0

Answer:

Option A

Step-by-step explanation:

5x + 2 y = 12 -----------(I)

5x - 2y = 28 ------------(II)

Add equation (I) & (II). So, y will be eliminated and we will get the value of x

(I)     5x + 2y = 12

(II)     <u>5x -2y  = 28  </u>  {Now add}

         10x      =  40

                  x = 40/10

x = 4

Plugin x = 4 in equation (I)

5*4 + 2y = 12

20 + 2y = 12

        2y = 12 - 20

        2y = -8

          y = -8/2

y = -4

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1. A store manager marked up the price of a $12 clock by 20%. What is the new price of the clock?
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Answer:

1) new price of the clock is $14.4

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1. A store manager marked up the price of a $12 clock by 20%. What is the new price of the clock?

Price of Clock = $12

Mark up = 20%

We need to find new price of clock.

The price of  clock can be found by finding 20% of 12 and then adding that amount in original price.

So, finding 20% of 12

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2. On a math quiz, Kyra answered 7 of 10 questions correctly. Express her quiz score as a percent.

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So, Kyra scored 70% marks

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