Question

Please answer this.....​

Answer 1

Explanation:

10)a) Let the number = x

4x + 8 = 16

Subtract 8 form both sides

4x + 8 - 8 = 16 - 8

4x = 8

Divide both sides by 4

4x/4 = 8/4

x = 2

The number is 2

b) Let the number = x

4x - 8 = 6

Add 8 to both sides

4x - 8 + 8 = 6 + 8

4x = 14

Divide both sides by 4

4x/4 = 14/4

x = 3.5

The number is 3.5

11) a) Increase in cost = 105 - 100 = $ 5

b) Percentage increase =
`(5)/(100)*100`

= 5%

12) Number of girls = 35

Number of girls wearing glasses = 15

Number of boys = 40

Number of boys wearing glasses = 10

a) Percentage of boys wearing glasses =
`(10)/(40)*100\\`

= 25%

b) Percentage of girls wearing glasses =
`(15)/(35)*100`

= 42.86%

c) Total children = 35 +40 = 75

Total children wearing glasses = 15 + 10 = 25

Percentage of children wearing glasses =
`(25)/(75)*100`

= 33.33%