Question

Plz help me its for my hw

Answer 1

Answer:

Step-by-step explanation:

Let the number  = n

$\dfrac{n*5}{8}=10$

Multiply both sides by 8

$8*\dfrac{5n}{8}=10*8$

5n = 80

Divide both sides by 5

n = 80/5

n = 16

The number is 16

2) John's age = x

Ahmad age = x + 3

x + x + 3 = = 63

Combine like terms

2x + 3 = 63

Subtract 3 from both sides

2x = 63-3

2x = 60

Divide both sides by 2

x = 60/2

x = 30

John's age = 30

Ahmad age = 33

3)  Bobby's age = x

Ahmad's age = 2x

John's age = 2x - 7

x + 2x + 2x - 7 = 38

5x - 7 = 38

5x = 38 + 7

5x = 45

x = 45/5

x = 9

Bobby's age = x  = 9 years

Ahmad's age = 2x = 2*9 = 18 years

John's age = 2x - 7 =  18 - 7 = 11 years

4) Perimeter = 42

x + 5 + x - 2 +x + 5 + x - 2 = 42

x + x +x +x + 5 - 2 + 5 - 2 = 42

4x  + 6 = 42

4x = 42 - 6

4x = 36

x = 36/4

x = 9

Length = 9 +5 = 14

Width = 9 - 2 = 7

5) a) Perimeter of garden = p + 3p + 2 + p + 3p + 2

= p + 3p + p +3p + 2 + 2

= 8p + 4

b) 8p + 4 = 76

c) 8p = 76 - 4

8p = 72

p = 72/8

p = 9