Find the missing number. a. 3 : 24 = : 72 b. : 18 = 5 : 9 c. 6: = 36 : 36

a). 3 : 24 = 9 : 72

b). 10 : 18 = 5 : 9

c). 6 : 6 = 36 : 36

Step-by-step explanation:

a). Let the missing number is x. By replacing blank space by x

3 : 24 = x : 24

We can rewrite the equation in the fraction form.

Now we multiply this equation by 72

x = 3 × 3 = 9

So the ratio is 3 : 24 = 9 : 72

b). Let the number in blank space is y.

y : 18 = 5 : 9

In the fraction form the given expression will be

Now we multiply 18 on both the sides of the equation

y = 5×2 = 10

So the ratio will be 10 : 18 = 5 : 9

c). Let the number in blank space is z

6 : z = 36 : 36

By cross multiplication

z = 6

Therefore, the ratio will be 6 : 6 = 36 : 36

c. 6tan80

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15