EXERCISE 8.4
1. Convert the following ratios into percentages.
(a) 35 : 16
(b) 4:5

(a)  218.75 %

(b)  80 %

Step-by-step explanation:

Part (a)   35 : 16

35 over 16 is:    which in percent form is 218.75 %

Part (b)    4 : 5

4 over 5  is:    which in percent form is 80 %

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!