A gym teacher orders 42 tennis balls. Each package contains 3 tennis balls. Which of the following equations represents the number x of packages?
A. x + 3 = 42
B. 3x = 42
C. x/3 = 42
D. x = 3/42

B

Step-by-step explanation:

3 balls in each package and you multiply that by the number of packages to get the total amount of tennis balls

B. 3x = 42

Explanation:

When you figure out what x represents you should be able to multiply x and 3 to get 42.

Also to find x divide 42 by 3.

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!

a negative exponent is translated as follows:

so, we have