Of the 330 students at school, 72% are interested in learning French, 38%
Chinese, 30% both courses. If others are
interested in learning Spanish, how many are
interested in learning Spanish?

66 students

Step-by-step explanation:

Percentage of students learning Spanish = 100% - 72% - 38% + 30%

                                                                     = 20%

No. of students learning Spanish = × 330 students

                                                       = 66

three-fourths of an hour

36÷48=0.75

0.75=

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!