Answer the question in the included image?

2x+15 +2x+3x+20+9=100

7x+44=100

7x=100-44=56

=> x=56:7

x=8

=> 4x+15=32+15=47  stamps in the 20th century

Probability=47/100;   47%

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!

answer: all the values are within because it has a pattern that repeats from -6 to 4.

good luck!