Substituting 9 in for X creates the number sentence: 9 + 15 <22

to find out if this is true or false, we need to add 9 + 15, which equals 24

the number sentence now becomes 24 < 22

24 is greater than 22, which means the number sentence is false

a number to substitute for X that would make the number sentence true could be 6

6 + 15 < 22

adding 6 to 15 equals 21

21 < 22 is a correct number sentence

substituting 3 for y creates the number sentence 4(3) = 12

we need to simplify the sentence to 4 x 3 = 12

next, we multiply 4 x 3, which equals 12

the number sentence then becomes 12 = 12, which means the number sentence is true

substituting 4 for h creates the number sentence 20 < 5(4)

to simplify the sentence, 20 < 5 x 4

next, multiplying 5 x 4 equals 20

the number sentence now becomes 20 < 20

the number sentence is false since it said 20 is less than 20

a number to substitute for H that would make the number sentence true could be 5

20 < 5(5)

20 < 5 x 5

5 x 5 equals 25

20 < 25 is a true number sentence