What is the value of a in the equation 5a-10b=45, when b =3?

3
15
21
39

a = 15

Step-by-step explanation:

5a-10b=45

5a-10(3)=45

5a - 30 = 45

5a = 75

a = 15

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.

$450 i think. hope this ☺