Answer:
x= 13
Step-by-step explanation:
x + 8 = 21
x + 8-8 = 21-8
x = 13
The original expression is given by:

The correct way to rewrite the expression is given by:

For this, we use two properties:
Associative property:
The way of grouping the factors does not change the result of the multiplication:
Commutative property:
The order of the factors does not vary the product:
The teacher would have to grade 322 problems
14 (problems) x 23 (students)
Answer: 322
Answer:
15x+20
Step-by-step explanation:
you multiply 3x×5 and you get 15 and then you multiply 5×4 and you get 20
Formula: C= 2(pi)r
C = 6.28
pi = 3.14
r = ?
6.28 = 2(3.14)r
6.28 = 6.28r
r = 1