Question

Represent the answer of each of the following by an algebraic expression.

(A) What is the result of adding 5 to an unknown number x and then multiply the sum by 4?(solution and formula please)

(B) A car travels 70 km in and hour, find the distance travelled in y hours. (solution and formula please)

Answer 1

(A) 4(x+5). Distribute the 4 (multiply both numbers by 4) and you get

4x+4*5

4x+20

(B) 70 km/h * y hours is 70y km, because you traveled 70 km every hour, so it's 70 times y.