Answer:
<em>80 - 2x</em>
Step-by-step explanation:
Given
Total number of people = 80 people
Total men = x men
Total women = x women
Let the number of childeren be c
x + x + c = 80
Make c the subject of the formula
c = 80 - (x+x)
c = 80 - 2x
<em>Hence the total children attending is 80 - 2x</em>
Answer:
Betty = $600
Step-by-step explanation:
3/4 of Alice's salary is the same as 1/2 of Betty's salary
(3/4)a = (1/2)b
multiply both sides by 2
(3/2)a = b
Alice earns $200 less than Betty
b - a = 200
Substitute for b
(3/2)a - a = 200
(1/2)a = 200
multiply both sides by 2
a = 400
b = (3/2)400
b = 600
Answer:
$55.25
Step-by-step explanation:
35% × 85 = 29.75
85 - 29.75
= 55.25
2.5 X 10^-3 is the scientific notation for 0.0025
