Answer:32 ÷ 4 = 8
5 × 8 = 40 girls
Step-by-step explanation:
Answer:
(a)y=-10x
(b)x=0.9
Step-by-step explanation:
If y varies directly with x, we write:
Therefore, a direct variation equation relating y to x is:
(a)y=-10x
(b)When y=-9
Substituting y=-9 into the equation obtained in (a) above
It would be D………………………….,
First you find how many miles the car travels per hour, to do so you can divide 420 miles by 8 hours:
420 miles/8 hours = 52.5 miles/hr
Now that you know the car travels 52.5 miles per hour, you can multiply it by 12 to find out how many miles the car travels in 12 hours.
52.5 · 12 = 630
The car travels 630 miles in 12 hours