Answer:
6
Step-by-step explanation:
25-7=18 18/3= 6.
6x3= 18 18+7= 25
THE ANSWER IS 6
Answer: 57 = y
Step-by-step explanation: To find the value of <em>y</em> in this problem, we use the exterior angle theorem which states that the measure of the exterior angle of a triangle is equal to the sum of the measures of the remote interior angles.
So in the diagram shown, the exterior angle, 114,
is equal to the sum of the remote interior angles, y + y.
So we have 114 = y + y.
Solving from here, first combine like terms on the right side.
So we have 114 = 2y.
Now divide both sides by 2 to get 57 = y.
Let us say that:
x = the time it take for the new pump to drain the pool
alone
4x = the time it take for the older pump
And we are given that together they drain the pool in 4
hours, therefore:
1/x + 1/4x = ¼
Multiply everything by x:
1 + ¼ = ¼ x
1.25 = 0.25 x
x = 5 hours
So, 4x = 20 hours
<span>Hence it take the older pump 20 hours draining alone.</span>
