First, find the GCF. For these two numbers, it is 36. (Because 36 times 1 is 36 and 36 times 2 is 72)
Divide both sides by this, which gives you a
2:1 ratio
Answer:6minutes
Step-by-step explanation:
3 hours =180min
180min divided by 30 windows is 6
After 5 tests, her average was 88. To have a seven-test average of 90, the total must be:

Her average after 5 tests was 88. Her total score on the 5 tests is:

Subtract:

Find the average by dividing by 2:

Her average must be 95
(3x+4) units.
Working;
AM=AD+DM
=x+5+2x-1
=(3x+4) units