This would be the commutative property of multiplication which basically states that a * b = b * a (u can switch the order of the numbers and the answer will be the same)
Answer:
x= 15
Step-by-step explanation:
4x+15=75
4x = 60
x = 15
Answer:the son working alone will take 1¹/₂ hours
Step-by-step explanation:
Step 1
let x represent the hours that the son needs to wash and wax the car alone thus his rate is 1/x cars per hour
While
the rate of the father is 1/3 cars per hour
, working together rate is 1/1 cars per hour.
Step 2
Writing it mathematically, becomes
1/x + 1/3 = 1/1
Dividing through by 3x so all denominations can be rqual to 1 , we have
3 + x = 3x
3= 3x-x
3= 2x
x= 3/2
Therefore the son working alone will take 1¹/₂ hours
Brandon had four servings of meat and milk to complete his diet. After adding up all of the fruit/veggie and bread/cereal, we are left with 720 calories. Divide this by 180, the number of calories in one serving of milk and meat, and you get four.
