two more than four times a number is twenty six

The combined ages of a father and his son are 36 years.In seven years time the father will be four times as old as[..]

If a + b = 5 , ab = 1 then find out the value of a and b

If a + b = 5 , ab = 1 then find out the value of a and b

A family has two cars. The first car has a fuel efficiency of40 miles per gallon of gas and the second has a fuel[..]

What is the least perimeter of a rectangle with an area of 32 square

When priced at $30, a toy has monthly sale of 4000 units. For each $1 increase in price, sells will decrease by 100[..]

How many liters of 30​% silver must be added to 90 liters of 50​% silver to make an alloy that is 40​% ​silver? To[..]

Gabe​ Amodeo, a nuclear​ physicist, needs 60 liters of a 70​% acid solution. He currently has a 50 % solution and a[..]

Laura, Felipe, and Ahmad have a total of $ 80 in their wallets. Felipe has $ 5 more than Laura. Ahmad[..]