Explain how you can solve exercise 3 mentally

An international airport sells scarves for 19 US dollars, 150 Hong Kong dollars, 130 South African rand, or 14 euros. If the current exchange rate is 1 US dollar = 8 Hong Kong dollars = 7 South African rand = 0.

The functions q and r are defined as follows. q (x) = 2x-1 r (x) = - 2x^2+2 Find the value of q (r (-3)) =

I have a mixture of $1 and $5 bills. There are a total of 73 bills that total $233 dollars. how many ones and fives I have?

If 28 g of cashew nuts contains 14 g of fats. How many grams of fat are there in 42g of cashew nuts?

The number of subsribers to a web service is growing exponentially. if there were 100,000 subsribers initially and it grows by 2.4% per month, how many subsricbers will there be after a year?

In Ellen's sixth grade class there are 14 boys and 11 girls write each ratio using numbers in two ways

What number is this 40+5+.6+.03 what is it in word form and standadrd form

A building has 4 offices. There are 4 people in each of the offices. Each person has 4 chairs. How many chairs are in the building?

There are 28 student desks in a class. Each desk measures 26.17 inches. If you were to line up all the desks end to end how long would hey be

Apply the distributive property to write an equivalent expression 21b + 23c