Solving systems by elimination with multiplication: 8x+7y=20 and 4x-4y=-20

a recent study show that people spend about 37% of their time asleep About how much time will a person spend asleep during an average 78 year lifetime?

Solve the inequality. Graph the solution on a number line. 7x+2>3 (x-4)

Samuel is 5ft 3in he is standing next to a tree that is 26ft if Samuels shadow is 8.5ft what is the length of the trees shadow round to the nearest foot

Jon has $45.00. He plans to spends 4/5 of his moneyon sports equipment. how much will he spend

1/6, 2/5, 3/5, 3/7 order them from least to greatest

Estimate square root of 88

Calculate the amount earned if simple interest is paid on R2500 at 8.5% per annum for 4 years

Which expression is equivalent to 5 (8+9) ?

The number 900 has an interesting property in that the only primes that divide into it evenly are 2,3 and 5. Whatare the next two numbers after 900 that also have this property

4. Corrupt professor Z has a class of 50 students. He needs to give exactly 10 A's. However five students already have a special deal (they are professor Z's nephews and nieces) and will get A's for sure. How many ways can the 10 A's be distributed?