What is the surface area of this square pyramid?

A.

252 cm2

B.

108 cm2

C.

189 cm2

D.

144 cm2

Which number has the same value as 30 tens?

A contractor buys 20 yd of nylon carpet and 18 yd of wool carpet for $1898. a second purchase, at the same prices, includes 20 yd of nylon carpet and 25 yd of wool carpet for $2255. find the cost per yard of the wool carpet.

Simplify 3a-3b/3a+12b

Show me the break down for 52divide into 5256

A merchant is bagging potatoes that he will sell for 5$ a bag. He wants to take in at least 400$ for them. How many bags should he prepare

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.