What is the answer?

xy = 30

and x + y = 18

What is - 2 (w-5) + 4w+3 simplified

Complete the area model representing the polynomial x2 - 11x + 28. What is the factored form of the polynomial? Use the model to rewrite the expression.

3 (7-9x) - 5 (5x+1) = - 8 (9x-4)

Prove by induction that n! ≤ n^n for all n ∈ N.

Melissa bought a cake that cost $75. The sales-tax rate is 10 percent. What is the total amount she paid for the cake? $0.75 $7.50 $75 $82.50

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.