What is r-9r simplified. Show steps

Which expression is equal to 5 (2x2 - 1) + 3 (7x2 + 1) ?

The longest side of a triangle is six more inches than the shortest side. The third side is twice the length of the shortest side of the perimeter of the triangle is 26 units, what's all three lengths of the triangle?

A rectangle has a perimeter, p, length, l, and width, w. which of the following represents l in terms of p and w?

5 1/3 + - 3 9/16. 5 1/3 + - 3 + 9/18

Always sometimes or never true is the Lcm of two numbers is the product of two numbers

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.