147 centigrams is equivalent to how many grams

The ratio of Monarch butterflies to Queen butterflies at a butterfly farm was 5:2. If there are no additional butterflies at the farm, what is the ratio of Queen butterflies to the total number of butterflies at the farm? A. 2:7 B. 5:7 C. 7:2 D. 7:5

If 2x^2+5x-12 = (2x-3) (x+4) which equations should be solved to find the roots of 2x^2+5x-12=0

Find the square root of 729/169. (Enter your answer like a rational number in standard form)

Helen has some pens and some square tiles. Each pen is 130mm longet. The sides of each tile are 13mm long. Helen lays ten pens end to end to make a straight line. She makes a line of tiles which is the same length as the line of pens.

X-9y=-23 Solve the equation for y

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.