Simplify: a + 2a + 3a + 4a

Find the volume of a cylinder 20cm 11cm

What is the percentage of "85% of 78.00?" (Also needs calculation)

Which statements are true? Choose exactly two answers that are correct. Question 3 options: 4g^2 - g = g^2 (4 - g) 9g^3 + 12 = 3 (3g^3 + 4) 24g^4 + 18g^2 = 6g^2 (4g^2 + 3g) 35g^5 - 25g^2 = 5g^2 (7g^3 - 5)

A 155 pound person burns about 500 calories per hour playing racquetball. one pound id equal to 3500. Q - If the person were to rest 5 minutes for every 30 minutes of playing, how long would it take to burn 1 pound?

If a rectangle has a perimeter of 70 and width of 21, what is the length

Mia is taking art and calculus courses on Mondays. She is late for the art class with probability 0.5 and late for the calculus class with probability 0.4. Suppose the two events are independent.

Fill in the blank 9,15,24,39,63,102,165,_,432,699,1131

Fill in the other coordinate for line 2x-5y=11: (2)

H - 8 = 32 what is H?

To divide 14 2/3 : 2 3/4, Erik multiplied 14 2/3 x 4/3. Explain Erik's error.