6r+7=13+7r

this is precalculus

Adam is 6 feet tall how tall is adam in inches

What is the value of 7m - 3n when m = 3 and n = 2? A. 5 B. 15 C. 24 D. 36

What is the length of line segment S T if S is at - 5,-1 and T is at - 1,12? Round to the nearest hundredth.

How many rational roots does x^4+3x^3+3x^2+3x+2=0 have?

Round 7,639,552 to the nearest ten thousand

Jeffrey spent 2/3 hour on his homework how many minutes did he spend on home work

Sum of 7x times 7 + 3x+1 and - 4x times 4-x+3

2. If y (x-1) = z then x=

John (whose line of sight is g ft above horizontal) is trying to estimate the height of a tall oak tree. He first measures the angle of elevation from where he is standing as 30 degrees.

Question: Carbon-11 has a half-life of about 20 minutes. If we start with 200 grams, how much will be left after 3 hours? A. 25 grams B. 2.5 grams C. 0.39 grams D. 0.039 grams