Which of the following expressions is always equivalent to -2b + 4 + 4b - 7
a. b + b
b. b divided by 2
c. 2b - 3
d. 2b + 4

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Ray ce is the angle bisector of zacd, which statement about the figure must be true? mzecd-mzecb mzace « 4mzacd zace - zdcb zecd zacd save and exit

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!