The domain for f(x) and g(x) is the set of all real numbers. let f(x)=3x+5 and g(x)=x^2 find (f+g)(x) a. x^3+5 b. 3x^2+5 c. 3x^3+5x^2 d. x^2+3x+5

Hello from MrBillDoesMath!

Choice C

Discussion:

(f+g)(x) = f(x)        + g(x)

           = (3x + 5) + x^2

          = x^2 + (3x + 5)  by the commutative property

which is choice D

Thank you,

MrB

answer4 to the second power is 16

and 4 to the third power is 64,

if gloria has "carry over" minutes, (that is, any minutes paid for but not used in a month can be applied to her payment for minutes in the next month,) her total usage for the three months is: total minutes = 320 + 243 + 489 = 1052 minutes number of 200 minute blocks = 1052/200 = 5 r52 (that is 5 with a remainder of 52) rounding up the number of 200 minute blocks gives her usage for the three months as 6 blocks. the cost for six blocks is 6 x $25 = $150 she also has 200 - 52 or 148 carry over minutes if gloria pays each month and unused minutes are lost, applying the rounding up procedure to each month gives: first month usage of 320 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 second month usage of 243 minutes rounds up to 2 blocks of 200 minutes for a payment of 2 x $25 = $50 third month usage of 489 minutes rounds up to 3 blocks of 200 minutes for a payment of 3 x $25 = $75 total payments for the three months are $50 + $50 + $75 = $175 get the plan with carry over minutes!