PLEASE HELP ME Carlos has $40 to spend on food for a barbeque. He wants to buy hot dogs and hamburgers and then buns for each. Carlos has already spent $31.56 on the hot dogs and hamburgers. Write and solve an equation to find, r, the amount of money Carlos can spend on rolls. Make sure to show all work. [3 points]
Equation:
Solution:

40=31.56+r     r=8.44

Step-by-step explanation:

40   =  31.56 + r

-31.56 -31,56

8.44=x

Hope this helps :)

step-by-step explanation:

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x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752