<span>A tutor charges $40 plus $2/minute to do algebra homework.
Cost = 2*x + 40, where x is the number of minutes.
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8²+9(12÷3×2)-7
well we are going to start in the parentheses and do order of operations
so 12÷3=4
then 4×2=8
so you have 8² +9(8)-7
well we still need to get rid of the parentheses 9×8=72
so then we are left with 8²=72-7
so now we have to get rid of the exponents so8²=64
64+72-7
136-7=129
so 129 is your answer to the first one.
the second one is easy. its a single step equation.
you are trying to get x by itself. so you have 7x=42. you want to get rid of the seven so you have to do the opposite of what it is doing to x. the 7 is multiplying by the x. So whats the opposite of multiplication... division. so you have to divide both sides by 7. so you have 7÷7x=42÷7
now simplify and you have x=6
They overpaid him by $9 since they owed him 3 and paid him 12 (-3+12=9) then they overpaid by 9
X+5 >= 10
-5 -5
x >= 5
So, the answer is x >= 5
HOPE THIS HELPS!!!!
Answer:
Your answer would be 0.67
Step-by-step explanation: