They will have the same amount of money after 7 weeks.
We first set these equal to each other:
36+4x=x²+15
We want to gather all of the variables on one side. Subtract 4x from both sides:
36+4x-4x=x²+15-4x
36=x²-4x+15
We want the equation to be equal to 0 to solve it, so subtract 36 from both sides:
36-36=x²-4x+15-36
0=x²-4x-21
We can factor this expression. We want factors of -21 that sum to -4; -7(3)=-21 and -7+3=-4:
0=(x-7)(x+3)
Using the zero product property, we know that x-7=0 or x+3=0; this means x=7 or x=-3. Since a negative number of weeks makes no sense, the answer is 7 weeks.
Answer:
1/2
Step-by-step explanation:
Subtract 15 from both sides of the equation
Simplify
Divide both sides of the equation by the same term
Simplify
ANSWER: x= 52/9
Answer:
66 cups
Step-by-step explanation:
16 cups in 1 gallon
16*6 = 96 cups in 6 gallons
96 - 30 = 66
Answer:
3.5x=24.5
3.5x7=24.5
X=7
Step-by-step explanation:
3.5 times what equals 24.5
3.5x1=3.5
3.5x2=7
3.5x3=10.5
Keep doing this and increase the number you are multiplying 3.5 by until your answer is 24.5.
