Same as before, to make the formula do
t(1) * (r)^n-1
So 5 * (-1/2)^n-1
Therefore
5*(-1/2)^5
0.078125
Let
be the amount (gal) of the 40% slime solution you end up using. You want to end up with 120 gal of the 50% solution, so that you would use
gal of the 70% solution.
You want the final solution to consist of 50% slime, or 60 gal of slime. Each gal of the 40% solution contributes 0.4 gal of slime, while each gal of the 70% solution contributes 0.7 gal of slime. This means




so the answer is B.
Answer:
11) 67%; 12) 25%
Step-by-step explanation:
Problem 11: Find the fraction representing 30 out of a total of 45, and then multiply the result by 100%:
30/45 = 2/3 = 0.67; then we see that 30 is 67% of 45.
Problem 12: Same method:
16/64 = 1/4 = 0.25. Mult. this by 100%: 16 is 25% of 64.

therefore, the sum of this infinite geometric series can be calculated using the formula
.
So, 
If 2 is the sum of this infinite series, then you'll never reach it.
Answer:
equation: y = -2x + 7
Step-by-step explanation:
y = mx + b M: slope b: y intercept
m = -2
x = 3 and y = 1
b = y - mx = 1 - (- 2) x 3 = 7
equation: y = -2x + 7
check: ( 3,1) -2 x 3 + 7 = 1