Answer:
20.5+10x
Step-by-step explanation:
For a single payment with compound interest, the equation to use is F=P(1+i)^n where F is the value after n periods, P is the present value, and i is the interest rate.
If we want the final value F to double in 5 years, F is then equal to P then n=5. The equation is now:
2P=P(1+i)^5
2=(1+i)^5
i=14.87% per year
The answer is 7/8. 1/4 x 3 1/2 = 7/8
Okay, so since both y values share the same number, let's add both equations so the y values cancel out leaving us to solve for x.
10x+(-5x)=5x
7y+(-7y)=0
1+24=25
Now we have 5x=25
divide both sides by 5 and we have x=5
Now that we know x=5, we can plug it into one of the problems to find y.
Let's do 10(5) +7y=1
50+7y=1 subtract 5 and we get 7y=-49
divide -7 from both sides and we get y=-7
so there you have it x=5 and y=-7
This is just for the first page
1: 9
2: 9.2
3. 1/4
4. 10.2
5. 99
6. 2 1/7
7. 15.9
8. 125
9. 200
10. |15| and |-15|
11. <
12. =
13. <
14. >
15a. boat A is 33 and boat B is 25
15b. boat B is closer
16. -12, -9, 0, |-7|, 12, |-13|
17. -17, -15, |-16|, |-18|, |-20|, 22
18. 0
19. 4
20. -3