When s is 20 t is 4
when s is 10 t is 2
when s is 30 t is 6
Answer:
39/37 and 6/5
Step-by-step explanation:
To start, let's assume that 9-8x is positive (we will do this to get rid of the absolute value, but then check later). We get 9(9 - 8x) = 2x + 3, or 81 - 72x = 2x + 3, so 74x = 78 and x = 39/37. If we assume 9-8x is negative, the |9-8x| will turn into 8x-9, so we get 9(8x - 9) = 2x + 3, or 72x - 81 = 2x + 3 , so 70x = 84 and x = 6/5. If we plug the values back in, 9-8(39/37) needs to be positive, which works, and 9-8(6/5) needs to be negative, and this works, so the answers are 39/37 and 6/5.
9514 1404 393
Answer:
5
Step-by-step explanation:
Add the latter two equations and you get ...
(a +b) +(a -b) = (7) +(3)
2a = 10 . . . . . . . . . . . . . . . simplify
a = 5 . . . . . . . divide by 2
Let's set up a proportion.
16/x= 80/100
16*5=80
x*5=100
x=20
Final answer: 20 questions total
If you would like to solve the system of equations, you can do this using the following steps:
y = - 3
y = x - 0.8
_________
y = y
- 3 = x - 0.8
x = - 3 + 0.8
x = - 2.2
(x, y) = (- 2.2, - 3)
The correct result would be <span>(- 2.2, - 3).</span>