Answer:
10 + 5xy = -80
Step-by-step explanation:
10 + 5xy = ?
x = 9 and y = -2
10 + 5xy = 10 + 5(9)(-2)
= 10 - 90
= -80
Answer:
We taking the same final exam
Step-by-step explanation:
I don’t know the answer that’s why I came here
Answer:
$12 per hour
Step-by-step explanation:
In order to find her hourly rate we have to find the amount of dollars billed per hour. To do this we can use this expression: ![\frac{y2 - y1}{x2 - x1}](https://tex.z-dn.net/?f=%5Cfrac%7By2%20-%20y1%7D%7Bx2%20-%20x1%7D)
Let's use the points (1, 27) and (2, 39) in the expression:
![\frac{39 - 27}{2 -1}](https://tex.z-dn.net/?f=%5Cfrac%7B39%20-%2027%7D%7B2%20-1%7D)
Now let's simplify the expression:
39 - 27 = 12
2 - 1 = 1
The expression simplifies to 12/1, or 12. This means that Brenda is billed $12 every hour she uses her phone.
I hope this helps :)