Answer:
x=3
Step-by-step explanation:
3(2x+3)=27
2x+3=27/3=9
2x=9-3=6
x=6/2=3
(40+x)/2=60
40 +x = 120
x = 80
check :
40+80 = 120
120/2 = 60
so his second round needs to be 80 mph
Answer:
2. f(-7)= -3(-7)-2
21-2
=19
10. h(1)= | 1-7(1) |
|-6|
=6
11. h(-7) =|1-7(-7)|
|1-49|
|-48|
=48
12. [23-h(9) =|1-7(-9)|]
h(9) =|1-7(9)|
|-62|
23-62
=39
Step-by-step explanation:
Each hour she works, she earns

dollars.
The first day, she worked 6 hours, so she'd earn

dollars.
The second day, she worked 8, so she'd earn

.
Together, she'd have earned

dollars.
You could add the number of hours she worked first and then multiply by

to get the same result. This would look like

.
<span>2(3x + 7) = -22
Use distributive property
6x+14=-22
Subtract 14 from both sides
6x=-36
Divide 6 on both sides
Final Answer: x=-6</span>