Answer:
C. 21%
Step-by-step explanation:
Please kindly check the attached file for explanation.
Answer:
x = ± 15
Step-by-step explanation:
Given f(x) = - 0.5x² and f(x) = - 112.5 , then equate right sides
- 0.5x² = - 112.5 ( divide both sides by - 0.5 )
x² = 225 ( take square root of both sides )
x = ± 
= ± 15
Answer:
3d
Step-by-step explanation:
My brainliest please
Answer:
in this case, x is the amount more he needs to save per month
350=12(x+20)
distribute
350=12x+240
minus 240 both sides
110=12x
divide both sides by 12
9.166666=x
needs to save about $9.17 more per month or 29.17 permonth
Step-by-step explanation:
sorry if its wrong i tried and maybe i could get brainliest?
The time it will take Jack and Chris to program the app when they work together is 4.24 hours.
<h3>What is a rate?</h3>
Rate is a ratio that compares two different quantities which have different units.
Jack program an app in 9 hours. Therefore, the rate is as follows;
1 / 9
Chris can program the same app in 8 hours. Therefore, the rate is as follows;
1 / 8
When they do it together.
1 / 9 + 1 / 8 = 8 + 9/ 72 = 17 / 72
1 / t = 17 / 72
cross multiply
72 = 17 t
t = 72 / 17
t = 4.23529411765
t = 4.24
Therefore, the time it takes for both of them is 4.24 hours.
learn more on rate here: brainly.com/question/23895068?referrer=searchResults
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