Answer:
143 oil changes
Step-by-step explanation:
We first find the unit rate.
(91 oil changes)/(7 days) = 13 oil changes/day
Since we want to know the number of oil changes in 11 days, we multiply the unit rate by 11 days.
13 oil changes/day * 11 days = 143 oil changes
Answer: 16 questions
Step-by-step explanation:
To find how many problems the student correctly answered on the test, we can turn 80% into a fraction.
The student answered 16 questions correctly.
The value of (0.3)^4 is 0.0081.
Unless you mean 0.3*4, then it is 1.2.
x^2 - 49 = 0
Add 49 to both sides:
x^2 = 49
Take the square root of both sides:
X = 7
<span><span>27≤7x+6</span> </span>
to solve for x you'll have to subtract 6 from both sides then divide both sides by 7
<span><span>21≤7x</span></span>
<span><span /></span>
<span><span><span>3≤x</span> </span></span>
