Let x be the score Amaya gets on the final test. She wants her average of all 3 tests to be between 80 and 89:
<span>80 ≤ (78 + 91 + x) / 3 ≤ 89 </span>
<span>Multiply everything by 3: </span>
<span>240 ≤ 78 + 91 + x ≤ 267 </span>
<span>240 ≤ 169 + x ≤ 267 </span>
<span>Subtract 169 from everything: </span>
<span>240 - 169 ≤ x ≤ 267 - 169 </span>
<span>71 ≤ x ≤ 98 </span>
<span>Answer: </span>
<span>She needs to score between 71 and 98 to get a B for the course.</span>
Answer:
<h3>15 multiplied by -9 first, then 7 subtracted from that total</h3>
<h2>hope it helps...</h2><h2>stay safe healthy and happy.</h2>
You need an minimum score of 170 on the fourth test to get an b for the course.
<em><u>Explanation</u></em>
The first three tests are for 100 points each and the fourth test is for 200 points. So the total points in 4 tests
To get an b in the course, you must have an average of at least 80% on the 4 tests. So, the minimum score needed to get an b :
Your scores on the first 3 tests were 72, 84, and 74.
So, the minimum score you need on the fourth test will be:
Answer:
There would be a horizontal dotted line on (0,8) and shading would occur below the line.
I just took the test and got it right :) hope this helps!