100.75 because you multiply then divide
To solve this you need to make all of the percentages for the scores go back 2 decimals. For example: 82 --> 0.82
Next you multiply the decimal by the percent on the test.
0.90 × 75 = 67.5
0.95 × 10 = 9.5
0.82 × 15 = 12.3
Finally you add all of them up and get an answer.
67.5 + 9.5 + 12.3 = 89.3
Samantha achieved a 89.3% on her test.
Please make me the Brainliest!
They can earn 5$ because that is an average amount for dogs
Answer:
<u>The value of Y is - 9.</u>
Step-by-step explanation:
1. Let's start with the first equation to find out the value of Y.
7x + 2y = 3
2y = 3 - 7x
<u>y = 3/2 - 3 1/2x</u>
<u>2. </u>Now let's work with the second equation to find out the value of Y.
x - 3y = 30
x - 3 (3/2 - 3 1/2x) = 30
x - 9/2 + 21/2 x = 30
x + 21/2 x = 30 + 9/2
2x + 21x = 60 + 9
23x = 69
<u>x = 69/23</u>
<u>x = 3</u>
<u>3.</u> Now let's substitute the value of X in the first equation, to find out the value of Y.
7 (3) + 2y = 3
21 + 2y = 3
2y = 3 - 21
<u>2y = -18</u>
<u>y = - 9</u>
<u>4. </u>Proof of the values of X and Y on the second equation
x - 3y = 30 (x = 3 and y = -9)
3 - 3 (-9) = 30
3 + 27 = 30
<u>30 = 30 This means that the values of x and y are correct.</u>
Answer:
-22, -20, (-2)2, 20, 22
Step-by-step explanation:
Negatives are smaller than positives but 22 is greater than 20 so we do -22, -20, (-2)2, (because -2*2 is -4), 20, 22