The answer is c because there asking for the rate of change which is $20 per month
The total scores of the x students from class A can be calculated by multiplying x and the average which is equal to 85. That is 85x.
In similar manner, we are able to find for the total scores of the students from Class B. That would be, 90y.
Combining the scores, the new average then becomes 88. This is equal to,
(85x + 90y) / (x + y ) = 88
Cross-multiplying,
85x + 90y = 88x + 88y
Combine all the x's and y's in each side of the equation.
85x - 88x = 88y - 90y
Combining terms,
-3x = -2y
The ratio is obtained through the step below,
-3x/-3y = -2y/-3y
x/y = 2/3
Thus, the ratio is 2/3.
Answer:
<h2>x = 4</h2>
Step-by-step explanation:
Multiply through by 4 to eliminate the fraction
That's
<u>Subtract x from each side</u>
That's
<u>Subtract 8 from each side</u>
<u>Divide both sides by 3</u>
We have the final answer as
<h3>x = 4</h3>
Hope this helps you
Answer:
I think it is 272
Step-by-step explanation:
Not every month has the same amount Winter is about 89 days long. -- Autumn is 90 days. -- Spring is 93 days
Answer:
Step 1. The answer is no.
Step 2. The answer is b.
Step-by-step explanation:
I think Step 2 already sort of explains the reasoning behind the answer for step 1.
Hope this helps!
