Answer:
hope this answer will help u.
Step-by-step explanation:
<em>( 5x + 3y )² - ( 5x - 3y )² - 60xy</em>
<em>= ( 25x² + 30xy + 9y²) - ( 25x² - 30xy + 9y² ) - 60xy</em>
<em>= 25x² + 30xy +9y² - 25x² + 30xy - 9y² - 60xy</em>
<em>= 60xy - 60xy</em>
<em>= 0</em>
Answer:
m = 7
m = -7
Step-by-step explanation:
Answer:
40/50
Step-by-step explanation:
The test is worth 50 points in total. Each question is worth 5 points. So,
50 points ÷ 5 points each = 10 questions
If he gets 2 questions wrong,
10 - 2 = 8
He got 8 out of 10 questions right.
Now, multiply by 5 to find his test score out of 50.
8 × 5 ÷ 10 × 5
= 40/50
His test score would be 40/50.
Hope that helps.
Answer =
0.89
Step by step explanation
Answer:
x = -2
Step-by-step explanation:
Solution:
-5x - 5y = 25 -(1)
3x + 5y = -21 -(2)
Adding (1) and (2),
-5x - 5y + 3x + 5y = 25 - 21
-5x + 3x -5y + 5y = 4
-2x = 4
x = 4 / -2
Therefore, x = -2
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