For this question you would divide $8.52 by 36 pencils to get about $0.24 per pencil for brand A rounded to the nearest cent. Then divide $9.98 by 48 pencils to get about $0.21 per pencil for brand B rounded to the nearest cent.
The student first made an error in step 2 when she simplified... She should have used the distributive property to distribute the -4 through the parentheses. It should look like this...
-4 (y) = -4 (4 - 2z)
-4y = -16 + 8z
Answer:
x =± 6
Step-by-step explanation:
5x^2 = 180
Divide each side by 5
5/5x^2 = 180/5
x^2 =36
Take the square root of each side
sqrt(x^2) = sqrt(36)
x =± 6
From my understanding, the answer may be twenty over twenty-four