Posted by Sharon (ms. Sue) on Tuesday, November 8, 2011 at 4:23pm.
Can you please check my work? You have helped other students I know. Thank you:)
-7(2a2 -4) = -14a2 + 28
0.5(a + b -5) = 0.5a + 0.5b - 2.5
bx - by + bz = b(x - y + z)
Combine like terms (simplify)
12x + 4 - 11y - 6x - 9 - y = 6x - 12y - 5
Evaluate the expression
3x2y when x = 3 and y = 5
Write as a fraction and simplify
Write using negative exponents
Multiply and simplify
3-small2 • 3small6 = 81
Divide and simplify
4-small2/4small4 = 16
Divide and simplify
Y/y-5 = 1
(2small3) -small2 =32
(x-small1 ysmall1) small5 = ysmall5/xsmall5
Write in scientific notation
0.000005 = 5x10 -small6
Write in standard notation
31 x 10small7 =310,000,000
Perform the indicated operations (give your answer in scientific notation)
(5x10small2) x (5.6x10small4) = 2.8x10small6
X - 2.1 = -7.5
Answer: x = -5.4
2.3 = -y/2
Answer: y = -4.6
2 - x = 11 (x - 1)
Answer: x = 13/12
Please check my answers.
- Algebra - Ms. Sue, Tuesday, November 8, 2011 at 4:31pm
Did you see lidia's response?
- Algebra - Sharon (ms. Sue), Tuesday, November 8, 2011 at 4:36pm
Yes! Great! I wasn't sure if she was a tutor or not thank you.
- Algebra - Ms. Sue, Tuesday, November 8, 2011 at 4:54pm
Many of our questions are answered very well by other students.
I'm not really a math teacher, so I defer to answers that appear to be reasonable.
- Algebra - sue, Tuesday, September 4, 2012 at 5:32pm
Evaluate the expression 3x2y when x = 3 and y = 5.
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