Algebra
posted by Sharon (ms. Sue) .
Can you please check my work? You have helped other students I know. Thank you:)
Multiply
7(2a2 4) = 14a2 + 28
Multiply
0.5(a + b 5) = 0.5a + 0.5b  2.5
Factor
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
Answer: 135
Write as a fraction and simplify
Z4
Answer: 1/z4
Write using negative exponents
1/64
Answer: 64
Multiply and simplify
3small2 • 3small6 = 81
Divide and simplify
4small2/4small4 = 16
Divide and simplify
Y/y5 = 1
Simplify
(2small3) small2 =32
Simplify
(xsmall1 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
Solve
X  2.1 = 7.5
Answer: x = 5.4
Solve
2.3 = y/2
Answer: y = 4.6
Solve
2  x = 11 (x  1)
Answer: x = 13/12
Please check my answers.

Did you see lidia's response?
http://www.jiskha.com/display.cgi?id=1320785885 
Yes! Great! I wasn't sure if she was a tutor or not thank you.

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. 
Evaluate the expression 3x2y when x = 3 and y = 5.
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