15.If a = –5 and b = 2, evaluate 3a – 4b.
16.Use your calculator to evaluate the following expression if x = –2.57, y = 1.55, and z = –1.98. Round your answer to the nearest tenth.
17.List the like terms in the following group of terms.
–5t, –3st2, 3s2t, –7st2, –2st2, –5s2
18.Combine like terms.
2w – 3x – 8w
A)–w – 8x
B)–9w + x
C)–9wx
D)–6w – 3x
19.Divide.
A)m4n4
B)m4n3
C)m2n3
D)m2n4
20.Multiply.
a4b2 ab3
A)a5b5
B)a4b5
C)ab6
D)ab5
2007-01-27 01:11:20 · 4 answers · asked by Dave 4 in Science & Mathematics ➔ Mathematics
-23
wheres the expression
i dont know
d
divide what
what is that symbol
2007-01-27 06:17:07 · answer #1 · answered by wesnaw1 5 · 0⤊ 0⤋
I agree that you should do your own homework, especially when a calculator is involved. But here is some help:
1. If a = –5 and b = 2, evaluate 3a – 4b.
3(-5) - 4(2) = ?
2. What is the problem?Only to round those numbers?
3. Look for a commonality between all those expressions.
4. 2w – 3x – 8w
(2w - 8w) - 3x = ?
5. What is the problem? Those look like the answers.
6. Can't help - I don't know what ïï means. Are you multiplying those two terms?
2007-01-27 09:30:21 · answer #2 · answered by lou53053 5 · 0⤊ 0⤋
Asking for help with one problem for concept is OK.
Dumping your homework is inappropriate.
2007-01-27 09:53:20 · answer #3 · answered by Jerry P 6 · 0⤊ 0⤋
Do your own homework!
2007-01-27 09:20:39 · answer #4 · answered by alan_district 3 · 0⤊ 1⤋