Asked by Delilah

7. In the expression –7x – 5x2 + 5, what is the coefficient of x?

7
5
–5
–7

8. Write the expression using a single exponent. 2^2 • 2^8

4^10
2^10
4^16
2^16

9. Write the expression using scientific notation. (2.5 • 104)(4 • 103)

10 • 10^7
10 • 10^8
1 • 10^8
10• 10^12

My answers:
7. 5
8. 2^10
9. 10 • 10^7
Answered by drwls
Your #7. is wrong
No. 9 could also be 1*10^8, but it should have two significant figures, as your answer does.
Answered by Delilah
Can you explain #7 please
Answered by drwls
Sure. The coefficient of x is the multiplying factor that appears on front of x.

In this case, it is -7
Answered by Delilah
Oh ok! Thanks for explaining!
Answered by bella
what the answer to 5x8=(5x2)+(5x
Answered by Anonymous
Ur dumb no offense
Answered by Anonymous
Omg, who just said that?! :(
Answered by Jms
How old are you??
Answered by ma
Get a life! @Delilah
Answered by Jms
So mean!
Answered by Anonymous
how old are u guys
Answered by Krieg The Psycho
got a 69 on this test;-; but the answers are.
1: one square 2 lines and the mini squares shaped like an L
2: 5f^2+11f-2
3: -5x^2+8x+2
4: -3x^2-x-5
5: 13x+2
6: -3x^2-13x-5
7: -7
8: 2^10
9: 1*10^8
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