Posted by Delilah on Monday, May 6, 2013 at 7:46pm.
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

Math help please  drwls, Monday, May 6, 2013 at 7:53pm
Your #7. is wrong
No. 9 could also be 1*10^8, but it should have two significant figures, as your answer does.

Math help please  Delilah, Monday, May 6, 2013 at 7:55pm
Can you explain #7 please

Math help please  drwls, Monday, May 6, 2013 at 8:01pm
Sure. The coefficient of x is the multiplying factor that appears on front of x.
In this case, it is 7

Math help please  Delilah, Monday, May 6, 2013 at 8:07pm
Oh ok! Thanks for explaining!

Math help please  bella, Wednesday, October 19, 2016 at 3:26pm
what the answer to 5x8=(5x2)+(5x

Math help please  Anonymous, Thursday, January 19, 2017 at 4:39pm
Ur dumb no offense

Math help please  Anonymous, Thursday, January 19, 2017 at 4:40pm
Omg, who just said that?! :(

Math help please  Jms, Thursday, January 19, 2017 at 4:41pm
How old are you??

Math help please  ma, Thursday, January 19, 2017 at 4:43pm
Get a life! @Delilah

Math help please  Jms, Thursday, January 19, 2017 at 4:44pm
So mean!
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