Question

Combine the like terms to simplify the expression:

10xy2 + 5x – 4y3 + 6 – x + 5x2y + 6xy2 – 2
A.

10xy2 + 5x2y – 4xy3 + 4
B.

21xy2 + 4x – 4y3 + 4
C.

16xy2 + 5x2y + 4x – 4y3 + 4
D.

16xy2 + 5x2y + 4
Question 2


Which is 3125 written as a power of a number?
A.

55
B.

53
C.

35
D.

65
Question 3


What is the value of 21 + 2a4 – 4b2 when a = -2 and b = 3?

Answer 1

10xy^2 + 5x - 4y^3 + 6 - x + 5x^2y - 2
Like terms will have exactly the same letters and exponents
I willl separate the like terms so you can see..
10xy^2 -- there is no other like term for this
5x - x = 4x
-4y^3 -- there is no other like term for this
6 - 2 = 4
5x^2y -- there is no other like terms for this
so we are left with : 10xy^2 + 5x^2y - 4y^3 + 4
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not sure about this one....55^2 = 3025...but not 3125
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Let me refresh the page to do the last one...I am just seeing black diamonds

Answer 2

21 + 2a^4 - 4b^2 when a = -2 and b = -3
this is just a matter of subbing and solving
21 + 2(-2^4) - 4(-3^2)
21 + 2(-16) - 4(9)
21 - 32 - 36
21 - 68
- 47