Question

1. What is the degree of the monomial 15x^3y^9
A. 12
B. 3
C. 9
D. 15
2. What is the difference 10c^3 - 8c^3
A. 18c^3
B. 2c^3
C. 3c^8
D. -80c^8
3. what is the sum 16x^3 + 9x^3
A. 25x^6
B. 25x^3
C. 7x^3
D. 24x^6
4. Find the difference (9a^4 + 2a^2 + 5) - (16a^4 - 7a^2 + 1)
A. 25a^4 - 5a^2 - 4
B. -7a^4 - 5a^2 + 6
C. 25a^8 + 9a^4 + 6
D. -7a^4 + 9a^2 + 4
5. Multiply 9x^2(2x^2 + 8x)
A. 18x^4 + 72x^3
B. 18x^2 + 72x^3
C. 11x^4 - 17x^3
D. 90x^4

Answer 1

So for 1. the degree is the highest power, for 2 thje difference means the value after sutraction. for 3 is the value after addition. for 4 again subtraction value, and 5 just multiply.

Answer 2

do you remember how to do this?

Answer 3

@lugerm i thought the answer (for number 1) was 9 because the the numbers dont add and the highest one is the answer

Answer 4

The degree of a polynomial is the highest degree of its terms when the polynomial is expressed in its canonical form consisting of a linear combination of monomials

Answer 5

So do you know the answer to number 1

Answer 6

C?

Answer 7

correct

Answer 8

\[3Y^915^3\]

Answer 9

9 is the highest power

Answer 10

is number 2 B?

Answer 11

Yes, since 10-8=2 and since they are to the third power we can subtract them simply leaving 2^3

Answer 12

is number 3 B?

Answer 13

Correct, again same degree just add 16+9, which =25, and the third so 25^3

Answer 14

@lugerm is number 4 B?

Answer 15

sorry was helping someone

Answer 16

its okay

Answer 17

its D

Answer 18

\[(9a^4 + 2a^2 + 5) - (16a^4 - 7a^2 + 1)\]

Answer 19

\[9a^4 + 2a^2 + 5 -16a^4 + 7a^2 + 1\]

Answer 20

\[-7^4 + 9^2 + 6\]

Answer 21

im not sure how to do number 5

Answer 22

since theres a -(-7) it becomes positive

Answer 23

let me take a look

Answer 24

\[9x^2(2x^2 + 8x)\]

Answer 25

ok so when you multiply polynomials, you add the powers

Answer 26

\[9x^2(2x^2) + 9x^2(8x)\]

Answer 27

now do you know?

Answer 28

A?

Answer 29

18^4 + 72^3\[18^4 + 72^3\]

Answer 30

ytes

Answer 31

did you get 100%?

Answer 32

i have 18 questions but itll only let me write 5 at a time :P