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14. Add: (a? + 3a + 4) + (6a2 +5)
A 7a2 + 3a + 9 B.5a2 + 5a + 15 C. ga²+1
D. 8a²+42 +6
15. Subtract: (5a2 + 5a + 7) - (4a2 + a + 4)
# a² +53 +3 B. 9a2+ 5a + 7 C. a² +42 +3
D 6a2 + 4a + 8
16. Translate, "four times the difference of a number x and 9” to mathematical phrase.
A 4X-9
B. (4x) - 9
C.4(X-9) D.4-(x +9)
17. How do you find the degree of the term 11xy4?
A By adding the exponents, 7
C. By finding the largest exponent, 4
B. By multiplying the exponents, 12 D. By finding the largest coefficient, 11
18. Which of the following is true?
A 3x + 5 = 11, if x = 2
B. The term x has no numerical coefficient.
C. The constant term of the expression 5x4 - 3x + 12 is 5.
D. -5xy, 3xy, and 7xy are algebraic expressions with two terms
19. Add and identify what type of polynomial is the sum of ( 2m4 +3m + 4 ) and ( m4 - 3m-4).
1​

14 Add A 3a 4 6a2 5A 7a2 3a 9 B5a2 5a 15 C Ga1D 8a42 615 Subtract 5a2 5a 7 4a2 A 4 A 53 3 B 9a2 5a 7 C A 42 3D 6a2 4a 816 Translate Four Times The Difference Of class=

Sagot :

ELAINE052117IN

Answer:

The total is C. 5a² + 2a - 9.

Step-by-step explanation:

\large\text{$\tt{(-2a^2+5a-8)+(7a^2-3a-1)}$}(−2a

2

+5a−8)+(7a

2

−3a−1)

\large\text{$\tt{=-2a^2+7a^2+5a-3a-8-1}$}=−2a

2

+7a

2

+5a−3a−8−1

\large\text{$=\boxed{\tt{5a^2+2a-9}}$}=

5a

2

+2a−9

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⒕ A. — 7a² + 3a + 9

Remove the parenthesis

a² + 3a + 4 + 6a² + 5

Collect like terms

= a² + 3a + 4 + 6a² + 5

= 7a² + 3a + 4 + 5

= 7a² + 3a + 9

⒖ C. — a² + 4a + 3

Remove the parenthesis and change the sign to subtraction ( When there is a - in front of an expression in parenthesis )

5a² + 5a + 7 - 4a² - a - 4

Collect like terms

= 5a² + 5a + 7 - 4a² + a + 4

= a² + 5a + 7 - a -4

= a² + 4a + 7 - 4

= a² + 4a + 3

⒗ C. — 4(x - 9)

⒘ A. — ³ + ⁴ = 7 degrees

⒙ A. — 3 x 2 = 6 + 5 = 11

⒚ 3m⁴

Remove the parenthesis

2m⁴ + 3m + 4 + m⁴ - 3m - 4

Collect like terms

= 2m⁴ + 3m + 4 + m⁴ - 3m - 4

= 2m⁴ + 4 + m⁴ - 4

= 2m⁴ + m⁴

= 3m⁴

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