MATHEMATICS MIDDLE SCHOOL

Simplify the polynomial: 2a–3b+c–(4a+7b+c+3)
15 points

Answers

Answer 1
Answer:

Welcome to Brainly.

To start out the problem, remove the parentheses.

2a - 3b + c - 4a - 7b - c - 3\n (2a -4a) + (-3b - 7b) + (c - c) - 3\n\boxed{-2a - 10b - 3]}
Answer 2
Answer:

Answer:

-2a-10b-3

Step-by-step explanation:

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A convex pentagon has the following measurements for its interior angles: (x-8), (3x-11), (x+8), (x), and (2x+7). Which of the following could be measurements for interior angles of the pentagon? Select all that apply.A: 60


B: 68


C: 76


D: 108


E: 193


F: 540

Answers

Answer: A, B, C, E

Explanation:

The sum of the interior angles of a polygon can be determined by the formula: (n - 2)180 ; where n represents the number of sides.  Since a pentagon has 5 sides, then (5 - 2)180 = 540

 x - 8

3x - 11

 x + 8

 x

2x + 7

8x - 4  =  540

    +4        +4

8x        =  544

÷8            ÷8  

 x         =   68

**********************

x - 8    ⇒     68 - 8 = 60  (A)

3x - 11   ⇒     3(68) - 11 = 193 (E)

 x + 8   ⇒     (68) + 8 = 76 (C)

 x         ⇒     (68)  (B)

2x + 7   ⇒     2(68) + 7 = 143

The sumof the pentagon's interior angles is: 540°

According to the Question, we have: (x-8)+(3x-1)+(x+8)+x+(2x+7)=540

x-8+3x-11+x+8+x+2x+7=540

x+3x+x+x+2x=540+8+11-8-7

8x=544

x=544/8=68


(x-8)=68-8=60 (choose letter A)

(3x-11)=3*68-11=193 (choose letter E)

(x+8)=68+8=76 (choose letter C)

(x)=68 (choose letter B)

(2x+7)=2*68+7=143 (cannot select any letter)

In short, we choose letter A, B, C and E.

Which fraction is equal to 0.8? Express your answer in simplest form. A. 3/5 B. 4/5 C. 1/8 D. 5/8

Answers

0.8 = 0.8 * (10)/(10) = (8)/(10) =(4* 2)/(5* 2) = \boxed{\bf{(4)/(5)}}

Answer is B

the ratio of dan's height to his fathers height is 5 to 6 and his father is 68 tall. How tall is Dan?

Answers

Dan is 56 (?) tall

Because 68 divided by 6 is 11.3333 and 11.3333 times 5 is 57 rounded

What is 1 3/4 - 2/3?

Answers

Your answer is 1.08333333333 by putting it in graph form and doing high heel shoe method.
2.583333333. First you divide them both and then subtract

Estimate the product of 68 and 42

Answers

We can round 68 to 70 
And round 42 to 40

70 x 40 = 2800
68(42)= 2856 
The number 68 is multiplied by 42 and is equal to 2856

Find the discount. regular price = $100; discount rate = 35%



A.
$350


B.
$35


C.
$3.50


D.
$65

Answers

As the amount is $100 dollars, you will have to find what 35% of this is. The best way to do this is to divide both 100 and 35 by ten, giving you ten and 3.5. AS 10 is 10% of 100, you should then multiply then, by three and half, therefore, giving you 35- meaning the discount is $35 dollars. Hope this helps
100\cdot35\%=100\cdot0.35=\$35
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