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Naya [18.7K]
2 years ago
9

5. (9r 3 + 5r 2 + 11r) + (-2r 3 + 9r - 8r 2)

Mathematics
1 answer:
ad-work [718]2 years ago
3 0

Answer:

7r³ - 3r² + 20r

Step-by-step explanation:

(9r³ + 5r² + 11r) + (-2r³ + 9r - 8r²)

You can get rid of the parentheses since there is nothing to distribute.

9r³ + 5r² + 11r - 2r³ + 9r - 8r²

Combine like factors.

7r³ - 3r² + 20r

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a crew is made up of 20 men; the rest are women. 66 2/3% of the crew are men. How many people are in the crew? Show the work plz
liberstina [14]

20 men

66 2/3% men

66 2/3% of 30= 20

30+20= 50

50


Hope this helps!


6 0
3 years ago
The school cafeteria sells two types of wraps vegetarian and chicken the vegetarian wrap costs $1.00 and the chicken wrap costs
IRINA_888 [86]

Answer:

35

Step-by-step explanation:

Let's make a system of equations for the vegetarian and chicken wraps; one for the total cost of them and one for the total amount sold.

Vegetarian wraps will be represented by variable v and chicken wraps will be represented by the variable c.

  • v + 3.40c = 266.20
  • v + c = 103

Subtract these equations.

  • 2.40c = 163.20

Divide both sides by 2.40.

  • c = 68

Substitute this value for c into the second equation.

  • v + (68) = 103

Subtract 68 from both sides.

  • v = 35  

The number of vegetarian wraps sold amounted to 35 in total.

3 0
3 years ago
Read 2 more answers
Please help with these! or at least some of them.​
Fiesta28 [93]

Answer:

<h2>1) 9/2 = 5/4</h2><h2>5) False</h2><h2>6) $66</h2><h2>7) x=7</h2><h2>8) x=69</h2>

Step-by-step explanation:

5 0
3 years ago
41,000.00 minus 23,000.00
inna [77]
18,000.00.This is the answer 

8 0
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The scatter plot with trend line below shows the data comparing wind speed and wind
natulia [17]

Answer:

12

Step-by-step explanation:

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