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seropon [69]
3 years ago
11

Find the sum: (3x2 + 5x − 8) + (5x2 − 13x − 5)

Mathematics
1 answer:
Trava [24]3 years ago
8 0

The given expressions are 3x^{2}+5x-8 and 5x^{2}-13x-5

We have to find the sum of the given expressions,

(3x^{2}+5x-8)+(5x^{2}-13x-5)

Combining the like terms of both the expressions, we get

(3x^{2}+5x^{2})+(5x-13x)+(-8-5)

=8x^{2}-8x-13.

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Four friends each fipped a coin different numbers of times.
Gelneren [198K]

Answer:

Sarah

Step-by-step explanation:

Alice: 75%

Mary: 80%

Sarah: 85%

Ellen: 60%

4 0
2 years ago
The table lists the speeds of the fastest roller coasters in North America and Asia.
kotykmax [81]

The difference of the means of the two data sets is = 4.57

The mean absolute deviation of the roller coaster speeds in North America is 13.3

The mean absolute deviation of the roller coaster speeds in Asia is 16.8

<h3>How to solve for the means</h3>

First we have to start with the data for North America

128, 120, 100, 93, 92, 80.8, 85, 82, 80, 77

To get the mean you have to sum up the values and divide through by the total number 10

937.8/10

Mean = 93.78

Mean Absolute Deviation  = (128 - 93.78) + ( 120 - 93.78) + ( 100 - 93.78) + ( 93 - 93.78) + ( 92 - 93.78) + ( 80.8 - 93.78) + ( 85 - 93.78) + ( 82 - 93.78) + ( 80 - 93.78) + ( 77 - 93.78) / 10

133.32/10 = 13.3

For Asia, we have the data as

149.1, 106.9, 95, 83, 90, 80.3, 78.3, 71.5, 69.6, 68.4

Mean for Asia = 892.1/10

= 89.21

Mean Absolute Deviation = (149.1 - 89.21) + ( 106.9 - 89.21) + ( 95 - 89.21) + ( 83 - 89.21) + ( 90 - 89.21) + ( 80.3 - 89.21) + ( 78.3 - 89.21) + ( 71.5 - 89.21) + ( 69.6 - 89.21) + ( 68.4 - 89.21) / 10

= 168.32/10

16.8

The difference in the means = 93.78 -89.21

=  4.57

Read more on means here

brainly.com/question/12172431

#SPJ1

6 0
1 year ago
Use a bar model 20-x=6
irinina [24]

Answer:

sdffaf

Step-by-step explanation:

4 0
3 years ago
PLEASE HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
astraxan [27]

Answer: Order from Least to Greatest

-1/8 < 0.33 < 3/8 < 75% < 1 5/8

Step-by-step explanation:

To compare and order fractions we must first convert all integers, mixed numbers (mixed fractions) and fractions into values that we can compare. We do this by first converting all terms into fractions, finding the least common denominator (LCD), then rewriting each term as an equivalent fraction with the LCD. Then we compare the numerators of each fraction and put them in correct order from least to greatest or greatest to least.

7 0
3 years ago
Olivia’s house is located at the point (-5, 5) on the coordinate grid. Her best friend Jen’s house is at (2, 3) and the market i
rjkz [21]

Answer:

(a) (2, -2)

(b) 2.5 miles

Step-by-step explanation:

(a) The distance from Olivia's house (-5, 5) to the market (-5, -5) is the distance from 5 to -5 on the line x=-5. That distance is 5 -(-5) = 10 units.

The distance from Jen's house to the theater is half this, or 5 units. The theater is "directly below" Jen's house, so will have the same x-coordinate, and a y-coordinate that is 5 units less than that of Jen's house. The theater is located at ...

... (2, 3) -(0, 5) = (2, -2) . . . . theater location

(b) The 5 units from Jen's house to the theater represent a distance of ...

... 5 × (1/2 mile) = 5/2 miles = 2.5 miles

7 0
2 years ago
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