All categories

2 years ago

Find the sum of 3x² + 5x - 1 and x² - 2x -7

Mathematics

2 answers:

vova2212 [387]2 years ago

8 0

Answer:

4x^2+3x-8

Step-by-step explanation:

gizmo_the_mogwai [7]2 years ago

7 0

You might be interested in

If Benito is selecting samples of five values from the table, which row will result in the greatest mean? Population Data Row 1

Vilka [71]

Answer:

4th row will result in the greatest mean.

Step-by-step explanation:

We are asked to find the row with greatest mean from our given rows.

We will use formula $\bar{x}=\frac{\Sigma x}{n}$ , where,

$\bar{x}=\text{Mean}$ ,

$\Sigma x=\text{Sum of all data values}$ ,

$n=\text{Number of data points in sample}$

Let us find mean of each row using above formula.

$\text{Mean of row 1}=\frac{4+2+2+3+3}{5}$

$\text{Mean of row 1}=\frac{14}{5}$

$\text{Mean of row 1}=2.8$

Therefore, mean of 1st row is 2.8.

$\text{Mean of row 2}=\frac{3+3+4+3+2}{5}$

$\text{Mean of row 2}=\frac{15}{5}$

$\text{Mean of row 2}=3$

Therefore, mean of 2nd row is 3.

$\text{Mean of row 3}=\frac{2+4+3+4+3}{5}$

$\text{Mean of row 3}=\frac{16}{5}$

$\text{Mean of row 3}=3.2$

Therefore, mean of 3rd row is 3.2.

$\text{Mean of row 4}=\frac{3+4+4+7+3}{5}$

$\text{Mean of row 4}=\frac{21}{5}$

$\text{Mean of row 4}=4.2$

Therefore, mean of 4th row is 4.2.

Since 4th row has the highest mean, therefore, 4th row will result in the greatest mean.

6 0

2 years ago

Read 2 more answers

Camila and Evelyn work at a dry cleaners ironing shirts.Camila can iron 40 shirts per hour, and Evelyn can iron 20 shirts per ho

GalinKa [24]

60 shirts can be ironed per hour with two workers

8 0

3 years ago

Read 2 more answers

Please help me, i will give you brainliest

kifflom [539]

Answer:

52°i think

Step-by-step explanation:

148°-96°=52°

5 0

3 years ago

Suppose that farmer's grew an unexpectedly large number of tomatoes this year. How would this increase in production affect the

MArishka [77]

The price would decrease because they want to get rid of the tomatoes

5 0

3 years ago

Read 2 more answers

Higher Order Thinking What is the<br>least multiple 6 and 8 have in common?<br>Explain.

Dahasolnce [82]

Answer: 24

Step-by-step explanation:

6, 12, 18, 24

8, 16, 24

3 0

3 years ago

Read 2 more answers

Find the sum of 3x² + 5x - 1 and x² - 2x -7​​

Find the sum of 3x² + 5x - 1 and x² - 2x -7