All categories

3 years ago

Find (2x^2-4)-(5x^2+2)+(7x^2-5)

Mathematics

1 answer:

fomenos3 years ago

7 0

( 2x² - 4) - ( 5x² + 2 ) + ( 7x² - 5) = ( 2x² - 4 - 5x² - 2 + 7x² - 5)

= (2x² - 5x² + 7x² - 4 - 2 - 5)

= 4x² - 11

You might be interested in

I need help, pls !!!

luda_lava [24]

Answer:

D) 11.2 Orange

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra II

Distance Formula: $\displaystyle d = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Step-by-step explanation:

Step 1: Define

Find points from graph.

Point (-8, -1)

Point (-3, 9)

Step 2: Find distance d

Simply plug in the 2 coordinates into the distance formula to find distance d

Substitute [DF]: $\displaystyle d = \sqrt{(-3+8)^2+(9+1)^2}$
Add: $\displaystyle d = \sqrt{(5)^2+(10)^2}$
Exponents: $\displaystyle d = \sqrt{25+100}$
Add: $\displaystyle d = \sqrt{125}$
Simplify: $\displaystyle d = 5\sqrt{5}$
Evaluate: $\displaystyle d = 11.1803$
Round: $\displaystyle d = 11.2$

8 0

3 years ago

What is the value of the expression 8 1/2 minus 2 plus 4 3/4

Zielflug [23.3K]

The answer is 11 1/4 or 11.75

4 0

3 years ago

Read 2 more answers

This question is called "Convert units multi-step word problems (US customary)". Need help for this!!

olga nikolaevna [1]

6 quarts

Step-by-step explanation:

1 quart is shared to his neighbour.

14-2

12/ 2 pits

6 pits

6 0

4 years ago

Find the MAD of this set of data.

barxatty [35]

Answer:

2.8

Step-by-step explanation:

The given data set is;

6, 12, 10, 9, 8, 6, 2, 4, 8, 15

The mean of this set is;

$\bar X=\frac{\sum x}{n}$

$\bar X=\frac{6+12+10+9+8+6+2+4+8+15}{10}$

$\bar X=\frac{80}{10}=8$

The mean absolute deviation is given by

$M.A.D=\frac{\sum |x-\bar X|}{n}$

$M.A.D=\frac{|6-8|+|12-8|+|10-8|+|9-8|+|8-8|+|6-8|+|2-8|+|4-8|+|8-8|+|15-8|}{10}$

$M.A.D=\frac{2+4+2+1+0+2+6+4+0+7}{10}$

$M.A.D=\frac{28}{10}$

$M.A.D=2.8$

5 0

4 years ago

Write 15.27 as a mixed number.

Anna [14]

Answer:

15 27/100 is 15.27 as a mixed number

4 0

4 years ago

Read 2 more answers