1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novay_Z [31]
3 years ago
8

Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .

Mathematics
1 answer:
Kisachek [45]3 years ago
3 0

Simplify √20 to 2√5

2 * 2√5 - 3√7 - 2√5 + 4√63

Simplify √63 to 3√7

2 * 2√5 - 3√7 - 2√5 + 4 * 3√7

Simplify 2 * 2√5 to 4√5

4√5 - 3√7 - 2√5 + 4 * 3√7

Simplify 4 * 3 √7 to 12√7

Collect like terms

(4√5 - 2√5) + (-3√7 + 12√7)

Simplify

2√5 + 9√7

Answer: B

You might be interested in
Give the equation of a line that goes through the point ( − 21 , 2 ) and is perpendicular to the line 7 x − 4 y = − 12 . Give yo
nlexa [21]

Given:

Equation of line 7x-4y=-12.

To find:

The equation of line  that goes through the point ( − 21 , 2 ) and is perpendicular to the given line.

Solution:

The given equation of line can be written as

7x-4y+12=0

Slope of line is

\text{Slope}=-\dfrac{\text{Coefficient of x}}{\text{Coefficient of y}}

m_1=-\dfrac{7}{(-4)}

m_1=\dfrac{7}{4}

Product of slopes of two perpendicular lines is -1. So, slope of perpendicular line is

m_1m_2=-1

m_2=-\dfrac{1}{m_1}

m_2=-\dfrac{4}{7}           [\because m_1=\dfrac{7}{4}]

Now, the slope of perpendicular line is m_2=\dfrac{4}{7} and it goes through (-21,2). So, the equation of line is

y-y_1=m_2(x-x_1)

y-2=-\dfrac{4}{7}(x-(-21))

y-2=-\dfrac{4}{7}x-\dfrac{4}{7}(21)

y-2=-\dfrac{4}{7}x-12

y=-\dfrac{4}{7}x-12+2

y=-\dfrac{4}{7}x-10

Therefore, the required equation in slope intercept form is y=-\dfrac{4}{7}x-10.

7 0
3 years ago
How to represent y=5x+40 with a table
Tems11 [23]
1 | 2.5
2 | 5
3 | 10
4 | 20
5 | 40
6 | 80
7 | 160
8 | 320
9 | 640

Hopes this helps!!!
5 0
3 years ago
Read 2 more answers
What is the expression is equivalent(23×2)×5
timurjin [86]

Answer:

230

Step-by-step explanation:

8 0
2 years ago
Solve the inequality:<br><br> 444 + 555y &lt; 333
zhannawk [14.2K]

The solution is y < -1/5

In order to find the answer to this problem, follow the order of operations for solving equations/inequalities.

444 + 555y < 333 -----> Subtract 444 from both sides

555y < -111 -----> Divide both sides by 555

y < -1/5

5 0
2 years ago
the final cost of a sale item is determined by multiplying the price on the tag by 75%. which best describes the function that r
Nezavi [6.7K]
It would be a linear equation
3 0
3 years ago
Other questions:
  • Which two points represent solutions to the equation 3x−9y=18? (−6,1) (−3,−2) (0,2) (6,0) (9,1)
    12·1 answer
  • The perimeter of a rectangle is 50 feet and its area is 154 feet. What are the dimensions of the rectangle
    7·1 answer
  • Could you please help me out ?
    6·1 answer
  • Why was the baby any confused ?
    12·1 answer
  • You are purchasing 2 shirts at $10.00 (each) and 1 pair of jeans at $35.00 (each). You have a coupon for 10% off. How much is th
    8·2 answers
  • The product of a number, x, and six is four more than the product of the number and three-eighths.
    6·1 answer
  • Giả sử tỷ lẹ bệnh nhân tại 1 thành phố là a%
    5·1 answer
  • Help please I don’t know how to do this
    5·1 answer
  • There is _____ rational numbers between any two rational numbers​
    11·1 answer
  • The ratio of one side of ACDE to the corresponding side of a similar AFGH IS 2:5. The perimeter of A CDEIS 9.2 inches.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!