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
Furkat [3]
3 years ago
11

Given: 2x+30= -5(5x-2); Prove: x=-1

Mathematics
1 answer:
Viktor [21]3 years ago
5 0

Answer:

2(-1)+30=-5(5*-1-2)

-2+30=5(-5-2)

28 = 5(-7)

28= -35.

You might be interested in
Which of these choices are quadratic equations? Check all that apply.
balandron [24]

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which of the following is equivalent to sin(30°)?
Oduvanchick [21]

Answer:

A. cos(60°)

Step-by-step explanation:

sin(30 degrees) = 0.5

cos(60°) = 0.5

cos(90°) = 0

sin(60°) = √\frac{3}{2}

cos(30°) = √\frac{3}{2}

so it's A.

<em>Ace</em>

8 0
3 years ago
A triangle has vertices (-1, 2), (3, 1), and (7, 2). What is the approximate perimeter of the triangle? Round your answer to the
larisa86 [58]
Use the distance formula to find the length of the sides, then add them up to find the perimeter.

\sf d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

For points in the form of (x1, y1), (x2, y2).

(-1, 2), (3, 1)

\sf d=\sqrt{(3+1)^2+(1-2)^2}

\sf d=\sqrt{(4)^2+(-1)^2}

\sf d=\sqrt{16+1}

\sf d=\sqrt{17}

(3, 1), (7, 2)

\sf d=\sqrt{(7-3)^2+(2-1)^2}

\sf d=\sqrt{(4)^2+(1)^2}

\sf d=\sqrt{16+1}

\sf d=\sqrt{17}

(7, 2), (-1, 2)

\sf d=\sqrt{(-1-7)^2+(2-2)^2}

\sf d=\sqrt{(-8)^2+(0)^2}

\sf d=\sqrt{64+0}

\sf d=\sqrt{64}=8

So the perimeter will be:

\sf 8+\sqrt{17}+\sqrt{17}\approx\boxed{\sf 16.25}
3 0
4 years ago
Circle any 2 factors of 400
Alexxandr [17]

A factor is a group of 2 or more numbers that can be multiplied to make a greater number.

The factors for 400 include:

1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200

When paired together:

(1, 400), (2, 200), (4, 100), (5, 80), (8, 50), (10,40), (16, 25), (20,20)

Prime factors:

1, 2, 5

6 0
3 years ago
Read 2 more answers
PLEASE HELP ILL MARK BRAILEST
lbvjy [14]

Answer:

it is around 51

Step-by-step explanation:

sorry i'm doing this again, my answer got deleted :(

5 0
3 years ago
Read 2 more answers
Other questions:
  • Examples of benchmarks
    5·1 answer
  • Pls help fast this is khan academy
    14·2 answers
  • ABC below is a right triangle where the measure of AB is 6 units and the measure of ∠A is 50°. What would the area of the triang
    10·2 answers
  • Find the slope of the line that passes through the points shown in the table.
    10·2 answers
  • If I have 1 dollar and -2 how much do I have
    14·1 answer
  • HELP ME PLS IM DESPO
    12·1 answer
  • What slope of the line passes through (6,7) and (4,2)
    14·1 answer
  • Write an algebraic expression for the phrase.<br><br> the sum of f and 6
    7·1 answer
  • 4)
    8·1 answer
  • Factor this problem 49z^2-81
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!