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Andreyy89
3 years ago
13

Identify a possible first step using the elimination method to solve the system and then find the solution to the system. 3x - 5

y = -2 2x + y = 3 A) Multiply first equation by -3 and second equation by 2, solution (1, 1). B) Multiply first equation by -2 and second equation by 3, solution (1, 1). Eliminate C) Multiply first equation by -3 and second equation by 2, solution (1, -1). D) Multiply first equation by -2 and second equation by 3, solution (1, -1)
Mathematics
1 answer:
irina1246 [14]3 years ago
5 0

ans is b...multiply eqn 1 by -2 and eqn 2 by 3

=》 -6x + 10y = 4...eqn 3

=》 6x + 3y = 9...eqn 4

add eqn 3 and 4...

=》13y = 13

=》y =1 and x = 1

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Multiple Response: Please select all correct answers and click "submit." Which of the following are among the five basic postula
Kazeer [188]

To Euclid, a postulate is something that is so obvious it may be accepted without proof.

A. A straightedge and compass can be used to create any figure.

That's not Euclid, that's just goofy.

B. A straight line segment can be drawn between any two points.

That's Euclid's first postulate.

C. Any straight line segment can be extended indefinitely.

That's Euclid's second postulate.

D. The angles of a triangle always add up to 180.

That's true, but a theorem not a postulate. Euclid and the Greeks didn't really use degree angle measurements like we do. They didn't really trust them, I think justifiably. Euclid called 180 degrees "two right angles."

Answer: B C

4 0
3 years ago
I'm lowkey bout to have a heart attack if I don't get a tutor :(
allochka39001 [22]

Answer:

5(2x + 6) = -4(-5 -2x) + 3x

10x + 30 = 20 + 8x + 3x

10x + 30 = 20 + 11x

Applying the additive inverse property, we get,

10x + 30 - 10x - 20 = 20 + 11x - 10x - 20

10 = x

4 0
3 years ago
BEEN ASKING FOR A WHILE!! Find the perimeter and area for the triangle. Be sure to write the formula, and use correct measure. ​
Sauron [17]

Answer:

Area = 77ft²

Perimeter = 44 9/20 feets

Step-by-step explanation:

Area of a triangle = 1/2 * base * height

Base = 19 1/4 feets = 77/4 feets

Height = 8 feets

Area = 1/2 * 77/4 * 8

Area = (77 * 8) / 8

Area = 77 feet²

Perimeter of a triangle :

Sum of the sides

Perimeter = a + b + c

Perimeter = 19 1/4 + 10 + 15 1/5

Perimeter = 44 + (1/4 + 1/5)

Perimeter = 44 9/20

6 0
2 years ago
Question is in the image
Ira Lisetskai [31]
<h3>Answer:  g(x) = (-2/3)x^2</h3>

=====================================================

Explanation:

The blue parent function has a positive coefficient of 1. The purple g(x) function is a reflection of f(x) over the x axis, so everything is now negative. The coefficient must be negative as well.

But the answer is simply not g(x) = -x^2 because plugging x = 3 does not lead to y = -6 as the point (3,-6) shows.

Let's say the coefficient is k for now. So we have y = kx^2

Plug in x = 3 and y = -6. Solve for k

y = kx^2

-6 = k(3)^2

-6 = k*9

9k = -6

k = -6/9

k = -2/3

So we update y = kx^2 into y = (-2/3)x^2

Meaning that g(x) = (-2/3)x^2 is the equation of the purple curve.

Plug x = 3 into g(x) to find that

g(x) = (-2/3)x^2

g(3) = (-2/3)(3)^2

g(3) = (-2/3)(9)

g(3) = -6

which is the output we want, so this confirms we have the correct coefficient.

4 0
3 years ago
Read 2 more answers
HELP PLEASE? EXPLAIN IT a bit thanks will give medal and brainliest i need 2 answers
pshichka [43]
The mean is all the numbers added up and then divided by how many x's there are. In this case, it's 27+29+32+32+36+38+38+42+42 = 345, then you divide it by 9 (the number of x's) and you get 38.33

The median you be the number in the center of the string of numbers, 36 in this number line, because there are nine numbers total and 36 has four numbers on each side
27, 29, 32, 32, 36, 38, 38, 42, 42

The range is the biggest number minus the smaller number, 42-27

So the range is 15

3 0
3 years ago
Read 2 more answers
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