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agasfer [191]
3 years ago
6

Please help will give brainiest to correct answer

Mathematics
2 answers:
lianna [129]3 years ago
4 0

Answer:1

Step-by-step explanation:

Flura [38]3 years ago
4 0

Answer:

gfd

Step-by-step explanation:

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You need to solve a system of equations. You decide to use the elimination method. Which of these is not allowed?
Serggg [28]

Answer:

B

Step-by-step explanation:

The <u>Elimination Method</u> is the method for solving a pair of linear equations which reduces one equation to one that has only a single variable.

  • If the coefficients of one variable are opposites, you add the equations to eliminate a variable, and then solve.
  • If the coefficients are not opposites, then we multiply one or both equations by a number to create opposite coefficients, and then add the equations to eliminate a variable and solve.

When multoplying the equation by a coefficient, we multiply both sides of the equation (multiplying both sides of the equation by some nonzero number does not change the solution).

So, option B is not allowed (it is not allowed to multiply only one part of equation)

8 0
3 years ago
I need help please. ​
Fed [463]

Step-by-step explanation:

(3x + 10) + (5x + 18) = 180 \\ 8x + 28 = 180 \\ 8x = 152 \\ x =  \frac{152}{8}  \\ x = 19

7 0
3 years ago
Three friends earned more than $200 washing cars they pay their parents $20 for supplies and divided the rest of the money equal
kow [346]
$90 because 200-10=180 and divide 180 by 2 which is 90.
3 0
3 years ago
Read 2 more answers
HELPPPP!!!! The Super Fencing Company builds cedar fences for homes at a cost of
Lina20 [59]

Answer:

16

Step-by-step explanation:

1400/85 = 16.47

largest integer below that is 16

6 0
3 years ago
Which statement about the following equation is true?<br>2x2-9x+2-1​
Furkat [3]

Complete Question:

Which statement about the following equation is true?

2x^2-9x+2 = -1

A) The discriminant is less than 0, so there are two real roots

B) The discriminant is less than 0, so there are two complex roots

C) The discriminant is greater than 0, so there are two real roots

D) The discriminant is greater than 0, so there are two complex roots

Answer:

C) The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

The given equation is 2x^2-9x+2 = -1 which by simplification becomes

2x^2 - 9x + 3 = 0

For a quadratic equation of the form ax^2 + bx + c = 0, the discriminant is given by the equation, D = b^2 - 4ac

If the discriminant D is greater than 0, the roots are real and different

If the discriminant D is equal to 0, the roots are real and equal

If the discriminant D is less than 0, the roots are imaginary

For the quadratic equation under consideration, a = 2, b = -9, c = 3

Let us calculate the discriminant D

D = (-9)² - 4(2)(3)

D = 81 - 24

D = 57

Since the Discriminant D is greater than 0, the roots are real and different.

3 0
3 years ago
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