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Novosadov [1.4K]
3 years ago
10

PLEASE HELP ASAP WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST!!Which of the following is the most direct first step in solving

the system of equations
below using the elimination method?
4x + y = -3
2x - y=5
That is, which of the following would be the first step in a method that would require
the fewest number of steps?

А. multiplying the first equation by -2

B. multiplying both equations by 2

С. adding the two equations together

D. multiplying the second equation by -2
Mathematics
2 answers:
jeka57 [31]3 years ago
5 0

Answer:

idek

Step-by-step explanation:

Vaselesa [24]3 years ago
4 0
The first step to solving this equation by using the eliminations method would be cancelling out the Y. You do this by adding the two equations together. The first portion of this would be to add negative Y to positive Y. This cancels out and haves you finished with the first part of the equation
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If 12 + 2 = 14, then 14 = 12 + 2 true or false​
SVEN [57.7K]

TRUE TRUE TRUE TRUE TRUE

5 0
3 years ago
Read 2 more answers
3) Solve each equation using the quadratic formula. Show<br> a. x2 – 3x – 10 = 0
Naya [18.7K]

Answer:

<h2>x = -2 or x = 5</h2>

Step-by-step explanation:

The quadratic formula of a quadratic equation

ax^2+bx+c=0\\\\\text{If}\ b^2-4ac>0\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

\text{If}\ b^2-4ac=0\ \text{then the equation has one solution}\ x=\dfrac{-b}{2a}

\text{If}\ b^2-4ac

We have:

x^2-3x-10=0\to a=1,\ b=-3,\ c=-10\\\\b^2-4ac=(-3)^2-4(1)(-10)=9+40=49>0\\\\x=\dfrac{-(-3)\pm\sqrt{49}}{2(1)}=\dfrac{3\pm7}{2}\\\\x=\dfrac{3-7}{2}=\dfrac{-4}{2}=-2\\or\\x=\dfrac{3+7}{2}=\dfrac{10}{2}=5

5 0
3 years ago
Find the product:<br><br> (r+2)(r-5)(r-2)(r+5)<br><br> Please show all steps.<br><br> 15 points.
Virty [35]

Hello from MrBillDoesMath!

Answer:

r^4- 29r^2 + 100

Discussion:

Rearrange the terms in the product as follows:

(r+2)(r-2) *  (r-5)(r+5)  =

(r^2 - 4) * (r^2-25) =

f^4 - (25+4)r^2 + 4*25 =

r^4- 29r^2 + 100

Thank you,

MrB

7 0
3 years ago
Read 2 more answers
Varies directly with the number of
yulyashka [42]

Step-by-step explanation:

Let p and h represent pay and hours worked respectively,

p = kh

k = p/h = 148.5/18 = 8.25

p= 8.25h

90.75 = 8.25h

h = 11 hours.

Hope it helps! :)

3 0
2 years ago
3x^2+48=0, solve the equation
MAXImum [283]

Answer:

16 + x2 = 0     (16)

I THINK

Step-by-step explanation: Simplifying

3x2 + 48 = 0

Reorder the terms:

48 + 3x2 = 0

Solving

48 + 3x2 = 0

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-48' to each side of the equation.

48 + -48 + 3x2 = 0 + -48

Combine like terms: 48 + -48 = 0

0 + 3x2 = 0 + -48

3x2 = 0 + -48

Combine like terms: 0 + -48 = -48

3x2 = -48

Divide each side by '3'.

x2 = -16

Simplifying

x2 = -16

Reorder the terms:

16 + x2 = -16 + 16

Combine like terms: -16 + 16 = 0

16 + x2 = 0

The solution to this equation could not be determined.

8 0
3 years ago
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