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Anastaziya [24]
3 years ago
6

Please help!! I need the answer and the explanation on how to do this

Mathematics
1 answer:
strojnjashka [21]3 years ago
7 0

Answer:

the first one

Step-by-step explanation:

y=3x+2

2x+y=-4

becomes

3x+2=y

2x+4=-y

add them

5x+6=0

5x=-6

x=-5/6

take x and replace it for one equation

y=-8/5

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6b-9=-87 what is the answer
maw [93]

Answer:

Answer is below

Step-by-step explanation:

Add 9 to both sides.

6b-9+9=-87+9\\6b=-78

Divide both sides by 6

\frac{6b}{6} =\frac{-78}{6} \\b=-13

3 0
3 years ago
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Which line in the graph has the equation y= 1/2x + 2
Alexxx [7]

Answer:

3

Step-by-step explanation:

y= mx +b

b the y-intercept and is 2  so is red or purple line

m is the slope = 1/2  so rise 1 and run 2 is the purple line

4 0
3 years ago
Which ordered pair is the solution to the system of equations?
tiny-mole [99]

Answer:

You can use Gaussian Elimination.

Double both sides of the first equation and add the second equation.

6x + 4y = 8

5x - 4y = 3

---------------

11x      = 11

x = 1

5 - 4y = 3

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Step-by-step explanation:

7 0
3 years ago
Use synthetic division and the remainder theorem to find p(a) = 2x3 -x2 + 10x; = a = 1/2
sergey [27]

Answer:

p(1/2) = 5

Step-by-step explanation:

Find the value of p(1/2) if p(x) = 2x^3 -x^2 + 10x

Set up synthetic div.:

1/2   )   2   -1    10   0

                1      0    5

       ------------------------

           2   0    10     5

The remainder is 5, so we conclude that p(x) = 2x^3 -x^2 + 10x = 5 when x = 1/2.

8 0
3 years ago
Graph the linear equation x=-1
kipiarov [429]

Answer:

See below

Step-by-step explanation:

It's just a vertical line drawn at x=-1. See the graph for a visual.

6 0
3 years ago
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