3 years ago

Solving systems of equations using substitution y=2x Y=-2x-4 X= Y=

Mathematics

1 answer:

podryga [215]3 years ago

6 0

Answer:

hope this helps

Step-by-step explanation:

y=2x

y=-2x-4

2x+2x=-4 (grouping like terms)

4x=-4

x=-1

im sorry but im not sure what y is

You might be interested in

Muffins74blueberry muffins7banana nut muffins6pumpkin spice muffins11

BartSMP [9]

6/74 i think. So #banananutmuffin/#muffinsintotal

6 0

3 years ago

Right Triangle with legs of 15 and 20, what is the length of the Hypotenuse?

ioda

15^2 + 20^2
= 225 + 400
= 625
square root of 625 = 25

answer:<span>length of the Hypotenuse is</span> 25

5 0

3 years ago

Which points are on the graph of f(x) = RootIndex 3 StartRoot x EndRoot? Check all that apply. (–27, –3) (–1, 1) (0, 0) (1, 1) (

Vanyuwa [196]

Answer:

(-27,-3) (0,0) (1,1)

Step-by-step explanation:

Because I got it right xD

6 0

2 years ago

Read 2 more answers

One antifreeze solution is 20% alcohol. Another antifreeze solution is 12% alcohol. How many liters of each solution should be c

katrin [286]

Use this systems of equations to solve:

x = first antifreeze
y = second antifreeze

$\left \{ {{.2x + .12y = .18(15)} \atop {x + y = 15}} \right.$

Isolate y.

x + y = 15
Subtract x from both sides.
y = -x + 15

Substitute y into the other equation.

.2x + .12(-x + 15) = .18(15)
Simplify.
.2x - .12x + 1.8 = 2.7
Subtract 1.8 from both sides.
.08x = .9
Divide both sides by .08
x = 11.25

Substitute x in the equation that we isolated y in.

y = -11.25 + 15
y = 3.75

11.25 L of the first antifreeze and 3.75 L of the second.

5 0

3 years ago

Y=1/4x+5<br> y=-x<br>what are the x and y values, I think I'm supposed to use substitute

I am Lyosha [343]

Answer:

the answer are x=4y-20

and x represents the independent variable and y represents the dependent variable

5 0

3 years ago