Ask question

Ask question

All categories

3 years ago

12

Using the substitution method, Vito is solving the following system of equations algebraically: y + 3x = -4 2x-3y = -21% D Which

equivalent equation could Vito use?

1 answer:

masha68 [24]3 years ago

8 0

Answer:

He could use y+3x=-4

Step-by-step explanation:

When we subtract 3x on both sides, we get y=-4-3x, which means we just solved a variable and can substitute into the other equation 2x-3y=-21

You might be interested in

How do you solve this if you are solving for y<br><br> y=3xy-1

Angelina_Jolie [31]

Move all y terms to both sides
subtract both sides by 3xy

<span>y=3xy-1
y - 3xy = -1

factor out y from the left side: y(1 - 3x) = -1
divide both sides by (1-3x)

y = -1/(1-3x)
</span>

6 0

3 years ago

What is the standard form of a quadratic with a root of <br><img src="https://tex.z-dn.net/?f=2i%20%5Csqrt%7B3%7D%20" id="TexFor

kari74 [83]

Step-by-step explanation:

$2\sqrt{ - 3}$

5 0

3 years ago

A triangle has three equal sides.

OleMash [197]

Answer:

A. Equilateral Triangle

B. 60 degrees

5 0

3 years ago

Read 2 more answers

SOS MSENVJBQJBVKJQBH I NEED HELP- math is way to hard i think im gonna drop out lols 4(5 + 2x) – 5 = 3(3x + 7)

Oxana [17]

Answer: x= -6 I'm not sure about this though.

Step-by-step explanation:

3 0

2 years ago

Isaac drove at an average speed of 49 mph over 6 hours during the first three hours he drove at a speed that was 172 mph less th

IgorC [24]

Isaac drove the car at 44 mph during last three hours.

Step-by-step explanation:

Average speed = 49 miles per hour

Let,

s be the speed during last three hours

4s-172 be the speed during first three hours

Average = $\frac{Sum\ of\ items}{No.\ of\ items}$

$49=\frac{4s-172+s}{2}\\\\49*2=5s-172\\\\98=5s-172\\\\98+172=5s\\\\270=5s\\\\5s=270$

Dividing both sides by 5

$\frac{5s}{5}=\frac{270}{5}\\\\s=54$

Speed during last three hours = 54 mph

Speed during first three hours = 4(54)-172 = 44 mph

Isaac drove the car at 44 mph during last three hours.

Keywords: division, addition

Learn more about addition at:

#LearnwithBrainly

5 0

3 years ago