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777dan777 [17]
3 years ago
10

What is the first step in solving the following system of equations? 3 x + y = 23. 8 x + 2 y = 23. Substitute the value of y fro

m one equation into the other equation. Solve the first equation for y. Subtract the second equation from the first equation. Substitute the value of x from one equation into the other equation.
Mathematics
2 answers:
Taya2010 [7]3 years ago
5 0

Answer:

B

Step-by-step explanation:

Our system of equations is:

3x + y = 23

8x + 2y = 23

If we want to use substitution, that means that we essentially want to manipulate one of the two equations so that one variable (like y) is written in terms of the other (like x), and then substitute that expression into the second equation so that we have one variable and one equation and we can easily solve from there.

So the first thing to be done is to write one of the variables in terms of the other. It would be easiest to do it with the first equation and write y in terms of x - in other words, "solve the first equation for y".

The answer is B.

vlada-n [284]3 years ago
3 0

Answer:

Second option:

Solve the first equation for y.

Step-by-step explanation:

3 x + y = 23 (1)

8 x + 2 y = 23 (2)

To solve this system, first step is to make y the subject from (1)

y = 23 - 3x

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<img src="https://tex.z-dn.net/?f=18%20310%20%E2%88%92%209%20910%20%3D" id="TexFormula1" title="18 310 &minus; 9 910 =" alt="18
Marta_Voda [28]

Answer:

8400

Step-by-step explanation:

18310 - 9910

= 8400

Hope it helps you!!

#IndianMurga(. ❛ ᴗ ❛.)

3 0
3 years ago
A restaurant used 8.4
Anarel [89]
Just divide 8.4 by 6. And you’ll get 1.4 ounces on each piece of pizza.
3 0
3 years ago
Explain why segments connecting any pair of corresponding vertices of congruent pentagons are congruent. make a sketch to suppor
Veronika [31]

Answer:

Congruence between pentagons

Step-by-step explanation:

The relationship occurs because having two congruent Pentagons and generating a segment within them (or outside), congruence is extrapolated to the triangles generated within them. Thus, if there is congruence among the pentagons, it will exist between the formed triangles. In other words since the two pentagons are congruent, the corresponding angle pair is congruent. also the two corresponding side pairs are also congruent.

In the attached image for example, the ABCDE and KLMNO pentagons are congruent, so all of their internal division lines are also congruent (AC and KM)

8 0
3 years ago
The diagram shows a square-based cuboid.
san4es73 [151]

Answer:

wgxvbdx

Step-by-step explanation:

sorry

7 0
2 years ago
How would I do this? What would it be?
Igoryamba

Answer: x=80

Step-by-step explanation:

By definition, the sum of the exterior angles of a polygon is 360 degrees.

Knowing this, you can write the following equation:

(x+8)+(2x+12)+(x+20)=360

Then, you must solve for "x" in order to find its value. To do it, you can follow these steps:

1. You need to add the like terms:

(x+8)+(2x+12)+(x+20)=360\\\\4x+40=360

2. Now, subtract 40 from both sides of the equation:

4x+40-(40)=360-(40)\\\\4x=320

3. Finally, you must divide both sides of the equation by 4. Then:

\frac{4x}{4}=\frac{320}{4}\\\\x=80

7 0
3 years ago
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