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Natalka [10]
3 years ago
9

How to solve a system of three equations with substitution

Mathematics
1 answer:
zloy xaker [14]3 years ago
4 0

Answer:

Usually there are the variables x y z but it doesn't matter what they are.

Step-by-step explanation:

First choose your first variable to solve. Find x by putting all the numbers and variables to one side.

once you found x substitute the answer for x in all the equations. Next find y and substitute your answer in all the equations again.

Once you have solved 2 variables then you are able to solve z.  

If you have questions please feel free to ask in the comments below.

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Triangle ABC is a right angle. If AB =3 and AC =7, find BC. Leave your answer in simplest form
____ [38]

Answer:

4

Step-by-step explanation:

Ab=3 and ac=7 count 3 to 7 you counted 4.

5 0
3 years ago
5/8÷1/3 do you now the answer ​
Yakvenalex [24]

Answer:

15/8  

Step-by-step explanation:

This is a fraction so when dividing fractions you can multiply by the reciprocal.

5/8*3/1= 5*3/8*1 = 15/8  

4 0
3 years ago
calculate the following showing populations the temperature in Johannesburg was 15° it drastically decreased by 17 °c what is th
rusak2 [61]

Answer:

-2 degrees Celsius.

Step-by-step explanation:

15 - 17 = -2

8 0
3 years ago
Read 2 more answers
Helppppl pls I’m begging u
AlexFokin [52]

Answer:

4. James' hand

5. Salvador's plane traveled the furthest and Jennifer's plane traveled the shortest.

Step-by-step explanation:

4. James' hand is bigger because 0.17>0.165. You can add as many zeros to the end of each of them as you would like. You can think of this word problem as 0.170 versus 0.165. Or, if you needed to, you could pretend like they're whole numbers, and it would be 170 versus 165. Either way, 0.170 is going to be bigger than 0.165.

5. Salvador's plane traveled the furthest. Jennifer's plane traveled the shortest distance. All three numbers have a 3.3 in them. Now, it's a matter of who has the highest number in the blank after the 3.3: 3.3_. Because Jennifer's plane had a 0 in the blank, she traveled the shortest distance. 5 is bigger than 4.5, so Salvador's plane (the 3.35 one) traveled furthest.

4 0
3 years ago
Solve for x.<br><br> 3x−16+x=2x−2
romanna [79]

Answer:7

Step-by-step explanation:

3x-16+x=2x-2 combine like terms

4x-16=2x-2

4x-2x=16+-2 bring like terms together

2x=14 divide each side by 2.

X=7

8 0
3 years ago
Read 2 more answers
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