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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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A = 14.9 cm, b = 14.1 cm and C = 5.7 cm for the triangle shown below.
Kaylis [27]

Answer:

X is 22.5°

Step-by-step explanation:

» Let's assume our diagram is as above, from trigonometric ratio:

{ \tt{ \red{ \sin( \theta) =  \frac{opposite}{hypotenuse}  }}} \\

  • theta is X
  • opposite is a
  • hypotenuse is c

{ \tt{ \sin(x) =  \frac{a}{c}  }} \\  \\ { \tt{ \sin(x)  =  \frac{5.7}{14.9} }} \\  \\ { \tt{ \sin(x)  = 0.3826}} \\  \\ { \tt{x =  { \sin }^{ - 1}(0.3826) }} \\  \\ { \boxed{ \tt{x = 22.5 \degree}}}

8 0
2 years ago
What times what number give you 12 but when you add those numbers give you 4
SpyIntel [72]
There is nothing that multiplies to 12 and adds to 4.
8 0
3 years ago
Evaluate g(r)= -5r+13<br><br> g(3)=
andrew-mc [135]

Answer:

=-2

Step-by-step explanation:

Step 1- Substitute the variable

g(3)= -5(3)+13

Step 2- Multiply

g(3)= -5(3)+13

Step 3- Add

g(3)= -15+13

Conclusion-

g(3)= -2

5 0
3 years ago
Read 2 more answers
Simplify. x^3 ÷ x^5​
fomenos

Answer:

x^-2

Step-by-step explanation:

(x*x*x)/(x*x*x*x*x)

1/x*x

1/x^2

x^-2

3 0
3 years ago
Read 2 more answers
Jaylon Bedford ordered a combo meal that included 2 hamburgers and a drink. The combo cost $8.50. If the drink is $1.50, how muc
valentinak56 [21]

Answer:

$3.50 each

Step-by-step explanation:

First subtract the drink price from the total,$8.50-$1.50=$7. then divide that amount by 2 since he got 2 burgers. $7/2=$3.50.Each burger is $3.50.

7 0
3 years ago
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