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tino4ka555 [31]
3 years ago
5

How do you solve linear equations in three variables?

Mathematics
2 answers:
barxatty [35]3 years ago
8 0
''Pick any two pairs of equations<span> from the system. Eliminate the same </span>variable<span> from each pair using the Addition/Subtraction method. Solve the system of the two new </span>equations<span> using the Addition/Subtraction method.''</span>
sleet_krkn [62]3 years ago
5 0
Really depends upon the 3 equations.
If you can find x in terms of y and z in one of the problems,
then substitute this back into the other two equations, then solve the 2 equations and two unknowns.
There are other elimination techniques but difficult to explain.
Or use the matrix solution technique in the TI calculator and use "rrde" to solve.
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Tim invest $5,000 in an account with a bank that offers an annual interest rate of 5%, compounded quarterly. Write the function
Marina86 [1]

9514 1404 393

Answer:

  A(t) = 5000(1 +.05/4)^(4t)

Step-by-step explanation:

The compound interest formula is ...

  A = P(1 +r/n)^(nt)

where principal P earns interest at annual rate r compounded n times per year for t years. The problem statement tells you P=5000, r=0.05, n=4. Putting these values into the formula gives ...

  A(t) = 5000(1 +0.05/4)^(4t)

3 0
3 years ago
Solve for m <br> 0.2m=3.5
fredd [130]

Answer:

m = 17.5

Step-by-step explanation:

Given 0.2m=3.5, we want to solve for m.  This involves isolating m on the left side.  To accomplish this, divide both sides by 0.2, obtaining:

m = 3.5/0.2, or m = 17.5

7 0
3 years ago
What is the simplified expression for 3a^2+9ab+5-4a^2-4ab +3?
seraphim [82]

Answer:

-4a^2+4ab+8

Step-by-step explanation:

our expression is

3a^2+9ab+5-4a^2-4ab+3

we are asked to simplify the expression

in order to that we first bring the like terms together

like terms are those having the same variable or same combination of variables with exactly same degrees

Hence it would be like

3a^2-4a^2+9ab-4ab+5+3

now we simplify the like terms

3a^2-4a^2=-4a^2

9ab-4ab=4ab

5+3=8

Hence

3a^2-4a^2+9ab-4ab+5+3=-4a^2+4ab+8

4 0
4 years ago
Read 2 more answers
Find the value of 7x+2y when x=2 and y=-9
Nostrana [21]
Answer = -4

Step-by-Step Explanation:

Given: x = 2, y = -9

Therefore, substituting the values
= 7x + 2y
= 7(2) + 2(-9)
= 14 + -18
= 14 - 18
= -4
6 0
3 years ago
Read 2 more answers
Given right triangle A w/a hypotenuse length of 3y + x and a leg of y-x, and right triangle B, w/ a hypotense length of y+5 and
Darya [45]
We use the law of correspondence that is 
Hypotenuse = Hypotenuse Leg = Leg 

3y + x = y + 5 
and 
y - x = x + 5 --------------------------------- work on your first problem to find x 
x = -2y + 5 
now you can plug this in to your second equation to sub in for the x 
y - ( -2y + 5 ) = ( -2y + 5 ) + 5 y + 2y - 5 = -2y + 10 3y - 5 = -2y + 10 5y = 15 y = 3 
Now you can plug back in to solve for x 

3y + x = y + 5 3(3) + x = (3) + 5 9 + x = 8 x = -1 
so y = 3 and x = -1
4 0
4 years ago
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