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3 years ago

14

Solve for x(only)for the following system of equations using Cramer's rule.

1 answer:

Sphinxa [80]3 years ago

4 0

1st answer: x= -7/2 -5/4y + 1/2z
2nd answer: x= 6 + 1/7y -2/7z
3rd answer: x= 28/3 -1/3y -4/3z

Steps
4x + 5y -2z = -14
Move variables to the right
4x = -14 -5y +2z
Divide both sides by 4
X= -7/2 -5/4y +1/2z
Answer
X= -7/2 -5/4y +1/2z

7x -y +2z =42
Move variables to the right
7x = 42 +y -2z
Divide both sides by 7
X= 6 + 1/7y -2/7z
Answer
X= 6 + 1/7y -2/7z

3x +y +4z = 28
Move variables to the right
3x =28 -y -4z
Divide both sides by 3
X= 28/3 -1/3y -4/3z
Answer
X= 28/3 -1/3y -4/3z

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steposvetlana [31]

Answer: 1.05 • 103.1 - 2.06

Step-by-step explanation:

to simplify get rid of the parenthesis. to simplify further you could subtract 1.05 and -2.06 and make the equation -1.01 • 103.1

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3 years ago

Laura went to a golf shop that has a golf simulator. The simulator estimates the distance that each ball she hits would have gon

Alex_Xolod [135]

Answer:

I can only help you with Part C and E as these two are the ones I am able to answer.

Part C: slopes are not the same

Part E: 195 yards

Step-by-step explanation:

Part C:

Part E: The slope of the line follows a linear pattern; therefore, find the equation for the line by calculating the slope and plugging in a point.

Slope:

y2-y1/x2-x1; (9, 105) (8,115)

(115-105)/(8-9) = -10; the slope is -10, now solve for the equation of the line.

y=mx+b; plug in the point (9,105)

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2 years ago

Help me please math

Dominik [7]

13+9=22

5+18=23

22x23=506

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2 years ago

What is the invers function of f(x)=(n+1)^3?

zimovet [89]

Answer:

$f^{-1}(x)=\sqrt[3]{x}-1$

Step-by-step explanation:

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2 years ago

The actual length of side y is 22cm. Use the scale drawing to find the length of side x.

kozerog [31]

Given:

The actual length of side y is 22cm.

To find:

The length of side x by using the scale drawing.

Solution:

We know that the corresponding sides of original figure and scale drawing are proportional.

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$x=\dfrac{22}{1.4}\times 1.8$

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