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seropon [69]
3 years ago
10

Solve the system of linear equations by elimination. x+4y=1 3x+5y=10

Mathematics
2 answers:
laiz [17]3 years ago
6 0

Answer:

x = 5 , y = -1

Step-by-step explanation:

Solve the following system:

{4 y + x = 1 | (equation 1)

5 y + 3 x = 10 | (equation 2)

Swap equation 1 with equation 2:

{3 x + 5 y = 10 | (equation 1)

x + 4 y = 1 | (equation 2)

Subtract 1/3 × (equation 1) from equation 2:

{3 x + 5 y = 10 | (equation 1)

0 x+(7 y)/3 = -7/3 | (equation 2)

Multiply equation 2 by 3/7:

{3 x + 5 y = 10 | (equation 1)

0 x+y = -1 | (equation 2)

Subtract 5 × (equation 2) from equation 1:

{3 x+0 y = 15 | (equation 1)

0 x+y = -1 | (equation 2)

Divide equation 1 by 3:

{x+0 y = 5 | (equation 1)

0 x+y = -1 | (equation 2)

Collect results:

Answer: {x = 5 , y = -1

Basile [38]3 years ago
6 0

Answer:\mathrm{Range\:of\:}\frac{10-x}{52x+5}:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)<-\frac{1}{52}\quad \mathrm{or}\quad \:f\left(x\right)>-\frac{1}{52}\:\\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:-\frac{1}{52}\right)\cup \left(-\frac{1}{52},\:\infty \:\right)\end{bmatrix}

Step-by-step explanation:\mathrm{Domain\:of\:}\:\frac{10-x}{52x+5}\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:x<-\frac{5}{52}\quad \mathrm{or}\quad \:x>-\frac{5}{52}\:\\ \:\mathrm{Interval\:Notation:}&\:\left(-\infty \:,\:-\frac{5}{52}\right)\cup \left(-\frac{5}{52},\:\infty \:\right)\end{bmatrix}

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Which equation represents the line that is perpendicular to y = 1/4 and passes through (-6,-9)
cluponka [151]

Answer:

B

Step-by-step explanation:

y = \frac{1}{4} is the equation of a horizontal line parallel to the x- axis.

A line perpendicular to it will be a vertical line parallel to the y- axis with equation

x = c

where c is the value of the x- coordinates the line passes through.

The line passes through (- 6, - 9 ) with equation

x = - 6 → B

5 0
2 years ago
Marc ordered a rug. He gave a deposit of 30% of the cost and will pay the rest when the rug is delivered. If the deposit was $75
ra1l [238]

Answer: Marc still owes $175

Step-by-step explanation:

Let x represent the cost of the rug.

Marc ordered a rug and gave a deposit of 30% of the cost and will pay the rest when the rug is delivered. This means that the amount of money that he deposited

for the rug is

30/100 × x = 0.3 × x = 0.3x

If the deposit was $75, it means that

0.3x = 75

x = 75/0.3 = 250

The cost of the rug is $250

The amount that Marc still owes would be

250 - 75 = $175

6 0
3 years ago
An airplane leaves Los Angeles and travels five hours to New YorkCity. The return trip travels along the same route and takes si
finlep [7]

The distance of the plane flies between the two cities is 1,113.75  miles

The formula for calculating the distance travelled is expressed as:

D = vt where:

v is the speed

t is the time taken

Given the following:

v = 99mi/hr

Total time taken = 5hr + 6.25hr

Total time taken = 11.25hr

Get the required distance

Distance = 99mi/hr * 11.25hr

Distance = 1,113.75miles

Hence the distance of the plane flies between the two cities is 1,113.75  miles

learn more here: brainly.com/question/7245260

4 0
3 years ago
How did you get that answer j
gtnhenbr [62]

i answer the questions that relate to the lessons i've learned

6 0
3 years ago
If 9:x = x:4, then x is 6. <br><br> true or false
Sophie [7]
We subsituete

9:6=6:4
treat as fraction
9/6=6/4

9/6=3/3 times 3/2
6/4=2/2 times 3/2

3/2=3/2
this is TRUE
7 0
2 years ago
Read 2 more answers
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