solve using elimination method. show work -3×+4y=1 -4×+5y=-2​

Answers

Answer 1

Answer:

Multiply the first equation by 4 and the second equation by -3:

-12x + 16y = 4

12x - 15y = -6

‣ Add the equations:

‣ Solve for y:

y = -2

‣ Substituting y = -2 into the first equation, we get:

-12x + 16 ⋅ (-2) = 4

‣ Solve for x:

x = -3

‣ Solution:

x = -3, y = -2)

DUDE SORRY My first answer wrong, I'm a bit tired but here you go


Related Questions

The length of a rectangle is 5.4 cm more than 2 times the width. If the perimeter of the rectangle is 39.6 cm, what are its dimensions?
a. length = 4.8 cm; width = 15 cm
b. length = 15 cm; width = 4.8 cm
c. length = 15 cm; width = 10.2 cm
d. length = 4.2 cm; width = 10.2 cm

Answers

Answer:

Step-by-step explanation:

vdvfdvfdvfvfb fd

What is the x-intercept of the graph of Y= 4x-36

Answers

The x-intercept is -36.

y = 4x - 36
The y is your y-intercept.
The 4x is your slope. (4/1)
The -36 is your x-intercept.

The x - intercept of the line is at Point X(9, 0).

We have the following equation of a straight line -

y = 4x - 36

We have to find the x - intercept of the of this line.

What is the general equation of a straight line ?

The general equation of a straight line is as follows -

y = mx + c

where -

m - slope of line

c - intercept of line on y - axis.

According to the question, we have -

y = 4x - 36

Now, comparing this line with the general equation of line -  y = mx + c, we get -

m = 4

c = - 36

for the x - intercept of the line, substitute y = 0. We get -

0 = 4x -36

4x = 36

x = 9

Hence, the x - intercept of the line is at Point X(9, 0).

Refer to the graph attached for more clarity.

To solve more questions on Graphs of straight line, visit the link below -

brainly.com/question/27757761

#SPJ2

5. Mrs. Hilt's yard is 48 feet long and 39 feet wide. What's the area of Mrs. Hilt's back yard?

Answers

area = lw (length times width) so if we multiply 48 and 39 it'd be equal to

1872

Whoever answers 5 first gets brainliest

Answers

Instead of N use D in your question so the equation would be T(D)=6(D) and put in what day it is to get number of miles hope that helped

Answer this correctly with an explanation and I’ll give u brainalist + 10 points

Answers

Answer:

A because when you add the angles up it has to equal 180

Step-by-step explanation:

Answer:

A) ∠ABC and ∠DEF

Step-by-step explanation:

Supplementary angles add up to 180 degrees total. So if you take 180 and subtract 118 you get 62.

∠ABC = 62

∠DEF = 118

180 - 118 = 62

180 - 62 = 118

118 + 62 = 180

Pls help asap giving 10 points
Don’t mind the answer I accidentally clicked

Answers

Answer:

18.08 ft. (You were right congrats!)

Step-by-step explanation:

24 = b

217 = A

In this you are solving for h.

Formula for area of triangle = bh/2

Isolate h = 2 x A/b

2 x 217/24 = 18.08.

Answer:

The answer is 18.08 thanks for the points

If y varies inversely with x
and y is 10 when x is 5,
then what is y when x is 2?

Answers

9514 1404 393

Answer:

  25

Step-by-step explanation:

Inverse variation means ...

  y = k/x

For the given values, we can find k to be ...

  k = xy = (5)(10) = 50

Then for x=2, we have ...

  y = 50/x

  y = 50/2

  y = 25 . . . when x=2

Pls help extra points and mark brainlist o

Answers

Answer:

A.

Hope that helps!

Step-by-step explanation:

Answer:

A. 3x = 6

Step-by-step explanation:

I hope this can help!

Have a nice day!

Solve for x. Leave your answer in simplest radical form

Answers

Answer:

x = sqrt(39)

Step-by-step explanation:

Let y = common side of the two triangles.

Upper right triangle:

6^2 + y^2 = 10^2

y^2 = 100 - 36

y^2 = 64

y = 8

Lower left triangle:

5^2 + x^2 = 8^2

x^2 = 64 - 25

x^2 = 39

x = sqrt(39)

What is the diameter of a sphere with a volume of 616 ft", to the nearest tenth of a
foot?

Answers

Answer:

Rounded to the nearest tenth: 10.6

Answer not rounded: 10.56

Step-by-step explanation:

ِAny thoughts? 15 points for anyone that solves it

Answers

Answer:

The way i solved it i got {In5, -n1} (not sure of my answer but I hope it helps)

Give me 2 animals read the direction THX FOR THE PEOPLE THAT WANNA HELP

Answers

Answer:

sssssssssssssssssssssssscscscs

Step-by-step explanation:

Seminar Explanation: Or if they like teaching, then to move to a high-class school to teach where the staff and co-workers are friendly, and where the pay is good.

John has $12. Tony has twice as much as John. Eric has $4 less than Tony. How much money does Eric have?​

Answers

Answer:

$20

Step-by-step explanation:

John=$12

Tony=$24

Eric=$20

multiply 12 by 2 to get Tony's money then subtract 4 for eric's money

Answer:

20

Step-by-step

Tony : 24

Eric : 24 - 4

Answer : 20

hello please help 50 points and brainliest!!!

Answers

Answer:

sorry the image is not clear

pls pls pls pls helpppp

Answers

troy could buy 18 baseball cards

Answer:

he can buy 18 baseball cards

What is the difference between a square and a rectangle?

a
A rectangle has equal sides and a square does not.
b
A square has congruent sides and a rectangle does not.
c
A square has 4 right angles and a rectangle does not.
d
A rectangle has 4 right angles and a square does not.

Answers

Answer:

B is the answer

Step-by-step explanation:

Have a great day!

16fy
What is the rate of change of the function shown on the
graph? Round to the nearest tenth.
14
12-
(2.12.5)
02.00
0 2.50
5.25
10 -
000
0 10.50
(1,5)
4
(-1,0.8) 3 (0, 2)
-4 -3 -2
12
3
4
X
2.
-4
-6

Answers

Answer:

?????????????????????????????????

Answer:

B

Step-by-step explanation:

Please help!
Given the figure is a square, find x, y and z

Answers

Answer:

Step-by-step explanation:

Did u find it? Because I can’t figure it out euther

If one movie ticket cost $15, how much will 5 movie tickets cost

Answers

Answer:

$75

Step-by-step explanation:

15 x 5 = 75

trust me bro :)

A block of wood 4 cm on each side has a mass of 40 g. What is the density of the block?

Answers

Answer:

the density of the block would be 10 g/cm^3

What is a irregular concave polygon

Answers

Answer:

An irregular polygon is any polygon that is not a regular polygon. It can have sides of any length and each interior angle can be any measure. They can be convex or concave, but all concave polygons are irregular since the interior angles cannot all be the same.

Step-by-step explanation:

FASTTTTTTTTTTTTTTTTTTTTTT 50 POINTS +BRAINLIEST

Answers

Answer:

[tex]\huge\boxed{\sf Option \ 2}[/tex]

Step-by-step explanation:

[tex]\sf (\frac{4}{5})^3 \\\\[/tex]

This means that 4/5 repeats itself 3 times.

So,

[tex]\sf = \frac{4}{5} * \frac{4}{5} * \frac{4}{5} \\\\= \frac{64}{125} \\\\\rule[225]{225}{2}[/tex]

Hope this helped!

~AH1807

Answer: Choice 2: 4/5 • 4/5 • 4/5 = 64/125

Step-by-step explanation: The exponent tells you how many times you have to multiply the 4/5. Since the exponent is 3, we know to multiply 4/5 with itself 3 times, like this: 4/5 • 4/5 • 4/5, which will get us 64/125

can u answer this please​

Answers

Answer:

Check pdf

Step-by-step explanation:

what is the area of the figure above ?

Answers

Answer:

256m^2

Step-by-step explanation:

you can cut up the figure.

A1=bh

A1= 24x8

A1=192m^2

A2=bh

A2= bh

A2=8x8

A2=64m^2

A1+A2= Atotal

A=192+64

A=256m^2

Nielson Media Research wants to estimate the mean amount of time (in minutes) that full-time college students spend watching television each weekday. Find the sample size necessary to estimate that mean with a 15-minute sampling error. Assume 96% confidence level is desired. Also assume that a pilot study showed that the standard deviation is estimated to be 112.2 minutes.

Answers

Answer:

The sample size necessary is 237.

Step-by-step explanation:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.96}{2} = 0.02[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.02 = 0.98[/tex], so Z = 2.056.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

Find the sample size necessary to estimate that mean with a 15-minute sampling error.

A sample size of n is necessary.

n is found when [tex]M = 15[/tex]

We have that [tex]\sigma = 112.2[/tex]

So

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

[tex]15 = 2.056\frac{112.2}{\sqrt{n}}[/tex]

[tex]15\sqrt{n} = 2.056*112.2[/tex]

[tex]\sqrt{n} = \frac{2.056*112.2}{15}[/tex]

[tex](\sqrt{n})^2 = (\frac{2.056*112.2}{15})^2[/tex]

[tex]n = 236.5[/tex]

Rounding up,

The sample size necessary is 237.

14 out of 49 as a percentage

Answers

Answer:

28.57%

Step-by-step explanation:

What is the area of the parallelogram?

A parallelogram with base of 20 centimeters, height of 15 centimeters, and side length 21 centimeters.
82 centimeters squared
300 centimeters squared
315 centimeters squared
420 centimeters squared

Answers

Answer:

300 centimeters squared.

Step-by-step explanation:

Given that a parallelogram has a base of 20 centimeters, a height of 15 centimeters, and a side length 21 centimeters, to determine the value of its area, the following calculation must be performed:

Area = Base x Height

Area = 20 x 15

Area = 300

Thus, the area of the parallelogram is 300 square centimeters.

help me lol .......................

Answers

Answer:

dang I think its 5 I hope it is

Answer: j > 5

-

Step-by-step explanation:

Sorry it wouldn’t let me put it with the line

A small bucket holds 75% as much as a large bucket.If the small holds 36 units,how much does the large hold?​

Answers

Answer:

48

Explanation:

36÷75=

0.48

3. If a+b=c, then what is the average value of a,b are c?

Answers

Answer:

The average value of a, b and c is [tex]\frac{2c}{3}[/tex]

Step-by-step explanation:

Average value:

Sum of all values by the number of values.

In this question:

3 values, a, b and c.

We have that:

[tex]A = \frac{a+b+c}{3}[/tex]

Since [tex]a+b = c[/tex]

[tex]A = \frac{a+b+c}{3} = \frac{c+c}{3} = \frac{2c}{3}[/tex]

The average value of a, b and c is [tex]\frac{2c}{3}[/tex]

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