−x+3y=−15, 3x+3y=21 elimination

Answers

Answer 1

Answer: x= - 6/7, y= - 129/12

Explanation:

use the addition/elimination method to solve for x. then sub in and test then lastly, multiply everything by 7 to eliminate the fraction


Related Questions

An equilateral triangle has a perimeter of 24 centimeters. If the triangle is dilated by a factor of 0.5, what is the length of each side of the new triangle?

Answers

Answer:

4

Step-by-step explanation:

To find the side length of the original triangle:

24/3=8 (because it is an equilateral triangle).

Because the triangle is dilated by a factor of 0.5 and the triangle is equilateral, the side lengths of the new triangle is

8*0.5=4

(-2,19)(10,-11) find the slope

Answers

Answer:

-5/2

Step-by-step explanation:

Slope = [tex]\frac{y_{2}-y_{1}}{x_{2}-x_{1}}\\\\[/tex]

         [tex]= \frac{-11-19}{10-[-2]}\\\\=\frac{-30}{10+2}\\\\=\frac{-30}{12}\\\\=\frac{-5}{2}[/tex]

PLEASE HELP IMMIDEATIALY BFHBGDWAHDW

Answers

Answer:

zeros and AoS

Step-by-step explanation:

zeros, x = (1 , -7)

AoS:x =-1

Libby earns $10 each hour for babysitting. Let m = the money she earns, and t = the time in hours she is babysitting. What equation represents this proportional relationship?

Answers

Answer:

$10t=m

Step-by-step explanation:

If for each hour is $10.

She would earn the number of  hours times $10.

Example: She did babysitting for 4 hours this weekend. The equation is $10(4)=m or $10 x 4 = m.  m=40

The table below represents a linear function. Identify the rate of change of the function.

Answers

Answer:

the function is f(x) = 7/4x - 2

therefore the average rate of change is 7/4

how to write "The product of a number and -2 increased by 10"? ​

Answers

(x•-2)+10 I’m pretty sure
Possible ways

2(x) + 10

x • 2 + 10

x(2) + 10

Ms. Lynette earns $19.50 an hour when she works overtime. She worked overtime twice this week. One day she worked 3 hours of overtime. Her total overtime pay for the week is $146.25.

Write an equation to find the number of overtime hours she worked on the second day.

Answers

(19.50*3)+(19.50*x)=146.25

Answer:

4 1/2 hours

Step-by-step explanation:

Equation(s):

--

(146.25 - (19.50 x 3)) ÷ 19.50 =

4.5 or 4 1/2 hours

--

#LFM #Brainly

What is the postulate?

Answers

Step-by-step explanation:

Blank #1 STQ

Blank #2 SSS (Side-Side-Side)

Plzzzz brainlest I swear

Answers

Answer: 8

Step-by-step explanation: on the left chain, there are 5 4’s, so 4 times 5 is 20 Because you know that, subtract it from 60 to only have the W’s values. So 60-20 is 40 and because there is 5 w’s do 40/5 is 8. Therefore, the value of the w’s is 8 and the value of the 4’s is 20

Answer:

1024.

Step-by-step explanation:

4x4x4x4x4= 1024

I hope this is correct and I hope this helps. My apologies if it´s wrong.

Identify the best measure of Sin C

Answers

Answer:

[tex]\sin C=\frac{28}{35}[/tex]

Step-by-step explanation:

In a right triangle, [tex]\sin\theta =\frac{\text{opp}}{\text{hyp}}[/tex]. In this case, the side opposite to angle [tex]C[/tex] is 28 and the hypotenuse is 35. Therefore, the exact value of [tex]\sin C[/tex] is [tex]\boxed{\frac{28}{35}}[/tex].

In triangle PQR, the angles are in the ratio 2 : 3 : 4. Find all the angles (urgent)

Answers

Answer:

40°, 60° and 80°

Step-by-step explanation:

sum the parts of the ratio, 2 + 3 + 4 = 9 parts

Divide 180° ( sum of angles in a triangle) by 9 to find the value of one part of the ratio.

180° ÷ 9 = 20° ← value of 1 part of the ratio , then

2 parts = 2 × 20° = 40°

3 parts = 3 × 20° = 60°

4 parts = 4 × 20° = 80°

The angles in the triangle are 40°, 60°, 80°

The altitude to the hypotenuse of a right triangle divides the hypotenuse into 15 inches and 30 inch segments. Explain or show how to find the exact length of the altitude including the correct value. Then explain or show how to find the length of each leg including the correct values.

Answers

9514 1404 393

Answer:

  CX = 15√2 inches

  BC = 15√3 inches

  AC = 15√6 inches

Step-by-step explanation:

In this geometry, all of the triangles are similar:

  ΔABC ~ ΔACX ~ ΔCBX

Corresponding segments are proportional in similar triangles, so we have ...

  AX/CX = CX/BX = (long leg)/(short leg)

Filling in the numbers, we get

  30/CX = CX/15

  CX² = 15×30

  CX = 15√2 . . . . . exact length of the altitude (inches)

__

Similarly, we can form proportions with the legs:

  AB/BC = CB/BX

  BC² = (BX)(AB) = (45)(15)

  BC = 15√3 . . . inches

and

  AC/AB = AX/AC

  AC² = (AX)(AB) = (30)(45)

  AC = 15√6 . . . inches

_____

Additional comment

You may notice that each of the segments we're interested in is the root of a product involving segments of the hypotenuse. This "root of a product" is called the geometric mean. Here, the three geometric mean relations are ...

  altitude = geometric mean of hypotenuse segments

  short side = geometric mean of short segment and whole hypotenuse

  long side = geometric mean of long segment and whole hypotenuse

__

Strictly speaking the geometric mean is the n-th root of the product of n items. Here, there are only 2 items, so it is the square root of their product.

Find the total surface area of this cuboid 4cm 2cm 5cm

Answers

Answer:

76cm²

Step-by-step explanation:

SA=2lw+2lh+2hw

length=4cm

width=2cm

height=5cm

= 2(4×2+4×5+5×2)

=8+20+10

=2×38

=76cm²

Aaron buys a game for $25.00 and has to pay $2.00 for tax. What is sales tax rate?

Answers

Answer:

$12.50

Step-by-step explanation:

divide

4. Which of the following equations can give an estimated product of 224?
A. 2.54 x 6.85
C. 14.04 x 15.61
B.10.6 x 5.8
D. 17.6 x 16.9​

Answers

So the answer is 14.04* 15.61 it gives an answer of product 224

A side of the triangle below has been extended to form an exterior angle of 116. Find the value of x

Answers

Answer:

[tex]x=64 \textdegree[/tex]

Step-by-step explanation:

From the question we are told that

Angle of extension [tex]y=116 \textdegree[/tex]

Generally the angle formed at x is mathematically given as

[tex]x=180-116[/tex]

[tex]x=64 \textdegree[/tex]

Answer:

26°

Step-by-step explanation:

A side of the triangle below has been extended to form an exterior angle of 116°. Find the value of xx.

The answer is 26° i tried 64 and it was incorrect.

Select all expressions that describe the expression 2 + 5Y
A) 1 plus 5 plus Y
B) 2 plus 5 times a number Y
C) 2 plus the product of 5 and a number Y
D) The sum of all the numbers times Y
E) the sum of 2 and 5Y
F) 2 plus Y plus Y plus Y plus Y plus Y plus Y

Answers

Answer i think b, and f.

Step-by-step explanation:

Let me know if i am wrong.

Ya B and F sounds good to me

Find the sale price of the item. Round to two decimal places if necessary.


Original price: $85.00


Markdown: 34%


The sale price is

Answers

34% of 85 would be 28.9 so the price would be 56.1 :)

A pair of listening posts is 4,000 ft apart. They both pick up a sound, but one listening post records the sound 1.5 seconds after the other listening post. Assume sound travels at 1,100 ft/s. Which equation can be used to determine possible locations of the origin of the sound?

Answers

Answer:

its B

x^2/680,625 - y^2/3,319,375 = 1

The equation that be used to determine possible locations of the origin of the sound  [tex]\dfrac{ x^2}{680,625} - \dfrac{ y^2}{3,319,375 }= 1[/tex]

What is a system of equations?

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

A pair of listening posts is 4,000 ft apart.

They both pick up a sound, but one listening post records the sound 1.5 seconds after the other listening post.

Assume sound travels at 1,100 ft/s.

The equation would become

[tex]\dfrac{ x^2}{680,625} - \dfrac{ y^2}{3,319,375 }= 1[/tex]

Learn more about equations;

https://brainly.com/question/27056029

#SPJ2

pls help need it ASAP

Answers

Answer:

D

Step-by-step explanation:

2x>7

x>7/2

x>3.5

Answer:

D

Step-by-step explanation:

Have a day as amazing as you are :D

a car leaves a stoplight and accelerates 15 seconds, and its speed reaches 60 km/hr. how fast did this car accelerate during this time?

Answers

Correct me if I’m wrong but isn’t it 0.25km

• 1.Find the scale factor of a blueprint if the scale is 3 inches = 6 feet.
A. 1
B. 24
C. 3
D. 72

Answers

Answer:

B

Step-by-step explanation:

Answer: B. 24 (as a fraction: 1/24)

which expression is equivalent to 3x -5?​

Answers

Answer:

3x - 5 = 3x + (-5)

Step-by-step explanation:

Anyone that answers this right will get 100+ points, any wrong answers or spamming will be reported.

Answers

Answer:

na

Step-by-step explanation:

ez I did this in 3rd grade

i’ll give brainliest, just help me please : )

Answers

Parallelogram Area = bh = 5.5(24) = 132
Rectangle Area = lw = 24(6.5)= 156

Just add them up to get 288cm squared :)

Lisa works as a waitress. The data set below shows Lisa's daily gratuity income, in dollars, over 15 days of work. 90, 80, 85, 115, 55, 60, 97, 73, 70, 110, 112, 58, 92, 78, 100 Using a box plot, determine which of the following are true regarding the data set above. The data is skewed left. The data is skewed right. The data is symmetric. The IQR is 30. A. III only B. II and IV C. I and IV D. III and IV

Answers

Answer:

The data is symmetric.

The IQR is 30.

Step-by-step explanation:

Answer:

The data is symmetric.

The IQR is 30.

I need help ASAP!! can u do this? :)

Answers

The answer is 48 because you have to do is 21 x 4 which is 48
It’s 48...............

PLEASE HELP I NEED AN ESSAY AS SOON AS POSSIBLE OR ASAP!!!!!! WRITE A 10 - 20 SENTENCE ESSAY AND I WILL GIVE YOU 30 POINTS PLEASE HELP

Answers

Answer:

what does it need to be about?

Step-by-step explanation:

Just use part of the bee movie script

High School's track team won 8 meets and lost 2. What is the ratio of wins to the total number of track meets?

PLS I NEED THIS DONE QUICK.​

Answers

8:2
Or you could also say these
8 to 2
8/2

Sarah used 2.5 cups of cheese in a dish that serves 10 people. Amyn used 1.6 cups of cheese in a dish that serves 8. How much more cheese is in one serving of Sarah's dish?

Answers


0.5 cups of cheese

Amy: 1.6 divided by 8 = 0.2 cups of cheese per serving

Sarah: 2.5 divided by 10 = 0.25 cups of cheese per serving

0.25 - 0.2 = 0.5
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