Solve the simultaneous equations
x + y = – 6
-x + 2y = 15

Answers

Answer 1

Answer:

x = -9, y = 3

Step-by-step explanation:

I hope it helps!


Related Questions

umm i have an answer but not sure help

Answers

Answer:

tan A = 8/15

sin A = 8/17

cos A = 15/17

Step-by-step explanation:

Follow "SOH-CAH-TOA"

SOH---> sin A = (opposite of the angle mentioned) / hypotenuse

CAH---> cos A = (adjacent of the angle mentioned) / hypotenuse

TOA---> tan A = (opposite of the angle mentioned) / (adjacent of the angle mentioned)

Note: Hypotenuse is the side opposite of 90° of a right-angled triangle.

Help me please!
Mathematics

Answers

Answer:

x=12

Step-by-step explanation:

i'm assuming the numbers are the lengths of each segment. 8/24 = 1/3, so 4/x=1/3, cross multiply to get x=12

Help Please. It's 10:11 AM right now. This due by 12 PM or in 2 more hours. I don't know this.

Answers

Answer:

B) 2,000.

Step-by-step explanation:

As the mean is 6000 the total number of students = 5*6000

= 30,000.

If graduates are excluded we have 4*7000 = 28,000 students.

So the number at graduate level

=  30,000 - 28,000

= 2,000.

Please help me!!!!!!!!!!! Find the coordinates of P scale factor of 3

Answers

Answer:

  P'(3, -12)

Step-by-step explanation:

Assuming we're dilating the figure by a factor of 3 using the origin as the center of dilation, the coordinates of P' will be 3 times those of P:

  P' = 3P

  P' = 3(1, -4)

  P' = (3, -12)

x=2y=-1
-5x-9y=2
elimation

Answers

Answer:

Step-by-step explanation:

We know x=2y=-1

So -5x-9y=2

<=> -5(1) +(-4)(1) - (y) =2

<=> -9- (y)=2

<=> y=-9-2

<=> y=-11

P/s: -9y= -8y-y = -4x-y = (-4)(1)-y

ok, i'm done. Thank to me :>

According to the Rational Root Theorem, the following are potential roots of f(x)=9x2−3x−2.1,
−1,23,19
Which is an actual root of f(x)?

Answers

Step-by-step explanation:

9x2 -3x -2 factors to (3x-2)(3x +1)

solve 3x-2 =0 and 3x+1=0

making the roots -1/3 and 2/3

which statement is correctly written as a conditional statement ​

Answers

Answer:

a shape has four sides,or it is a quadrilateral

find the dimensions of the right circular cylinder of maximum volume that can be inscribed in a sphere of radius a

Answers

Answer:

d.

took the test

Step-by-step explanation

Simplify the expression 8h + (-7.7d) -14 + 5d - 2.4h.

Answers

Answer:

8h - 7.7d - 14 + 5d - 2.4h

5.6h - 2.7d - 14

Answer:

8h+-7.7d-14+5d-2.4h

Combine -7.7d and 5d to get -2.7d.

8h-2.7d-14-2.4h

Combine 8h and -2.4h to get 5.6h.

5.6h-2.7d-14

Step-by-step explanation:

id k

A line passes through the point (-8, 3) and has a slope of 3/4 write an equation in slope intercept form

Answers

Im thinking 9. If i did the math correctly. You should try 9

It is normal for some newborn babies to lose weight in their first week of life. Baby Todd's birth weight was 10 pounds. One week after being born, he is 10% lighter. What is Todd's current weight? pounds​

Answers

Answer:

9 pounds

Step-by-step explanation:

you can use cross multiplication to find 10percent of 10 pounds, then subtract this from 10 pounds

(-5,1) and (-5,4) what is the slope of the line that passes through the given points

Answers

Answer:

Undefined

Step-by-step explanation:

I always like to take a good look at the points before I go about solving for the line. To me, it looks like this is going to be a vertical line. Why do I think that? Well, for each point, the x-value is -5. Since this is a linear function, every other point must also have an x-value of -5. So, our line would be straight up and down, going through the x-intercept (-5, 0). Let's try out this theory by subtracting our y-values and then our x-values, then dividing:

[tex]\frac{4-1}{-5-(-5)} =\frac{3}{-5+5} =\frac{3}{0}[/tex]

And that makes sense! Functions that show up as vertical lines are undefined, since their slopes always have 0 as a denominator, and anything divided by 0 turns out to be undefined. So, that's our answer - the slope is undefined.

Hopefully that's helpful! :)

Answer:

undefined

Step-by-step explanation:

(-5, 1) and (-5, 4) lie on the same vertical line.

A vertical line has undefined slope.

Answer using seconds please!!!

Using my faucet, it takes 6 minutes to fill our water tank.

Using the neighbour’s hose, it takes 9 minutes.

How long would it take if I used both the faucet and the hose?

Answers

Answer:

900 seconds I believe

Step-by-step explanation:

60*6= 360

9*60=540

540+360=900


Select the true statement about triangle ABC.

O A. sin A = cos B
O B. sin A = tan c
C. sin A= sin C
OD. sin A = cos C

Answers

Answer:

A=cos C

Step-by-step explanation:

mass–energy equivalence formulpa E

Find the value for each variable.

Answers

Step-by-step explanation:

3x=21

x=21/3 = 7.

hope this helps.

help me
[tex] \: [/tex]

A C E isoscles ACAR is inscribed in o E If mCR = 1300 Find:
11.m CAR
12. mACR
13. mARC
14. mAC
15. mAR

[tex] \: [/tex]

marking brainlist
with explanation
I will report nonsense answer
need properly answer


[tex] \: [/tex]

Answers

Answer:

#11m∠CAR = (1/2)mCR = (1/2)(130°) = 65°#12 and #13m∠ACR = m∠ARC = 1/2(180° - 65°) = (1/2)(115°) = 57.5° #14 and #15mAC = mAR = 2(m∠ACR) = 2(57.5°) = 115°

Ilana ran 2 laps around the field in 8 minutes. What was her average speed, in laps per minute?
O 10 of a lap per minute
1
O of a lap per minute
O 4 laps per minute
10 laps per minute
How many laps?

Answers

Answer: She ran 0.25 laps a minute

Step-by-step explanation:

Every minute she runs 0.25 a minute which means that every 4 minutes she runs 1 lap which means if she run for 8 minutes she gets 2 laps

Answer:

?

Step-by-step explanation:

what does the O mean

How do you give Brainliest?

Answers

Answer:

You press a little crow looking thing on the bottom of the persons answer

Step-by-step explanation:

Brian invests £7500 into his bank account.
He receives 6% per year compound interest.
How many years will it take for Brian to have more than £10000?

Answers

Answer:

5 years

Step-by-step explanation:

40 PTSS GUYS PLEASE DO THIS PROBLEM ILL GIVE BRAINLIST TOO!

Answers

Answer:

where are the problem?

Step-by-step explanation:

sorry no problem

-2r+11=13 2r=2 r= I need help

Answers

Answer:

-2r = 2 - Subtract 11 from both sides

r = -1

A principal of $4300 is invested at 3% interest, compounded annually. How much will the investment be worth after 5 years?
Use the calculator provided and round your answer to the nearest dollar.

Answers

Answer:

You would have 4945 dollars in 5 years.

Step-by-step explanation:

First we look for what 3% of 4300 is

After we find it we have 129 dollars

Every year we gain 129 dollars for 5 years

129 · 5 = 645

Now we add :         4300 + 645 = 4945 dollars after 5 years

If 3x 6 = 213x plus 6 equals 21, what does x 2x plus 2 equal?.

Answers

Answer:

17

Step-by-step explanation:

hope this helped

Find the value of x-5 when x= 15

Answers

Answer:

15 - 5 = 10 wow that was so hard

Answer:

the awnser is 10

Step-by-step explanation:

x=15 so

15-5=10

help.......................................................

Answers

Answer:

Down here ↓↓↓↓↓↓

Step-by-step explanation:

Anything below 1 is a reduce

Anything above 1 is an enlarge

Anything equal to 1 is a preserve

1. Reduce, 0.75 < 1

2. Reduce,  4/5 < 1

3. Enlarge,  4.2 > 1

4. Preserve, 8/8 = 1

5. Enlarge, 7/2 > 1

6. Preserve, 1 = 1

7. Reduce, 0.1 < 1

8. Enlarge, 1 2/3 > 1

9. Enlarge, 12 > 1

-Chetan K

help help help help Please ​

Answers

Answer:

It rises -4 and runs 6

Step-by-step explanation:

So the slope is -4/6


Find the equation of this line.
(0,1)
(-3,0)|
y =
x+

Answers

Answer:

y = 1/3x +1

Step-by-step explanation:

y intercept is 1 and the rise is one with a run of 3

Five players are given $10 each and asked to contribute any portion of it to a group account. They are also told that the total collection will be doubled and distributed equally among each of them. In this case, the players are likely to contribute __________.

Answers

Answer:

nothing

Step-by-step explanation:

The owner of a retail store is tracking his inventory for an annual report. The graph shows the remaining Inventory for a particular item and the
number of days that have passed since the stock was replenished.

Which type of function best models the relationship between the number of days and the inventory remaining?

Answers

Answer:

y = -2.8x +69.4

Step-by-step explanation:

Let y represent units of inventory, and x represent days since the last replenishment. We are given points (x, y) = (3, 61) and (13, 33). The line through these points can be described using the 2-point form of the equation of a line:

... y -y1 = (y2-y1)/(x2 -x1)(x -x1)

Filling in the given point values, we have ...

... y -61 = (33 -61)/(13 -3)(x -3)

Simplifying and adding 61, we get ...

... y = -2.8x +69.4

The linear function which best models the relationship between the number of days and remaining inventory is [tex]y = \frac{-35}{12}x + \frac{50}{3}[/tex] .

What is linear function?

A linear function refers to when the dependent variable (usually expressed by 'y') changes by a constant amount as the independent variable (usually 'x') also changes by a constant amount.

According to the given equation

We have a graph which shows the remaining inventory.

In which x represents the number of days and y represents the inventory remaining.

Let y = mx + b be the linear function which represents the relationship between the number of days and the inventory remaining.

Form the given graph if we choose two points (14, 30) and (2, 65) for finding the value of m and b.

Substitute y = 30 and x = 14 in y = mx + b

⇒ [tex]30 = m(14) + b...(i)[/tex]

Similarly,

substitute y =65 and x =2 in y = mx + b

⇒[tex]65 = 2m + b..(ii)[/tex]

From equation (i) and (ii)

[tex]m = \frac{-35}{12}[/tex]

and [tex]\frac{50}{3}[/tex]

Therefore, [tex]y = \frac{-35}{12}x + \frac{50}{3}[/tex]

Hence, the linear function which best models the relationship between the number of days and remaining inventory is [tex]y = \frac{-35}{12}x + \frac{50}{3}[/tex] .

Learn more about linear function here:

https://brainly.com/question/21107621

#SPJ2

A mixture of green paint contains 9 pounds of blue paint and 12 pounds of yellow paint to make the same shade of green paint using 21 pounds of blue paint how much yellow paint would you need

Answers

I’m not too sure, I tried dividing 21 by 9 which then I got 2.3333 so then I multiplied that and 12 and got basically 28
Other Questions
7. Add [-6-2 2] + [-3 2 1].A. [-9-3-5]B. [-3 0 3]C. [-6 0 3]D. [-9 0 3] write the function of these in your body. carbohydrates, protein, vitamin don't add links please. Suppose a population is of size N is 1,000,000. Compute the correction factor for the SE of the sample mean, when the sample size, n, is equal to 1,000; 10,000; and 100,000. explain the role of foreign employment in the economic of country. how do you read real life graphs? How has the Service Flag changed over time? Select all the equations that have {6} as its solution set. 15x=54x8+3x=6x10x2+2=7x4434x=3x1 A scrapbooking store is selling rubber stamps for four dollarsand $4.95 each. The total sales F(n) is a function of the number of rubber stamps n soldA. Identify the independent and dependent variablesB. What values of the domain and range make sense for this situation? explainC. Write a function to represent the total sales. Then determine the total sales for five stamps help me pleaseonly the 22. (c) who uses brainly to study? I thought we were all here to cheat on tests. but the ads say diffrent Which side is hypertonic ? A or B ? Which side will gain water What is c ? Write the equation of the line that passes through (-2, 4) and is perpendicular to x = 3. Shawn has $20.00 to spend. He wants to save $5.00. He buys two ice creams for $1.65 each, what is the maximum number of packets of chocolate can he buy at a cost of $3.45 for each packet and still have at least $5.00 left over(solve as an inequality) When individuals apply certain standards that are the standards set by others, such as by parents or the government, they are at the __________ level of moral reasoning. What is the of the passage Solve for r.4r+10>671 pointsHelp Plslsspsl sWhy was the idea of "taxation without representation" soimportant to the revolutionary cause?A.Colonists believed that Great Britain should tax only certain items.B.Great Britain would have ended taxation if colonists had kept thepeace.C.Colonists believed King George III had abused his pqwer by taxingthem without their consent.D. Great Britain taxed the colonists only to force them into war. There should be 2 paragraphs in this text. Select where the second paragraph begins.This upcoming half-term trip is to go and see the smash-hit show "Die Hard: The Musical" at the Palace Theatre in London. The show features Clive Owen in the lead role of wisecracking hero John McClane, with Tom Hardy as the slick, super-villain Hans Gruber. Tickets, travel and lunch will cost 25, and students wishing to join the trip must sign up by the end of this week. Although priority will be given to students, college staff are encouraged to sign up for the trip and fill any remaining spaces. Imagine yourself making a nice cup of tea on a cold winter day. You begin by boiling some water in a kettle. Next, you add the steaming liquid to your cup. Then, you open a tea bag and repeatedly dunk it into the water. You pour a dash of milk and drop a few sugar cubes into the cup, stirring the solution with a spoon. Finally, you squeeze a bit of lemon into your tea mixture. However, before you have time to stir the lemon juice into your tea, the liquid forms clumps. In other words, your tea has curdled! Based on the scenario, answer the questions below.Which of the four indicators of a chemical change is described in the paragraph above?What makes the tea with milk and lemon curdle? Name some of the chemical substances in the tea mixture. (You will need to conduct some research on your own to do this.) Which chemicals could have reacted to cause the curdling?