Mathematics High School

what is the solution to the system of equations x-y=5 and 3x+7y=-5​

Answers

Answer 1

Answer:

Step-by-step explanation:

3(x-y)-3x-7y=3(5)-(-5)

3x-3y-3x-7y=15+5

-10y=20

y=-2, since x-y=5

x-(-2)=5

x+2=5

x=3

So the solution is the point (3,-2)

Related Questions

Help pppppppppppppppPPPPPPPP

Answers

Answer:

39

Step-by-step explanation:

if you square 15 and 36 you get

225+1296=1521

1521 square rooted is 39

Answer:

39

Step-by-step explanation:

15² +36² =1521

√1521 = 39

Help will mark Brainlest

Answers

I think it’s B have a good day

i really need help on this.​

Answers

Answer:

both are (0,0)

Step-by-step explanation:

Hello There!

When its asking for the vertical intercept its asking " at what points does the equation cross the vertical axis( y axis) so its pretty much asking for the y intercept¨

In the graph shown below the y intercept is 0 so the coordinates of the vertical intercept would be (0,0)

When its asking for the horizontal intercept its asking " at what points does the equation cross the horizontal axis ( x axis ) so its pretty much asking for the  x intercept."

In the graph shown below the x intercept is 0 so the coordinates of the horizontal intercept would be (0,0)

Help me with this!!!

Answers

Answer:

No

Step-by-step explanation:

The perpendicular bisector theorem wouldn't really work with it not being a clear right angle or perpendicular. But with HG being congruent with GJ, it would be easy to find the answer

Two apps launched on the same day. At the end of the first week, the number of visitors to each app was 25. For the first 6 weeks, the number of visitors to each app increased according to the following words. App A: The number of visitors doubles each week. App B: The number of visitors increased by 150 each week.

Answers

Answer:

i don't know the answer today I say tomorrow

What is the median of 90,97,85,72

Answers

Answer:

88

Step-by-step explanation:

the median is 88

the mean is 87.5

David earns 20% commission as a salesperson. He sold a hammock that cost $100. ​How much commission did David earn?

plz help

Answers

He earned $20 because 20% of $100 is $20

Please help and explain please. would appreciate it!Can someone please help and explain!

Answers

Answer:

x = 32 in

Step-by-step explanation:

8/34 = x/136

34x = 1088

x = 32 in

Mike 24 coins in nices and dimes they are valued at $2.05. how many DIMES does he have?​

Answers

Answer: He has 8 dimes

Step-by-step explanation:

Answer:

17 dimes

7 nickels

Step-by-step explanation:

n = number of nickels

d = number of dimes

0.10d + 0.05n = 2.05

n + d = 24, n = 24 - d

substitute for n:

0.10d + 0.05(24 - d) = 2.05

simplify:

0.10d + 1.20 - 0.05d = 2.05

0.05d = 0.85

d = 17

n = 24-17 = 7

There are 5 water bottles sold for $50. What is the unit price? Round to the nearest cent

Answers

Answer:

$50/5 bottles

$10 per bottle.

must be really good water!

Plz help i have to get this finished in 10 minutes and im having trouble

Answers

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

When you have a lot of similar problems to do, it can be worthwhile to let a spreadsheet or calculator do the repetitive calculations. The formula is given in your problem statement. All you have to do is put the numbers in and multiply. For total value, you add the interest to the principal.

6 months = 1/2 year

I need the answer pls

Answers

Answer:

B?

Step-by-step explanation:

I feel like the answer would be b but I'm not that good with fractions so don't choose my answer right away...

Determine two numbers whose sum is 9 and whose product is 20, by
solving a quadratic equation.

Answers

Answer:

4 and 5

Step-by-step explanation:

Ex: x^2-9x+20
(x-4)(x-5)=0
x=4 x=5

HELP WITH PLEASE! I’ll give you brilliance

Answers

Answer:

a:95

b: a=75

Step-by-step explanation:

For a:

The angles are supplementary meaning they add to 180º. So you can set up an equation: x + 85 = 180

Subtract 85 from both sides:

x = 95º

For b:

Since it's an isosceles triangle (2 congruent sides), the base angles are equal to each other. So a = 75º

write the equation of a line that is parallel to 2x-5y=-20 and passes through the point (7,6)

Answers

Answer:

I guess the answer is 0.4x+3.2=y (0.4 equals to 2/5 ) .

a rectangular playground has its length more than its breath by 2 m find the length and breadth of the playground if area of playground is 440 sq.m.​

Answers

Answer:

Length = 22m

Breadth = 20m

Step-by-step explanation:

Given:

Area = 440 m²

Let the breadth be x m

According to the question:

Length = (x+ 2) m

Area of a rectangle = length × breadth

Substitution the values of area, length and breadth

440 = (x+2) × x

440 = x² + 2x

x² + 2x - 440 = 0

x² + 22x - 20x - 440 = 0

x (x + 22) - 20 (x + 22) = 0

(x + 22)  (x - 20) = 0

x = -22 and 20

Since the value of breadth cannot be in negative, therefore the value of breadth will be 20 m.

Length = (x + 2)

⇒ 20 + 2

⇒ 22 m

Help i don't know what to do I will give brainiest

Answers

Answer:

The sum will be whichever number has the greater value.

Step-by-step explanation:

Let's say you have (-2) + 4 = ?

The number with the greater value is 4.

So the sum of your answer would be a positive, since the greater number has a positive sign.

Quiz Page 1 of 10 Question 1 (5 points) Saved r Question 1 options: measures the strength and variance of a linear relationship between two variables on a scatterplot. measures the strength and direction of a linear relationship between two variables on a scatterplot. measures the bias and direction of a linear relationship between two variables on a scatterplot. measures the complexity and direction of a linear relationship between two variables on a scatterplot. Question 2 (5 points) ______________ is a supervised method that has several classes for the categorical target variable. Question 2 options: Question 3 (5 points) A ________ plot determines whether the normality assumption has been met. Question 3 options: Page 1 of 10 1 of 30 questions saved

Answers

First of all if u want us to help them u should put the points to 10 so we can help u

PLS HELP (MARKING BRAINLIEST)

Answers

Answer:

there is a fraction calculator you can use

https://www.calculatorsoup.com/calculators/math/fractions.php

Step-by-step explanation:

Please help me solve this :((((

Answers

Answer:

Step-by-step explanation:

hello :

tangθ = 9.85/12.90

tangθ = 0.76

θ = tang-1(0.76)

θ = 37.23°

HELP ASAP 20 POINTS BRAINLIEST

Answers

So the arrow goes through (-2 and -2) so your answer would be -4

-2+-2=-4

Hope this helps

How do I find central angle with coordinates (42.36,-71.06) (44.5,-73.11) in order (a,b) (c,d)

Answers

¿ SiNo no nosenkkknkkkkkk

Write an equation for the following scenario.

An gorilla grows continuously at a rate of 347.2% for the first year of life. When they are born they are 4 lbs.

Answers

Answer:

3.472x = 4

Step-by-step explanation:

srry if im wrong, but I tried and this question is hard


HELP

Which of the following does Ax + By = C represent?
a) slope
b) standard form
c) slope intercept form
d) y intercept

Which of the following does b represent
A. Slope
B. Standard form
C. Slope intercept form
D. Y intercept

Answers

Ax + By = C is standard form
B represents Y-intercept

Naomi wants to take fitness classes at a nearby gym, but she needs to start by selecting a membership plan. With the first membership plan, Naomi can pay $54 per month, plus $1 for each group class she attends. With the second membership plan, she'd pay $12 per month plus $3 per class.
If Naomi attends a certain number of classes in a month, the two membership plans end up costing the same total amount. How many classes per month does that take? What is that total amount Naomi will pay per month for a membership and that many classes?

Answers

54+x=12+3x
X=21 =number of classes
Total amount she will pay is $75

whats the mode of $6.00 $6.00 $6.00 $6.00 $5.00 $7.00 $4.00 $7.00​

Answers

Answer:

4.00,5.00,6.00,6.00,6.00,6.00,7.00,7.00

Step-by-step explanation:

Mean  5.875

Median  6

Mode 6.00

At noon Ada and Kent had gallons of lemonade left at their lemonade stand. The next 3/8 customer bought of the remaining lemonade.How much lemonade did the customer 1/3 buy?

Answers

Answer:

2

Step-by-step explanation:

Which represents the solution set of the inequality 5x-9 < 21? a. x < 12/5 b. x > 12/5 c. x > 6 d. x < 6

Please answer both it will really help

Answers

7. None of the answers r correct (its 6, btw)
8. Addition and subtraction signs is the best answer choice, im not sure what the bottom one says

Hope this helps!

I commented on one of ur other problems haha, u just replied, good luck tho!!

A storekeeper increased the price of snack by `20\%`.



If the price of a snack (after the increase) is `\$3.25`, what is the original price?

Answers

The original price I believe is $2.60

Felipe planted some seeds for a science project. One of his plants grew 6 1/2 inches in the first week, and then it grew 5 3/4 inches during the second week. How much did the plant grow during these two weeks? The answer should be written as a proper mixed number and should be simplified, if possible. *ill give brainliest*

Answers

Answer:

12 1/4

Step-by-step explanation:

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