Mathematics High School

−7x − 2y = −13
x − 2y = 11
use the substitution method to find x and y

Answers

Answer 1

Answer:

x=3

y=−4

Step-by-step explanation:

Add 2y to both sides of the equation.

x=11+2y

−7x−2y=−13

Replace all occurrences of x with 11+2y in each equation.

−77−16y=−13

x=11+2y

and then you just connect the dots

Related Questions

Given that (-1,3) is on the graph of f(x), find the
corresponding point for the function
f(x - 1).

Answers

I tried helping but I cant figure it out let me see..

Answer: 0,3

Step-by-step explanation:

someone please help and explain asap will mark brainliest!!

Answers

Answer:

x-1=8

y+1= 28

Step-by-step explanation:

Hope this helps

Please mark brainliest

Help me someone !!!!

Answers

Answer: 1 and 2 centimeters become 10 and 20 millimeters, while 30 and 80 millimeters become 3 and 8 centimeters.

Step-by-step explanation:

If you have more questions like this you should try using a conversion chart/calculator!

Answer:

10 and 20 and The test arendifferent

Molly and her friends just dined at a restaurant and left a tip of $12.07, which was equal to exactly 19% of the total bill. What was the total bill in dollars? Round your answer to two decimal places. plz helppp

Answers

Answer:

not sure but i think its 2.29

Step-by-step explanation:


Mrs. Hart asked her class "How many groups of 2/3 are in 7?" Hanna answered "There are 5 and 1/2 groups of 2/3 in 7" Do you agree or disagree with
Hanna? Be sure to explain your answer

Answers

Answer:

ok thx for my points back

Step-by-step explanation:

HURRY
An angle measures 47°. What are the measures of the angle’s complement and supplement? A. complement, 43°; supplement, 133° B. complement, 133°; supplement, 43° C. complement, 53°; supplement, 143° D. complement, 143°; supplement, 53°

Answers

The angle that is complementary to 47° is 43°

The supplementary angle of 47 degrees is 133 degrees

Answer:

A.)  complement, 43°; supplement, 133°

Step-by-step explanation:

A compliment angle is any angle(s) that adds up to 90°

A supplement angle is any angle(s) that adds up to 180°

For compliment:

90 - 47 = 43

For supplement:

180 47 = 133

Therefore, the answer would be A.

-kiniwih426

The diagram shows a square.
(6x - 1) cm
Find the length of the side of the square.
Your final answer must say, side = ...
... cm
1
+
(4x + 6) cm
I

Answers

The length of the square in the given diagram is calculated as: 20 cm.

What is a Square?

A square is a shape that has 4 equal sides of the same length.

In the diagram given, the square has the following expressions representing two sides:

(6x - 1) cm

(4x + 6) cm

Since both sides are equal sides of a square, therefore:

6x - 1 = 4x + 6

6x - 4x = 1 + 6

2x = 7

x = 7/2

x = 3.5

Side of the square = 6x - 1

Plug in the value of x

Side of the square = 6(3.5) - 1 = 20 cm

Learn more about square on:

https://brainly.com/question/1538726

#SPJ1

Please help thanks I appreciate it! :)

Answers

Answer:

Step-by-step explanation:

120 x .6 =72

120-72 = 48

48x .6 = 28.8

72+28.8 = 100.8

She sold approximately 101 cups of coffee

Help me!?!
I’ll give you 5 stars?!

Answers

Answer:

i think its b 68 because if you add al the sides that what i got

Step-by-step explanation:

18 + 18 + 10 + 10 + 6 + 6=  = 68

Answer:

1080 or 68

Step-by-step explanation: 10*18*6=1080

10+10+18+18+6+6=68

The percent of sales tax is 8% if the skateboard cost $98 what is the total amount you will pay including tax?

Answers

Answer:

The total amount of tax is $7.84, so add that to $98 and you get $105.84 dollars total.

Step-by-step explanation:

The sides of the base of a right square pyramid and its slant height are tripled. What is the surface area of the larger pyramid divided by the surface area of the smaller pyramid? A. 3 B. 6 C. 9 D. 12

Answers

Answer:

Step-by-step explanation:

If the base length and slant height are multiplied by 3, the surface area is multiplied by 3² = 9

How do you evaluate fuctions?

Answers

Step-by-step explanation: To evaluate functions substitute the given number or expression function's variable.

2) Dan is playing a game that involves the spinners shown below.*
10 points
Spinner 1
Spinner 2
Spinner 3
6
2
Greon Red
Blue Yellow
5
3
F
Which durt shows all of die possible combinations of an even number on Spinner 1,
Red or Blue on Spinner 2, and a B on Spinner 3?
A
с
Spinner 1 Spinner 2 Spinner 3
2 Red B
4
Red
B
6 Red B
2 Blu B
Blue B
6 Blue B
Spinner 1 Spinner 2 Spinner 3
2
Rod B
2 Red B
Red
4 Blue
B
6 Blue B
6 Blue B
B
D
CC
Spinner 1 Spinner 2 Spinner 3
1
Red B
2. Blue B
3 Red B
Blue B
5 Rod
B
6
Blue B
Spinner 1 Spinner 2 Spinner 3
2 Red
4 Red
B
6 Red А
2 Blue B
Blue А
6
Blue B

Answers

Answer:

1 spanner 2 greoun red 3 blue 4 .... 6 blue

Which term matches the definition? one that can be answered with
data and for which it is anticipated that the data collected to answer the
question will vary.
A. symetrical graphs
B. skewed right
C. skewed left
D. statistical question

Answers

D) statistical question

Ms. White is going to the grocery store to buy peamut butter for $3.50 a jar. She's going to the store with
$35 but needs to save $15 for tomorrow.

Answers

Answer:

5. your question wasnt finished so there was not answer.

Step-by-step explanation:

Im guessing your question was how many jars can she by?

If so then

35 - 15 is 20

20 divided by 3.50 is 5.714

So she only has enough money left to buy 5 whole jars

solve the inequality for n.
14 < n - 3​

Answers

Answer:

n > 17

Step-by-step explanation:

Add 3 on both side: n - 3 + 3 > 14 + 3

--> n > 17.

If it is helpful, plz give me Brainliest.

Answer:

n>17

Step-by-step explanation:

14<n-3

move the terms

-n<-3-14

calculate

-n<-17

change the signs and you get n>17

which of the following is the correct factorization of the trinomial below -7x^2+5x+12

Answers

The factored form would be (-7x+12)(x+1)

It’s always good to know the several ways to solve these problems, but one of the easiest and fastest would be the box method.

The box method involves you finding you a, b, and c values in a quadratic equation. It goes as follows, Ax^2+bx+c. When doing the box method, you multiply only your A and c. In this case -7*12 which gives you -84. Next you just find you b value (which is 5).

Now comes the trick part, you need to find the factors of -84 that ADD UP to equal 5. Therefore we just find the factors of 84 by listing them (find them for 84 then determine with the negative later). So we have 2, 42/ 3,28/ 4/21/ 6,14 / and 7,12. It becomes easier to find your factor, but 7 and 12 can equal to 5 in this condition due to 84 being negative, therefore one of the factors will be negative. By making 7 negative we can make 12+-7 equal to our b value of 5.

Now that we have the factors, we put them into fractions. We put them in the form that a would be on top and the factor would be on the bottom. Therefore a/(factor). In this case is would be -7/12 and -7/-7. With these fractions, we then simplify as much as we can, -7/12 cannot be simplified so it stays the same, but -7/-7 can be simplified to 1/1.

These fractions then become you FACTORS of your quadratic equation, in which case the a value in the fraction adds x to it, therefore it would be -7x+12 and x+1. The correct would would be (-7x+12)(x+1).

Answer:

-1(7x-12)(x+1)

Step-by-step explanation:

Ape s* x

Find the domain for the rational function f(x) = x-5/2x-3

Answers

Answer:

you have not gave full question what is f (x) given in question.

PLEASE help with #17! WILL GIVE BRAINLIEST!!!

Answers

Answer:

C

Step-by-step explanation:

You want to know what f(a) is when a = 3That means that wherever you see an a on the right, you put in a 3.To put the question in a bit clearer language, what is the y value (f(a)) is the y value), when a = 3

f(a) = a^3 - 4a^2 + 2a - 6f(3) = 3^3 - 4(3)^2 + 2(3) - 6f(3) = 27 - 36 + 6 - 6f(3) = - 9

can someone please help factoring i don’t think i did it right

Answers

Answer:

Step-by-step explanation

we are taking the same quiz do you know mr.brewer


Triangle ABC is similar to triangle XYZ Solve for p

Answers

Answer:

p=30

Step-by-step explanation:

Answer:

30

Step-by-step explanation:

I got it right on khan

this is U5L1 on page 13
on open up resources(grade 8 math)
y=x-4
y=6x-10

Answers

Answer:

(x,y)=(6/5,-14/5)

Step-by-step explanation:

x-4=6x-10

x-6x=-10+4

-5x=-6

x=6/5

y=6/5-4

y=-14/5

(x,y)=(6/5,-14/5)

the picture says it all i need a answer quick!!!!!

Answers

Answer:

the answer is going to be 42 [tex]in^{2}[/tex]

Step-by-step explanation:

12 x 13 divided by 2 = 78

6 x 6 = 36

78 - 36 = 42

Find the slope.
Find the y-intercept
Write the equation (y=mx+b)

At Philip’s Phones you can get a new cell phone plan for $45 a month plus $30 activation fee.

Answers

y=45x+30

x=months
y= fee

9514 1404 393

Answer:

slope: 45y-intercept: 30equation: y = 45x + 30

Step-by-step explanation:

The slope is the cost per month. (A slope is often expressed as a ratio: dollars per month, in this case.) The slope is 45.

The y-intercept is the value that obtains when the number of months (in this case) is zero. It is the activation fee, 30. The y-intercept is 30.

__

The equation in slope-intercept form is ...

  y = mx + b . . . . . where m is the slope and b is the y-intercept

Using the above numbers, the equation is ...

  y = 45x + 30

A can of paint can cover 300 square feet of wall space. Your living room has a wall that is 20' x 10), another wall that is 14' x 10', and a third wall that is 9 x 10'.
If you guess that you probably have an extra 100 square feet of wall space over doors and around door frames, will two cans of paint be enough to paint your living room?

Answers

Answer:

Step-by-step explanation:

4/05/2017 · Here's another way to figure out how much paint you will need: Paint Calculator Tip 1: One gallon can of paint will cover up to 400 square feet, which is enough to cover a small room, like a bathroom. Paint Calculator Tip 2: Two gallon cans of paint cover up to 800 square feet, which is enough to cover an average size room. This is the most common amount needed, especially when considering ...

Your grandmother made 240oz of jelly. You have two types of jars. The first holds 10oz and the second holds 12oz. Write an equation that represents the different numbers of 10-oz jars,x, and 12-oz jars, y, that will hold all the jelly

Answers

Answer:

Twenty four ten ounce jars and twenty twelve ounce jars

Step-by-step explanation:

Which Set of Ordered Pairs Represent a linear function? DUE BY MIDNIGHT

Answers

I believe it is answer choice B!

3x3x3x3x2x2. Complete the expression using exponents

Answers

Answer:

3 to the power of 4 and 2 squared

Step-by-step explanation:

count the amount of numbers and put the little number in top right (exponent)

Answer:

3x3x3x3x2x2 = (3x3x3x3) x (2x2) = 3^4 x 2^2

Let me know if this helps!

What is the area of the triangle?
3
6

Answers

Answer: 6

Step-by-step explanation:

2*3*6=12

12/2=6

formula= b*h/2

Answer:

the area should be 6

Step-by-step explanation:

to find the area of the triangle you do base × height over 2. So, (6 × 2) ÷ 2. 12 ÷ 2 = 6.

i need help T^T ill mark brainliestT^T

Answers

Answer:

it's A (I'm sure)

Step-by-step explanation:

........

Answer:

option A is correct 2:10=14:10

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