Mathematics Middle School

Solve this linear equation using substitution. (Please show work!)

X + Y = 7

7x + y = 1

Answers

Answer 1

Answer:

y=1-7x

Step-by-step explanation:

7x+y=1

The first thing to do is get the y by its self. So u cancel the 7x out by-7x and bring it to the other side.

7x-7x = 0

Now all we have left is: y=1-7x

Hope it helps and is right.

Answer 2
The answer is 7=1-7x

Related Questions

Help i give brainliest
Which statements accurately describe how to determine the y-intercept and the slope from the graph below?

On a coordinate plane, a line goes through points (0, negative 6) and (3, 0).
To find the y-intercept, begin at the origin and move horizontally to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction.
To find the y-intercept, begin at the origin and move horizontally to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation m = StartFraction x 2 minus x 1 Over y 2 minus y 1 EndFraction.
To find the y-intercept, begin at the origin and move vertically to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation m = StartFraction y 2 minus y 1 Over x 2 minus x 1 EndFraction.
To find the y-intercept, begin at the origin and move vertically to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation m = StartFraction x 2 minus x 1 Over y 2 minus y 1 EndFraction.

Answers

Answer:

summary

Step-by-step explanation:

Answer: Choice C

To find the y-intercept, begin at the origin and move vertically to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation m = (y2-y1)/(x2-x1)

============================================

Explanation:

The y intercept is where the graph crosses the vertical y axis. So that's why we move vertically from the origin to get to the graph.

The slope is calculated as the difference of y values over the difference in x values. We subtract in the same order for both. In other words,

slope = rise/run = (change in y)/(change in x)

Positive slope means the line goes uphill when you move from left to right. Negative slope means the line goes downhill when you move from left to right.

Multiply. Write your answer in scientific notation. Take a look at the picture!

Answers

the answer is 4 x 10^5

Answer:

The answer is 10 to the fifth power or in other words 100,000

Step-by-step explanation:

Roland wants to buy a jacket that is discounted 20% off the regular price. Which of the following is NOT a valid way to determine the amount of the discount?

A
Move the decimal point of the original price one place to the left and then double it.

B
Set up a proportion with the ratio of the original price to the amount of the discount equal to the ratio 20 to 100.

C
Multiply the original price times 0.2.

D
Divide the original price by 5.

Answers

C would be the answer because if you multiply 10 x 0.2 you will get 2 but if it is 20% off you would’ve gotten 5

help and look at the picture!

Answers

The answer is the second one 8×107

Answer:

8*10^7

Step-by-step explanation:

Multiply 2 and 4 to get 8

Add the exponents and u get 7

Therefore 8*10^7

An amusement park had 250 people attend during the course of 7 hours. At this rate, how many would they expect to attend over 15 hours?

Answers

Answer:

536 people

Step-by-step explanation:

What I did was I divided 250 by 7 which gives the average hour of people which is=36 people per hour

Then you multiply 35.7 by 15 which gives you=536 people at the amusement park in 15 hours.

Hope this helps.

how t f do I lable this I get so many of these and I've never been thought it

Answers

Answer:

Label the y-axis Charms and the x-axis Beads

Step-by-step explanation:

Answer:Under↓↓↓

Step-by-step explanation:

First of all your original answers are wrong.

They should be:

(2,8) Already Given

(4,16)

(6,24)

(8,32)

(10,40)

I have already putten them as coordinates, now you just have to put them in the graph.

Hope this helps and 1 Charm has 4 Beads btw, that's why you had big numbers at the end =D

Question 6 (ID=27678)
As labor costs, an electrician charges $36.50 per hour for himself, and $27.50 for his assistant. What would be the total labor cost for a job taking 6 1 over 2 hours?

A: $416.00 Strike Reset
B: $384.00 Strike Reset
C: $264.75 Strike Reset
D: $64.00 Strike Reset

PLEASEE

Answers

Answer:

36.50 + 27.50= 64     64 X 2= 128

Step-by-step explanation:

but i don't understand what you mean by taking 6 1

36.50+27.50=64, so multiply it by 2 and it will be $128 in total for two hrs

Who was part of the triumvirate after Caesar’s death? (3 people)

Answers

Answer: Octavian (the future emperor Augustus), Mark Antony, and Lepidus. i hope this helped

Step-by-step explanation:

Saba and Hena saved up Rs. 81.75 and Rs 45.25 respectively to buy a gift for
Mother’s Day. How much money in all have the sisters set aside for the gift?

Answers

Answer: $127.00

Step-by-step explanation:

Step 1: Line 81.75 + 45.25 up with 81.75 on top and 45.25 underneath.

Step 2: add the two 5’s (making 10) put the 0 underneath that and carry the one over to the left. ( 7+2+1 =10) then put your decimal point after the zero. repeat process (5+1+1=7) than add up 8+4 =12

Please review the picture, asap! Thank you! Will mark Brainliest.

Answers

2,3,5 work the best it seems to me

Answer:

Options 2 and 3

Step-by-step explanation:

  Andre babysat 5 total times, that represents the spaces with the w's in them. the w's represent the amount he earned for each time he babysat. The extra "4" represents the extra amount he earned. The "99" is the total amount of money he earned.

  A family of 5 drove to a concert and all of their tickets cost the same, this represents the spaces with the w's in them. The w's represent the cost of each of their tickets. The "4" represents the money they paid for the parking ticket. The "99" represents the total amount of money they spent.

  If you plug in each of these to the chart it makes sense, but if you try to plug the other examples into the chart then it will not work.

write the equation that represents the line graphed below​

Answers

Answer:

(2,-6)

Step-by-step explanation:

If it's not that then(-6,2)

But if it's not either i'm sorry

Which r - value suggests a strong
positive correlation?
A r = 0.1847
B r = −0.1847
C r = 0.9974
D r = −0.9974

Answers

It’s c I took the test

Arrange the four numbers to form a proportion that is true. 40, 50, 80, 64.

Answers

i think the answer is 40:64 = 50:80
40:64 and 50:80

How?

Let’s do decimals first. 40 divided by 64 is 0.625
50 divided by 80 is also 0.625

And fractions?

Simplify:

40:64 = 50:80
Is also
5/8 = 5/8

Hope this helped :)

Which of the following situations will include the origin when graphed?

A. Hayley runs at a pace of 1 mile every 8 minutes.
B. Gas costs $3.50 per gallon.
C. It is 68° at 7 a.m., and the temperature increases by 5° every hour.
D. Phone service costs $5.00, and an additional 5 cents for each minute.

You can choose more than one answer.....

Answers

I'd say A, D, and B.

However, I would choose answers at a CONSTANT because, what if you need to divide or multiply or something, let's say Derek runs 5 miles per 1 hour, you'd have to divide. Yet, I recommend these three answers.

Answer: A. Hayley runs at a pace of 1 mile every 8 minutes.

B. Gas costs $3.50 per gallon.

Step-by-step explanation:

A line N passes through the points (–1, 4) and (–1, –4).


Which is true of line N?

1. Line N is a vertical line with an undefined slope.

2. Line N is a vertical line with a slope of zero.

3. Line N is a horizontal line with an undefined slope.

4. Line N is a horizontal line with a slope of zero.

(Please help, I'm timed)

Answers

Answer:

1 and 2

Step-by-step explanation:

When you look at both of those points on a graph the line is linear and vertical; undefined

The answer is 1 I’m pretty sure

Here is the real problem ! Giving 30 points!

Answers

Answer:

A. the one in the table because after two hours it is the size of the one that began at 20 cm

B. the one describes by the graph because after 10 hours it would be 0 cm and the one described by the equation would be 5 cm

C. the one described by the graph will burn out in 10 hours as shown in the graph and the one described by the equation will burn out in 12 hours

Step-by-step explanation:

i hope this helps

ummmmmmm they aree right ^^^^^

Select from the drop-down menus to correctly identify whether the given operation is closed or not closed with respect to each set of numbers.



Real numbers are
closed, not closed
under multiplication.

Irrational numbers are
closed, not closed
under division.

Integers are
closed, not closed
under subtraction.

Positive rational numbers are
closed, not closed
under addition.

Answers

Answer:

Real numbers are "closed" under multiplication

Irrational numbers are "not closed" under division

Integers are "closed" under subtraction

Positive ration numbers are "closed"

Hope this helps! :)

Correct answer: closed, not closed, not closed, closed :D

ANSWER QUICKLY I'LL GIVE BRANLIEST
A gold mine has two​ elevators, one for equipment and another for the miners. The equipment elevator descends 4 feet per second. The elevator for the miners descends 15 feet per second. One​ day, the equipment elevator begins to descend. After 28 seconds, the elevator for the miners begins to descend. What is the position of each elevator relative to the surface after another 14 seconds? At that​ time, which elevator is​ deeper?

Answers

Answer:

9

Step-by-step explanation:

I think the correct answer is 9

What is the measure of angle Z?

Answers

Answer:

hmm

Step-by-step explanation:

I am very sorry, I do not know the answer despite the fact you are probably thinking “then why even answer” but it’s because I have to answer two problems to ask another question sorry goodbye

Drag the tiles to the boxes to form correct pears. Multiply the pairs of numbers and match them to their products.

Answers

i can’t see anything to match

represent these number as numbers in expanded form 1.45 x 10 to the 6th power.
2.807 x 10- 3rd power

Answers

Answer:

 23,958 =

 20,000  

+ 3,000  

+ 900  

+ 50  

+ 8  

Step-by-step explanation:

Answer:

1450000 and 0.002807

Step-by-step explanation:

I need help!!!

Will give brainly

If your gonna spam dumb stuff then leavee

Answers

Answer:

56.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.210526315856.2105263158 I would have helped

Step-by-step explanation:

order from least to greatest 29%,1/4, 0.33

Answers

Answer:

0.33,29%,1/4

Step-by-step explanation:

Answer:

0.33,1/4,29%

Step-by-step explanation:

π¢÷¢°¢=€==¢

A grocery store sells snacks by weight. A 6-oz bag of gummy worms costs $3.60. How much would it cost for a 2-oz bag?

Answers

Answer:

$1.20

Step-by-step explanation:

////////////////////////////

Answers

Answer:

Maple Street

Step-by-step explanation:

Are those the only options?

What property is 5x1/5=1

Answers

Answer:

Multiplicative Identity Property

Step-by-step explanation:

Answer:

Identity Property

Step-by-step explanation:

i think i helped you earlier too

pls help 23 points up for takeings

Answers

Answer:

40

Step-by-step explanation:

Calculate and write in simplest; 2 1/9+ 7 4/9=

Answers

Answer:

9[tex]\frac{5}{9}[/tex]

Step-by-step explanation:

Answer:

9 5/9

Step-by-step explanation:

Add the whole numbers- 2+7= 9

Add the numerators- 1+4= 5

Cannot be reduced.

Hope this helped!

What is the equation of the line in the graph?

Answers

Answer:

ummmmmmmmmmmmmmmmmmmmmmmmmmm

Step-by-step explanation:




y=2x+1
i think. hope that helps

Sandy can jog 3 2/5miles in 5/6 hours. Find her average speed in miles per hour.

Answers

the average speed sandy jogs is 4.08 miler per hour

Answer:

4.08

Step-by-step explanation:

3 2/5 ÷ 5/6

(3 x 5) + 2 = 17/5

Flip 5/6 to 6/5

Turn division sign to multiplication.

17/5 x 6/5 = 102/25

102 ÷ 25 = 4.08

Hope this helped.

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