Mathematics Middle School

Use elimination to solve the system 4x + 7y = -14 and 8x + 5y = 8 for x. Please show work! Will give brainliest!!!

Use Elimination To Solve The System 4x + 7y = -14 And 8x + 5y = 8 For X. Please Show Work! Will Give

Answers

Answer 1

Answer:

x=3 and 1/2

Step-by-step explanation:

4x+7y=-14

8x+5y=8

2(4x+7y=-14)

8x+14y=-28

8x+5y=8

9y=-36

y=-4

8x+5(-4)=8

8x-20=8

8x=28

x=3 and 1/2

Answer 2

Answer: A. x=3 and 1/2

Step-by-step explanation: (Happy to help) (0.<)

Related Questions

The equation for the area of a circle is given.

A=πr2

If the radius (r) of the circle is 3, what is the area in terms of π?

Answers

9 and then put a pi symbol. You do 3squared since it’s the radius and that’s 9. Then since it’s wanted in terms of pi that’s it. 9pi

is this expression fully simplified? Explain
4x2 + 10 - x - 6x3

Answers

Answer:

-x

Step-by-step explanation:

no it’s not. fully simplified would be -x

Kelly has some money saved. After mowing two lawns on Saturday, she adds $40 to her savings. Write an expression to represent how much money has Kelly saved.

(will give brainlist.. if you put soething random then im reporting you and will email brianly and give them your user)

Answers

Answer:

x+40 or 40+x

Step-by-step explanation:

It doesn't tell you the amount of money she's saved before so you make it a variable. I used x.

After mowing she got $40 and decided to add that to her savings.

You already know her savings before, x, and now you have $40.

So you end up writing the expression x+40 or 40+x.

Let’s say that the amount of money saved is the variable ‘x’.

There is a key word in the second sentence to be aware of. It’s simply the word, ‘add’, and when that word is there, we just simply do addition.

Remember that x is always first in an expression, though if it looks weird, you can just switch it; it’s alright.


Key word: Add = addition

Expression: 40 + x

What is the value of y?

Answers

Answer:y= 47/20

Step-by-step explanation:

Answer:

47/20

Step-by-step explanation:

3/4=y-8/5

3/4+8/5=y

47/20=y

please answer these 5 questions ill give brainliest and give more points after you answer

Answers

Answer:

go to the skating rink

Step-by-step explanation:

if multiply 5x 7 you get 35

If you add 35+15 you get 50 which is the amount of money you have. So if you chose the bowling ally you could bring 7 friends

but is you multiply 3x10 that equals 30

Add that by 20 and you get 50

let me know if its right

The question is in the photo :)

Answers

I think the first one is D, not sure about the other though! Sorry and also sorry if it’s not right, I’m not too great at maths :/
Number 1 is 12% and number 2 is also 12% please trust me and mark me brainliest

Which of the following does NOT show a rate of 12 text messages per hour?
a. Raquel receives an average of 6 text messages every 1/2 hour.
b. image attached
c. y = 12x where x is the number of hours and y is the number of text messages
d. image attached

Answers

Answer:

(0,0) doesn’t show a rate of 12 messages per hour

I’m confused about the rest please elaborate

Step-by-step explanation:

Consider the two functions below. Which one of these functions is linear? What is it’s equation? Enter any answers to two decimal places.

Answers

Y=(5/3)x+0
Rise over run graph function A and use ruse over run technique

can you guys help me pleasee this was due long time ago

Answers

Answer:

is this linear fractions to be exact mathaway will her;p

Step-by-step explanation:

I will give brainliest to whoever helps me with this question. Also, if you could please explain to me how you solved it I would appreciate it! (this is Pythagorean Theorem if your wondering).

Answers

Answer:

35 squared plus x squared equals 78 Squared

which makes your answer

69.7

Step-by-step explanation:

Answer:

35 square + x square 78 square

= 69.7

Step-by-step explanation:

Please help!! I will give brainilest. look at the picture!

Answers

Answer:

Rows 126

last row has 41

last row is not full because its an odd number

Step-by-step explanation:

PLS HELP ME!! I'm having a brain freeze at the moment-

Answers

Answer:

I'm sorry but I was doing it in my notebook and no and it came out a proper answer and well I'm not going to answer something that this bad I don't like to look bad the truth I thought was going to be easier but I couldn't do it I hope that another volunteer arrives and helps you and give you a better answer I will tell you what was my answer I think is not going to be bad 45.90

Step-by-step explanation:

please help me with this for brainliest please dont play around XD

Answers

Answer:

23/6

Step-by-step explanation:

3/56

23/6 hope it helps!! Lol

SHOW WORK

OK PLS HELP ME AND MY FRIEND REALLY NEED IT THE FIRST PERSON THAT ANSEWRS WILL GET BRAINLEST AND I WILL LITTERLY LOVE YOU AND WORSHIP YOU NO JOKE

Answers

Answer:

b=-3

Step-by-step explanation:

9+3=-4b

12=-4b

b=12/-4

b=-3

9=-3-4b
+3 to both sides
12=-4b
b=-3

Diana earns $9.00 an hour working as a lifeguard. Write an equation to find Linda's money earned m for any number of hours h. Make a table to find the diana's earnings if she worked 4,5,6, or 7 hours.

Answers

Answer:The equation that best represents the amount of money earned by linda is as follows:

m = 8.50 * h.

The table will be given by the substitution of the number of hours in the written equation:

h 4 5 6 7

m 34 42.5 51 59.5

Mrs. Woods prepared bags of baked cookies. The graph shows the number of bags and the number of cookies she used.
She distributed the cookies evenly throughout all the bags. How many cookies did she use per bag?

Answers

Answer:

around 20 cookies

Step-by-step explanation:

Answer:

D 15

Step-by-step explanation:

If you look at the graph the number of bags, in 1 bag is 15 and if she divided them evenly then 15 would have to be in every bag.

Kyrie bought shoes that were $105. He used a coupon that took 30% off. The sales tax is 4.5%. What is the final cost of the shoes?

Answers

Hi there!

I hope this helps you!

The spinner below is spun twice. What is the probability that the it will land on a white section and then a striped section?

Answers

5/8 or 65%


...............
It is a 4 in 8 chance that the spinner will land on the white section and a 1 in 8 chance that the spinner will land on the striped section. Since there are more white sections than any other it is more likely for the spinner to land on the plain white.

The graph below shows the amount of money Janet earned at her new job.

Answers

Answer:

Janets earns $7.50 an hour.

Step-by-step explanation:

2 hours : 15 dollars

divide by 2

1 hour : 7.50 dollars

Hope dis helped!

Answer:

$7.50

Step-by-step explanation:

2hours=$15

so 15/2=7.5

7.5 = %7.50

Help me! Brainliest!

Answers

use the app socratic

Answer:

Rip i saw you said times up :/

Step-by-step explanation:

Mrs. Kelley is driving 540 miles to visit Niagra Falls. She drives at an average rate of 60 miles per hour. Using the formula d (distance) divided by r (rate) in order to find the time it will take for Mrs. Kelley to get to Niagra Falls. Pls help :c

Answers

It will take Kelley 9 hours because 540 miles (distance) divided by 60 mph (rate) will give you 9 hrs

Answer:

9 hours with no stops

Step-by-step explanation:

540 mile drive  

60 MPH

distance divided by rate is 540 divided by 60 = 9

What is the GCF between w^6d^4y and w^5d^4 ?

PLEASE HELP I NEED THIS IS DONE ASAP

Answers

Answer:

d⁴y/dx⁴ = -12/x⁴

Step-by-step explanation:

y = 2In x

We want to find d⁴y/dx⁴. This is the fourth derivative.

Using product rule, first derivative is;

dy/dx = 2/x

how do i find the area for this

Answers

Answer:

1,728 yd²

Step-by-step explanation:

Area = b × h

36 yd will be the replacement for b

48 yd will be the replacement for h

Now we multiply 36 by 48

36 × 48 = 1,728 yd²

Answer:

1728

Step-by-step explanation:

Please help! Thank youuuuu~

Answers

Look up "Everything You Need To Know About Math In One Big Fat Notebook pdf." It's the best thing I've ever been given, I have it with me in math class all the time and I've aced every test. I have it with me right now and it has everything I've ever been taught about math in it so it might help you.

I need this quickly they both need expressions I think so

(will mark brainlist if right)

Answers

Answer:

1 - 155 +27n

2- 2x+15=33

Step-by-step explanation:

hope this helps

Find the area of the polygon, the vertices are (1,4) (2,1) (4,1) (5,4)

Answers

Answer:

Hello

Step-by-step explanation:

HELPPPPPPP
auntie have 70 dollar
the amount she has is just right for 4kg of fish and 3kg of prawn
auntie bought 3kg of fish and 4kg of prawns
her change was 3.50
how much is 1kg of prawn

Answers

Answer:

If auntie cant correct her grammer, how can she talk to the manager about what the fish need to survive??

Step-by-step explanation:

What is the probability that the computer produces the first letter of your name?

Answers

1/26

Because there are 26 letter in the Alphabet

Answer: 1/26

Step-by-step explanation:

A survey on planet rew found that 80% preferred tott juice to all other juices. if 32 beings preferred tott juice, how many beings were surveyed altogether?

Answers

I think it is 38 people total. For everyone
I think...

A triangle is formed by intersecting lines.

What is the measure of angle x?

Answers

The sum of all angles of a triangle = 180.
So 180-90 (right angle) - 51 (other known angle) = 39
the measure of angle x would be 39°
triangles only go up to 180° and that triangle already has a 90° right angle and a 51° acute angle. so the answer is 39°
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