Mathematics Middle School

Solve the system of equations by substitution. Write your solution as an ordered pair
x+y=81
y=8x

Answers

Answer 1
x + 8x = 81
9x = 81, x = 9
y = 8(9), y = 72
Solution: (9, 72)
Answer 2

Answer:

Step-by-step explanation:

Frt

Related Questions

help please!^^
You and a friend go to a UH Football game. At half time you are both famished so you head to the concession stand. You decide to buy pretzels that cost 9.50 each. If you give the cashier a $20 bill, what is the most amount of pretzels you can buy?

Answers

Answer:

2

Step-by-step explanation:

The total would be $19.00

Answer:

2

Step-by-step explanation:

The total would be $19.00

help please.........................

Answers

Answer:

1/6

Step-by-step explanation:

There are 15 non- paper clip things, and 5 paper clips. The ratio of not paper clips and paper clips is 3:1. There is a 1/3 chance a paper clip will be picked the first time. You have to change the denominator to 6, because he will pick twice. There is a 1/6 chance he will pick a paper clip both tries

Susan bought 15 pencils for $1.75. How much is each pencil?

Answers

Answer:i got 8 cents 9 cents if you round up

Step-by-step explanation:

15÷1.75=8.57

Answer:

$0.12

Step-by-step explanation:

1.75/15=.12

i need help with these (click the photo to see it clear)

Answers

1. 4(5+2)=4×7=28

2. 8(3+2)=8×5=40

3. 3(3+5)=3×8=24

4. 7(3+5)=7×8=56

5. 9(5+6)=9×11=99

6. 15(2+3)=15×5=75

7. 12(4+5)=12×9=108

8. 18(1+2)=18×3=54

9. 25(3+2)=25×5=125

10. 2(7+4+11)=2×22=44

I hope you will enjoy

help me , thank you very much for helping

Answers

Answer:

A and D are functions

Step-by-step explanation:

A is a function because each output is going down the same amount each time, in this case, going down by 4. (the function here is y = -x + 11)

B is not a function because there isn't a constant for y.

C isn't a function either because two x's are 0 with different y values, and you can't have that in a function.

D is also a function because of the equation on the right side.

The red line of the attachment below in A's function graphed, and the lime curve represents D's function graphed.

You’re welcome aiuxhdbenkaaourbrnkqiausbde

Can you help me with this. Is this a function, why or why not?

Answers

Yes it is a function

PLEASE ANSWER QUICKLY I WILL GIVE BRAINLIEST Mrs. Morales wrote a test with 18 questions covering spelling and vocabulary, Spelling questions W) are
worth 5 points and vocabulary questions (y) are worth 10 points. The maximum number of points possible
on the test is 100
Part 1 out of 4
Write an equation in slope-intercept form to represent the number of questions on the test
The equation is y

Answers

Here's our data:

15 questions total

Total number of points: 100

Spelling questions are worth 5 and represented by x

Vocab questions are worth 10 and represented by y

Therefore:

x+y=15

5x + 10y= 100

So:

x+y=15

x= 15-y

5x +10y =100

5(15 -y) +10y =100

75 -5y +10y =100

75 +5y = 100

5y=25

y=5

x +y=15

x+5=15

x=10

There are 10 spelling questions and 5 vocab questions

Please only respond if you know the answer I have this and more due at 12:59 (ignore the third tab lol)

Answers

Answer:

29. 55x2=110 miles per 2 hours

30. 3/2=1.5 bags a day

31. 10x12=$120 paied a year.

32. 20000/2=10000 EXP per half a day

33. 1800/2=$900 every 2 hours

34. 15x2=$30 every 2 hours

Answer:

29. 55x2=110 miles per 2 hours

30. 3/2=1.5 bags a day

31. 10x12=$120 paied a year.

32. 20000/2=10000 EXP per half a day

33. 1800/2=$900 every 2 hours

34. 15x2=$30 every 2 hours

Step-by-step explanation:

Ed deposited $6000 into a savings account 4 years ago. The simple interest rate is 3%. How much does Ed have in his account now?

Answers

Answer:

$200,000

Step-by-step explanation:

6,000×100=600,000

600,000÷3=200,000

So $200,000

it would be 6000-180=5820

Find the equation of the line that passes through the given points on the graph below.

Answers

y = -4/3x - 1

because rise over run is slope or you can do (y2-y1)/(x2-x1) and the y intercept is -1

Answer:

y = -4/3x - 1

Step-by-step explanation:

What is the distance between point A and point B, to the nearest tenth?

Answers

Answer: hey

Step-by-step explanation:

When a unit rate is simplified, it must have what number in the denominator?

Answers

Answer:

1 is the number in the denominator.

Step-by-step explanation:

A unit rate is a rate with 1 in the denominator.

Answer:

1 is the number in the denominator.

Step-by-step explanation:

The distance on the number line, is its _______________ _______________. It is always _________________________.

Answers

Answer:

answer

Step-by-step explanation:

Chris types at an average speed of 45 words per minute. He has already typed 1,500 words of his final paper. The paper has to be more than 3,750 words. Which of the following inequalities could be used to solve for x, the number of minutes it will take Chris to finish his paper? ANSWER CHOICES R IN COMMENTS

Answers

Answer:

C. 45x + 1,500 > 3,750

Step-by-step explanation:

You know he has already started on his paper with 1,500 words and he needs to have more words than 3,750 in his final paper which includes the 1,500. Thus, he would have 45x number of words remaining in his paper, according to his speed of 45 words per minute.

Remaining words + 1,500 words must be more than 3,750.

45x + 1,500 > 3,750

The > sign means that something on the left is more than something on the right.

Answer:

C. 45x + 1,500 > 3,750

could you mark me brainliest? xoxo

Step-by-step explanation:

One brother says of his younger brother: “Two years ago, I was three times as old as my brother was. In three years’ time, I will be twice as old as my brother.” How old are they each now?

Good Luck!!

Answers

Answer:

17

Step-by-step explanation:

Let us suppose two years ago my brother's age was x years

Then, my age was 3x

Three years from now, my brother's age will be (x +2+3) = (x+5) years

And my age will be (3x+2+3) = (3x+5) years

But it is given that i will be twice as old as my brother.

So, 2(x+5)= (3x+5)

or, x= 5 years

So my brother's present age is 5+2= 7 years

And my age is 5*3+2= 17 years

Pretty sure that the answer is 17

please help! show your work if you can.

Answers

Answer:

35 hot dogs and 52 sodas

Step-by-step explanation:

35 hot dogs and 52 sodas

if you have a qurter to all the time i listen to the same song how much money would i have

Answers

Answer:

How many times do you listen to the song

Step-by-step explanation:

Can someone help me with this

Answers

Answer:

60(10 -7) - (-26/2)^2 (do the problems in the parenthesis)

60(3) - (-13)^2  ( multiply 60 and 3 and then square -13)

180- 169 (subtract)

11

I'm pretty sure its 11 hope this helps

Just made a question based on health I'm posting this in the math category so more people can see it since more people do math and barely anyone does health! Much appreciated ty pls check out the question I posted pls

Answers

ok I will go check :)))))
i will go check :)))))))))

Which expression can be used to find the product of 63 x 42?

Question 10 options:

(60 x 40) + (60 x 2) + (3 x 40) + (3 x 2)


(60 x 3) + (60 x 2) + (3 x 40) + (3 x 2)


(40 x 60) + (60 x 3) + (2 x 40) + (3 x 2)


(40 x 2) + (60 x 3) + (2 x 40) + (3 x 2)

Answers

Answer:

yhe product of 63×42 is 21

The answer would be
A:

(60 x 40) + (60 x 2) + (3 x 40) + (3 x 2)

.

Help bruh helpppp . Jejdjdkdkdkckvk

Answers

Answer:

20 days

Step-by-step explanation:

pls mark as brainiest

75 of 20 days is 15 days

how much is 1=2+3x1 chum

Answers

Answer:

x=-1/3

Step-by-step explanation:

the answer is x=-1/3

Please help!!!
Please don't do it for the points either I will give the brainiest away.

Which expression has the least value?
−14/2
negative 14 over 2
14/−2
14 over negative 2
−9 − 1
negative 9 minus 1
−9 − (−1)

Answers

Answer:c

Step-by-step explanation:

What does Point P on the number line represent? (Use the hyphen for negative numbers, such as −9)

Number line from negative 8 to positive 10 in increments of 1 is shown. Only the even numbers are labeled. A point labeled P is placed at the third tick mark to the left of 0.

Answers

Answer:

-7

Step-by-step explanation:

SRRY IF I'M WRONG IM ONLY IN 7TH GRADE BUT MY PROFILE SAYS HIGH SCHOOL srry:(

Answer:

-7 im pretty sure if wrong so so sorry

Step-by-step explanation:

pls pls pls help brainliest
asap

Answers

Answer:

what the heck is this

Step-by-step explanation:

Ha ye I have no clue

I need help sooo um help plssss

Answers

Answer:

93

Step-by-step explanation:

3%=.3

.3*3100=93

The answer is 93 hope this helps!

._.Choose all the expressions that are equal to 0.7 × 0.41

Answers

Answer:

B and C

hope this helps

Answer: I think It would be b and c

If u anserw these two ill give u 80 points!

Answers

Answer:

H

Step-by-step explanation:

cans of dog food        c, cans of dog food

over                        =        over

number of days             number of days in a week

Help fast Please!!!!! What is the vertical distance between
(-3, -2.5) and (-3, 5)?

Answers

What I can tell is that they both share the same x coordinate. To help you understand, the horizontal line is from left to right, think of "The sun setting in the horizon.", it is often in the distance as a "left to right" line. So, I hope that helps, this leaves the vertical line as up or down.

With that out of the way, the x-axis lies on the horizontal line, whereas the y-axis lies on the vertical line.

Point coordinates are typically listed as (x, y), so... with that said, to find the distance we'll have to count downwards. As we know, negative x is to the left, negative y is further down, so... -3 to -12 is 9 points away.

Simple method: -3 - 9 = -12, or... -12 - -3 = -12 + 3 = -9.
In other words you get the basic idea, you can also just count, but whatever.

I hope that helps, have a great rest of your day! ^ ^

Find the least common multiple using GCF of 7 and 35

Answers

Its 7 do I still need to evaluate this?

Answer:

a least common multiple of 7 and 35 is 7

hope its right

Step-by-step explanation:

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