Mathematics Middle School

solve the systems using substitution
1. y=10x
2x+y = 12
2. x=y+1
x+3y = 9

Answers

Answer 1
??? I don’t get this question
Answer 2
1. Plug in the y= problem to 2x problem. You should get 2x + 10x = 12, 2x + 10x is 12x so the new problem is 12x = 12 divide both sides by 12 and x = 1. Now, plug 1 in for x in y=10x which 10 x 1 = 10 so y is 10. X = 1, Y = 10

2. Same steps different numbers and you plug in x this time instead of y. So, y + 1 + 3y = 9, simplified is 4y + 1 = 9, subtract 1 form both sides. 4y = 8. Divide both sides by 4, y = 2. Plug y in, x = 2 + 1, x = 3. X = 3, Y =2

Related Questions

Consider the expression 2 6 3··52 1 27 4··152 1 2 1··5. a. Estimate the value of the expression. Show your work.

Answers

Answer:

Step-by-step explanation:

13.58

help pleaseeeeeeee!! John is baking rectangular cakes. The first cake he baked was 3 inches wide and 5 inches long. The second cake he baked was 6 inches wide and 10 inches long. The third cake he baked was 12 inches wide and 20 inches long. If John continued this pattern, what would the dimensions of his fourth cake be?

Answers

Answer:

Step-by-step explanation:

try 40 inches long and 24 inches wide

explanation is 5 x 2 = 10  10 x 2 = 20  20 x 2= 40.

and 3 x 2 = 6  6 x 2 = 12  12 x 2 = 24

The number are getting multiplied by 2 each time so the fourth cake would be 24 inches wide and 40 inches long.

To celebrate its grand opening, a store is giving customers gift certificates Which customer is the first to get two gift certificates?

Every eight customer gets a $50 gift certificate
Every 6th customer gets a $10 certificate

Answers

Answer:

24

Step-by-step explanation:

8=2*2*2

6=2*3

lcm= all factors they both share one times and one each of factors they don't share

2*2*2*3=24

24 because i said so..

help me pleaseeeeeeeeee

Answers

Answer:greater than

Step-by-step explanation:

50/1 is greater than 45/ 3/4

The
Answer is

Greater than

A pet store sells a 50-pound bag of kitty litter for $18.
What is the price per pound of kitty litter?

Answers

18 dollars/50 pounds
0.36

$0.36/pound
0.36$ is the correct answer

Cheyenne took 42 cards to her next craft fair. She sold 3 more cards than she did at her previous show. What percent of the cards did Cheyenne sell?

Answers

Answer:

7.1428%

HOPE THIS HELPS

what is the answer i need answers now like right now the assignment is past due date

Answers

It’s 1. The answer is one.

Answer:

I added the whole thing

Can someone help, please

Answers

Answer:

Slope= 2

Step-by-step explanation:

Point 1: (4,2)

Point 2: (5,4)

4-2=2

5-4=1

Answer: 2

Answer:

Slope is 2

Step-by-step explanation:

[tex](y2-y1)/(x2-x1)\\(4-0)/(5-3) = 4/2 = 2[/tex]

what is the answer i need answers now

Answers

Answer:

it is going to be over 13 quarts.

Step-by-step explanation:

Fabiola’s basketball team practices 4.25 hours each week basketball season is 14 weeks long .how much time does Fabiola’s spend in practice during the season? and show how to do the problem

Answers

Answer:

59.5 hours

Step-by-step explanation:

Since Fabiola has basketball practice for 4.25 hours each week and we need to find how much she practices for 14 weeks, you have to multiply.

4.25 x 14 = 59.5

In order to determine the total time, we simply need to multiply 4.25 hours by 14, since the length of time is dependent to the number of weeks.

= (14)(4.25)

=59.5

Final answer:
Fabiola's team spend 59.5 hours in 14 weeks.

1114 divided by 14 (PLEASE HELPPP)

Answers

Decimal form: 79.6
Fraction form: 398/5 or 79 3/5
1114 divided by 14 is 79.5

Just one more!! YAY!!!!!!!!!!!!!!

Answers

Answer:

Let x be no. of movies watched.

PART A: 10 + 1x

PART B: 15+0.5x

10+1x=15+.50x

10+1x-(15+.50x) =0

1x-(.50x+15) +10=0

x-(.50x+15) +10=0

x-.50x-15+10=0

0.5x-5=0

0.5x=5

x=5/0.5

x=10

Please Help me Understand this Function and Relation problem and solve it

Answers

I’m pretty good with functions, all the numbers in the domain can only have one range ☝ so if for example, 3 had a arrow going to 5 and 7. That wouldn’t be a function, because 1 function has 2 domains, and since you have no range its not a clarified answer meaning that there’s following domain to go with the range so I wouldnt really say it’s a function because the domains have not range to go to, hope this helped!! :D
Hehebsnsjsjsbsbsh shdjdjndndbdjd

Can someone help, please

Answers

Answer:

slope = [tex]\frac{3}{4}[/tex]

Step-by-step explanation:

the formula is straightforward which is [tex]\frac{y_{2} -y_{1} }{x_{2}-x_{1} }[/tex]

pick two coordinates that have a clear x and y point

then make one of the coordinates [tex]x_{1}[/tex] and [tex]y_{1\\}[/tex] and then make the other [tex]x_{2\\}[/tex] and  [tex]y_{2\\}[/tex]

once you've done that plug them into the equation and boom you have your answer

The Slope is 3/4 or .75 as a decimal

Which sets of ordered pairs show equivalent ratios? Use the grid to help you. Check all that apply.
(1, 2), (2, 3), (4, 7)
(2, 2), (4, 4), (6, 6)
(3, 1), (4, 1), (5, 1)
(4, 1), (8, 2), (12, 3)
(2, 1), (4, 3), (5, 4)

Answers

Answer:

The answer is B and C.  

Step-by-step explanation:

The pairs (2, 2), (4, 4), and (6, 6) have ratios of 1 and the pairs (4, 1), (4, 1),  (8, 2), and (12, 3) have ratios of 4. The other pairs do not have similar ratios.

Answer:

(2, 2), (4, 4), (6, 6)

(4, 1), (8, 2), (12, 3)

Step-by-step explanation:

These are the only two where the ratios are the same for each ordered pair

If you plot them you will get a straight line with non-zero slope

The others do not show this characteristic

First one has ratios
2/1, 3/2 and 7/4 not same

Third one has ratios

1/3, 1/4, 1/5

Last one has ratios

1/2, 3/4 and 4/5

Hope that helps

Ryan is a wrestler trying to make weight. He currently weighs 200 lbs. If he cuts 2 lbs. per week, how many weeks will it take him to weigh less than 175 lbs.?

10 points

Answers

Answer:

12.5 weeks

Step-by-step explanation:

Let's make a equation: 175=200-2x

rearrange it: -2x+200=175

subtract 200 from both sides

-25=-2x

divide both sides by -2

x=25/2

25/2=12.5

Answer:

12.5

Step-by-step explanation:

he wants to weigh 175lbs so he wants to lose 25 pounds,

25/2 = 12.5

Which of the following rounds most closely to 1?
A. 1/5

B. 4/5

C. 4/8

D. 2/3

Answers

Answer:4/5

Step-by-step explanation:

1/5 is closer to zero than 4/5 so we know it can't we that one.

4/8 is equal to 1/2, and 4/5 is closer to 1 than 1/2 is

2/3 multiplied by 5  is 10/15, while 4/5 multiplied by 3 is 12/15

by getting the same denominator we can see that 4/5 is the closest fraction to zero.

The answer is b 4/5 is closer to 1

The equation g equals three fifths' times m represents the proportional relationship of the number of gallons of water (g) used by a washing machine over a certain period of time, in minutes (m). Create a written description for the equation

best answer will get brainiest

Answers

Answer:

For each gallon of of water the washing machine uses, it runs for three-fifths of a minute

Step-by-step explanation:

Please help me QUICKLY

Answers

Answer:

0.49 is the only one that lies between 0.015 and 0.50 so just graph that one where you think it should go

Answer: 0.13 and 0.49


Explanation: Notice how there is a 0 before 15 in the number 0.015, this means it's a smaller number and that it's in the hundredths place. This means that 0.50 is in the tenths place. I hope this helps.

What is the answer i need answers now like right now

Answers

Step-by-step explanation:

I believe it’s number 1

The YMCA lap pool is a right rectangular prism 36.8m long by 20m wide. . The pool contains 1472 m(to the power of 3) of water.

How deep is the water in the pool?(in meters)

Answers

Step-by-step explanation:

The computation of the total amount of water needed could be determined by using the volume formula which is shown below:

where

L = length,

W = width,

and D = depth.

Now putting the values to the above formula

Therefore, the total amount of water needed is

We simply applied the above formula

solve each equation for the given variable

xy = k;y

a = 2/b + 3c; c

6(2c = 3d) = 5(4c-3d); d

Answers

Step-by-step explanation:

y=k/x

[tex]c = \frac{a - \frac{2}{b} }{3} = \frac{ \frac{ab - 2}{b} }{3} = \frac{3(ab - 2)}{b} = \frac{3ab - 6}{b} [/tex]

No se cual es la respuesta a eso la verdad

Lena sold 4,832 copies of her book. Elias sold 4,832 times one-fourth copies of his book. Which statement compares the number of books sold?

Elias sold four times the number of books Lena sold.
Elias sold one-fourth the number of books Lena sold.
Lena sold twice the number of books Elias sold.
Lena sold one-fourth the number of books Elias sold.

25 pts + I'll give Brainliest

Answers

Answer:

Elias sold one-fourth the number of books Lena sold .

Step-by-step explanation:

(Not sure)

Answer:

I'm pretty sure it's the 2nd option

In the example shown, how many miles will June walk in 2.8 hours? Estimate first, then compare your answer to the estimate. 1.7 miles in 1 hour if she walks at the same rate how far will she walks in 1.5 hours

Answers

Answer:

What are the examples I can't answer this without them

Step-by-step explanation:

help pleaseee no wrong answerrrrrrr

Answers

It’s is going to be 6 meters per second
The answer is 6 meter per second

Hopefully that helps!

what is the answer i need answers now pls

Answers

Answer:
Answer:512
Explanation:Siri told me
512 I used my calculator

please help. A B C D

Answers

Answer:

2

Step-by-step explanation:

1,3, and 4 are all eliminated because they are all false. 2 is the only reasonable answer.

Answer:

B  & A

Step-by-step explanation:

Elm and Cathedral are the same but flipped

The least of Cathedral is one while the greatest of Elm is 4

Drag and drop one set of parentheses into the expression below so that it's value when simplified is 31. Where would these ( ) go? _2_*4^2_+_square root36_-_13_

Answers

Answer:

2 * (4^2 + squared root of 36) - 13

since the space where the _ are, that's where the parenthyeses would be placed. If you place these around 2, you get 25, is around 4^2, it's also 25, if placed around square root of 36, it will also be 25, but if placed around -13, it's -46. But place then around 4^2 + the square root of 36, then you will get your answer of 31 simplified.

The answer is 2* (4^2 + squared root of 36) - 13

ples show yur work;3

Your design for the water treatment facility's management office includes a striking glass block wall covering, 7,000 square feet. The bricklaying company can lay 35 square feet of glass bricks per hour. If the company Work 10-hour days, what percentage of the job will be complete after 4 days?

Answers

tbh it is kinda sus sus sus sus sus sus

that looks really hard

what is the answer i need answers now like right now

Answers

Answer:

middle option: 2(f + 5)

Step-by-step explanation:

The distributive property states that:

A(B + C) = AB + AC

Therefore,

2f + 10

= 2f + 2(5)

= 2(f + 5)

Answer: 2(f+10)

Step-by-step explanation:

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