Mathematics Middle School

Althea has 100 trading cards and Marlon has 20. Every day Althea gives Marlon one card. Use the equations "c=100-d" and "c=20+d" to model this situation. Solve the system by substitution. Explain what the solution means in this situation.

Answers

Answer 1

Step-by-step explanation:

c=100-d {Equation 1}c=20+d {Equation 2}

{Equation 1 + Equation 2}

2c=120 (-d+d= 0)So d is eliminated c=120/2c=60Althea = 60=100-d(substitute c for 60 )d=100-60d=40Check your answer by substituting both c and d60=100-40(substituting using equation 1)So 60=60Answer is correct!

C is the Althea's and Marlon's letter

D is the amount of cards that Althea gives and Marlon receives..

Related Questions

The volume of a suitcase is 3060 cubic inches. The length of the suitcase is 17 inches and the width is 15 inches. What is the height?

Answers

Multiply the length by the width:

17 x 15 = 255

Divide the volume by that:

3060/255 = 12

The height is 12 inches.

The answer would be 12 inches!

A table titled Number of Dogs Adopted has entries 3, 3, 4, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9. The total is 132.
A shelter kept track of the number of dogs adopted each day for three weeks. Use the table to find the statistical measures.

Mean:

Median:

Mode:

Range:

Answers

Mean= average, so 132/21 entries, =6.286 (don’t know what they want you to round it to...try 6.3

Median= middle of the numbers when written in order, so 7

Mode = number that occurs most often in the set, which is 8

Range = largest number - smallest number, so 9-3=6
range:9-3

mode:8

median:7

mean:132

Four graphs are shown below:

Scatter plot A is shown with data points that move in an upward direction and are located at 1 and 0.3, 2 and 1, 3 and 2, 4.1 and 4, 5.2 and 6.1, 5.9 and 9.5. Additional points are located at 4.6 and 5, 5.8 and 7.4, 5.2 and 7.1. Scatter plot B shown with data points that move in an upward direction and are located at 0 and 2, 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 7, 6, and 8, 7 and 9. Scatter plot C shown with data points that move in a downward direction and are located at 0.1 and 8.7, 4 and 5.6, 5 and 4.3, and 6 and 0.5. Additional points are located at 5.9 and 1.5, 5.5 and 3.5. Scatter plot D is shown with points that move in a downward direction and are located at 0 and 7, 1 and 6, 2, and 5, 3 and 4, 4 and 3, 5 and 2, 6, and 1.

Which graph represents a positive linear association between x and y?

Graph A
Graph B
Graph C
Graph D

Answers

Answer:

Step-by-step explanation: im pretty sure its a

The required graph B shows the data points that move upward direction and are located at 0 and 2, 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 7, 6, and 8, 7 and 9. Option B is correct.



Graphs have been shown below, the graph with the positive linear association between x and y to be determined.


What is a graph?

The graph is a demonstration of curves that gives the relationship between x and y-axis.

Options C and D can be omitted first because question asked for positive linear association between x and y, but in both graphs have negative associations so both options are incorrect.
While Option A and B have a positive association but graph A does not have a linear association so graph A will also be omitted. Graph B has a linear association because a straight curve represents linearity.

Thus, the required graph B shows the data points that move upward direction and are located at 0 and 2, 1 and 3, 2 and 4, 3 and 5, 4 and 6, 5 and 7, 6, and 8, 7 and 9. Option B is correct.

Learn more about graphs here:

brainly.com/question/16608196

#SPJ2

|x|= -5 (find the absolute value-ish answer)
I will give brainliest plz help!!!

Answers

Answer:

5

Step-by-step explanation:

the absolute value of -5 is 5

Is x = 1 a solution to the inequality x ≥ 6

Yes or No

Answers

Answer:

No.

Step-by-step explanation:

If you insert 1 as x, you get [tex]1 \geq 6[/tex]. This is not true.

Hope it helps!

It is no. Because it common sense

will mark brainliest if right, can someone help me with this math question?

Answers

Answer:

$143.20

Step-by-step explanation:

Information needed:

Regular price: $179

Discount: 20%

Discount of 20% means he is only paying for 80%

Solve:

179(80%)

179(0.80)

= 143.20

2640 is 44% of what number

Answers

Answer:

Step-by-step explanation:

Your question is given in the picture  format please look in it ,

2640 is 44% of 6000. I hope this helps you.

Please help be correct and giving brainliest!!!

Answers

The correct answer is 59


When it says typical number it means the one with the most so yeah 59 is right have a good day

How many kilograms equals 984.2 grams?
Enter your answer in the box.

Answers

Answer:

984.2/1000=0.9842 kg equals 984.2 grams

HI pls help me this is DUE TODAY thank u!

Answers

The range to this question in set notation is (-infinity, positive infinity).
Hello positivity note:you can do everything if you work hard

What are all the factors of 10?

Answers

Answer:

1, 2, 5, and 10

Step-by-step explanation:

Answer:

1, 2 , 5, 10

Step-by-step explanation:

i Dont know

PLEASE HELP due today!

Answers

Answer:

First craft project part:

a.

If it was 10 inches, the red ribbon would be 3 inches long

10-7=3

If it was 27 inches, the red ribbon would be 20 inches long

27-7=20

If it was x inches, the red ribbon would be x-7 inches long

x-7=x-7

b.

12+7=19

The blue ribbon would be 19 inches.

Second books with Mai and Tyler:

If Tyler has 15 books, then Mai has 5 books.

15/3=5

If Tyler has 21 books, then Mai has 7 books.

21/3=7

If Tyler has x books, then Mai has x/3 books.

x/3=x/3

Bottle that holds 24 oz:

a.

It represents the space in the bottle that is unfilled.

Srry... it's just too much

The plates move at an average rate of about 5cm/y. How far have the plates traveled, assuming a constant rate, during this time?

Answers

Answer:

travel from 5 to 10 cm/yr.

Step-by-step explanation:

What is the slope?
Simplify your answer and write it as a proper fraction, improper fraction, or integer.

Answers

Answer:

slope of 1/4

Step-by-step explanation:

slope formula= y2-y1/x2-x1

coordinates i chose: (0,60) (40,70)

70-60/40-0=10/40=1/4

therefore slope of 1/4

hope this helps, also what grade is this problem

Answer:

It is a slope of 1/4

Step-by-step explanation:

hurry up pppplllllllllllllzzzzzzzzzzzz

Answers

Answer:

The mode is 2

The range is 11

7 runs where scores 1 time

The median is 4

19 games

Step-by-step explanation:

The mode is 2 because that has the most dots meaning it was the most common

The highest was 11 and the lowest was 0

11-0=11

above the 7 had 1 dot meaning they only scored 7 runs once

the median is 4 because that is the middle

there where 19 dots in total meaning there were 19 games

hope this helps

please mark me brainliest!

Answer:

asudjgiaef

Step-by-step explanation:

i need help plz I NEED TO SUBMIT

look at the picture and solve plz worth 10 points.

Answers

Answer:

1. 14.5

Step-by-step explanation:

1. 43.5/3

   _14.5____

3  | 43.5

     3

__________

      13

  -   12

__________

        15

   -    15

_________

          0

2. The 0's don't change the values, just the place tenses.

Answer:

14.5

Step-by-step explanation:

A grocery store sells bags of oranges in two different sizes.( IT NOT A )

-The 3-pound bags of oranges cost $4.
-The 8-pound bags of oranges cost $9.

Which oranges cost less per pound?

A 3-pound bags of oranges for $4.

B They are equal in price per pound.

C 8 pound bags of oranges for $9.

Answers

Answer:

Is C.

Step-by-step explanation:

4÷3=1.333333 and 9÷8=1.125

-12 times 9/-3 = ?
Plz Help me

Answers

The answer of that would be 36

Answer:

36

Step-by-step explanation:

Use a proportion and the conversion to convert between metric and customary units.

Mom made 1.5 L of chicken noodle soup. She has a container that will hold 50 ounces. Can Mom’s soup fit in the container? Show your work and explain your reasoning. (1 L = 33.8 oz)

If you do not show your work, you will NOT get credit. Showing work does not mean writing the answer. I need to see a proportion, as well as any multiplication/division you did.
pls help im failing

Answers

Answer:

(1 L = 33.8 oz)

Step-by-step explanation:

at first a price was decreased by 12%, then it was discounted again by an additional 5%. What is the percent of the total discount.
plz help :D

Answers

Wouldn’t that be 17%? Since it was first discounted by 12% then another 5%.
I hope this helped. Please give brainliest if it did. Thanks

Answer:

16.4% is the percent of the total discount.

if this helped, brainliest?

Three boxes are stacked one on top of the other. One box 4 is feet 11 inches tall, one is 6 feet 9 inches tall, and one 4 is feet 11 inches tall. How high is the stack?


Answer is in feet and inches, Use a number less than 12 for inches.

__ ft __ in

Answers

Answer:

16 ft 7 in, I correctly believe:)

Answer:

2 ft 7in 3ft 11in 6ft 9in

Step-by-step explanation:

Please help if you can. If possible please type how you got the answer so I can remember it next time I get a question like this.

Answers

Answer:

(2,3)

Step-by-step explanation:

I did this by using the equation that was given. y=x+1.

This mean that the starting point would be the coordinate (0,1) and the x is the slope, which means that from coordinate (0,1) I will go up one and one to the right until I intersected with coordinate (2,3).

That what I got 2,3 Y=x+1

Kim is selling candles to raise money for an animal shelter. She receives $4.50, and each box contains 10 candles. Choose ALL amounts that could be added to this table.

Answers

Answer:

B, D, E

Step-by-step explanation:

2 - 90

3 - 135

5 - 225

6 - 270

7 - 315

EXPERT HELP I'LL GIVE BRAINLIEST:

Answers

Answer:

C

Step-by-step explanation:

Answer is

C


Explanation is error

Tayna is trying to determine the measures of both angles in the map below. Her work is shown. Use this diagram to answer the remaining questions.


8) Tayna made a mistake in her work. Identify the mistake and explain how she could fix the mistake. *

9) How many degrees are there in the "Department Store" angle? *

10) How many degrees are there in the "Gas Station" angle?

Answers

Answer: what are the answer choices

Step-by-step explanation:

Answer:

There is no choices

Step-by-step explanation:

please show your work I’m trying to learn 35.60 x 2.07

Answers

Answer:

73.692

Step-by-step explanation:

   35.60

x  2.07

----------------

73.692

73.692
just use a calculator

Which table shows a proportional relationship between x and y?

Answers

Your answer is correct.
The bottom choice is correct. Every y is 1/2 of every x

Simplify the expression below.
8(4x+1)−18x−5

Answers

Answer:

14 times +3

Step-by-step explanation:

also srry could not find the sign for times (:

14x+3 is the correct answer

e669yrx4pk answer this question so i give you brain thingy

Answers

wait where’s the question?

Which ordered pairs are a solution. there is more than 1
-2x + 9y = 32
(-2,4)
(-7,2)
(-16,0)
(-2.5,3)

Answers

Pair one=40, pair two=32, pair three=32, pair four=32. So should be pair two, three, and four.

Answer:

Pair one: 40

pair two: 32

pair three: 32

pair four: 32

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