Mathematics Middle School

The sum of two numbers is 40. The second number is 5 less than twice the first number. Let x represent the first number
and let y represent the second number. What is the value of the first number? Use the table to guess and check.
Numbers
Х
у
x+y=40
y=2x-5
15
20
25
30

Answers

Answer 1

Answer:

Step-by-step explanation:

Double 15 x 2 = 30 -5 =25 +original 15 would be 40 answer is 15

Answer 2
The answer would be 25 because your trying to find less of the number

Related Questions

Help please. Due Friday

Answers

Right triangle

1) 75.6cm
2)10.14ft
3)16ft

Entire triangle

1)162cm
2)30.94ft
3)20ft

The radius of the base of a right circular cone is 4 cm, and its slant height is 6 cm. What is the surface area of the cone in terms of π?

a. 10π²
b. 28π²
c. 40π²
d. 52π²

Answers

Answer:

c

Step-by-step explanation:

πr² + πrl

Can someone please answer correctly plzzzz!!!!

Answers

Answer:

A negative number means cups are being used and a positive number means cups are being delivered to the shop.

2329 paper cups are left by the end of the week

On Thursday anywhere from 100-400 cups were used, I found this by looking at the number of cups used the day before and the day after.

Step-by-step explanation:

helppppppppppppppppppppp

Answers

Answer:

B 20%

Step-by-step explanation:

the answer is b 20%

Which one?? help please for a grade!! due today

Answers

Answer:

its 10

Step-by-step explanation:

because all you have to do is add a zero for each place you go

Answer:

First one 10

Step-by-step explanation:

Evaluate 2n - 3 for n = 5.

Answers

Answer:

7

Step-by-step explanation:

2n - 3

n = 5

Substitute in the given value and solve

2(5) - 3

10 - 3

7

2 times 5 which equals 10. 10-3 = 7. 7 is the answer

What percent of 500 is 120?
A. 12%
B. 20%
C. 24%
D. 30%

Answers

Answer: 24%

explanation: say 500 is P. 500 or P is our total and we need to know what 120 of 500 is as a percent. so we do this: P × 500/500 = 120/500 and 120 divided by 500 is 0.24 and that transfers into 24%

Help please (highest degree)

Answers

Answer:

1

Step-by-step explanation:

because power of x is 1. Hope you will understand if not then comment. I will explain

ANSWER: 1
POWER OF X= 1

Doing this for a lot of points. No faking!

Use the Distributive Property to simplify the expressions.


A: 13(n+4+7m) =

B: 25(x−y) =

C: 6(10+z+3) =

D: 7(8+x+2) =

E: 18(5−3w) =

Answers

a: 13n + 52 + 91m
b: 25x - 25y
c: 60 + 6z + 18
d: 56 + 7x + 14
e: 90 - 54w

Answer:

A=24 B=25 C=19 D=17 E=26

The base of the rectangular prism is shaded. What is the lateral surface area?

Answers

Answer:

28

Step-by-step explanation:

i think im right hope i helped

How to get to a negative exponent

Answers

u should be able to subtract off the plot but if not you have to trace them with invertables

The negative sign on an exponent means the reciprocal. Think of it this way,

just as a positive exponent mean repeated multiplication by the base, a negative exponent means repeated division by the base.

Example

So 2^ (-4)= 1 / (2^4)=1/(2*2*2*2)=1/16

So that answer would be 1/16

50 POINTS ILL GIVE BRAINLIEST !! RANDOM ANSWERS WILL BE REPORTED!!
Show two ways to simplify each expression. 1-6.

Answers

Answer:

Hope this helps :)

Step-by-step explanation:

15

(3^5)÷(3^5)

Simplify 3^5

243÷243

1

(3^5)÷(3^5)

3^5/3^5=3^5-5

3^5-5

3^5-5= 1

1

Formula: x^a/x^b=x^a-b

16

2^10/2^10

Cancel out 2^10

1

2^10/2^10

2^10/2^10=2^10-10

2^10-10

2^10-10=1

1

Formula: x^a/x^b=x^a-b

17

x^7/x^7x≠0

x≠0

18

(4x+2y)5÷(4x+2y)^5(4x+2y) ≠ 0

5/(4x+2y)^3 ≠ 0

5 ≠ 0

≠ =-y/2

19

No solution

20

p^4/p^4p ≠ 0

p≠ 0

no solution

Answer:

4.0303838 2938.3939 xxx

MARKED BRAINLIEST!!!! Olivia ate at the same restaurant four times. Each visit she ordered a salad and left a $1.50 tip. She spent a total of $54. Which equation would help you determine the cost of each salad, s?

4(s)+1.50=54

s+4(1.50)=54

4(s−1.50)=54

4(s+1.50)=54

Answers

answer: D 4(s+1.50)=54
Basically the tip is the same each of the 4 times so that’s just multiplying it by four then you have the salads which u don’t know “s” so that makes the equation

Another question! Thank you if you do help!

Answers

Answer:

b represents the number of biscuits Kat buys.

The maximum number of biscuits Kat can buy is 8.

Step-by-step explanation:

1.75b+11</=25

Suibtract 11 from both sides

1.75b </= 14

Divide both sides bu 1.75

b </= 8

1. the number of biscuits Kat buys
2. the maximum is 8

8 x 1.75 + 11 = 25
hope this helps :)

1. The point (-9, 2) is reflected across the x-axis. What are the coordinates of the reflection?
2. What is the distance between the points (8,-4) and (-5, -4)?
3. What is the distance between the points (-7,-5) and (-7, -8)?
4. A truck travels from warehouse A at (-4, 8) to warehouse B at (-4, -1). If each unit represents 20 miles
and the truck is traveling 60 miles per hour, how long will it take the truck to travel this distance?

Answers

1. (-9, -3)
2. 13
3. 3
4. 3 Hours
1number
2number
3
4number

A group of randomly selected members of The Foodies Food Club were asked to pick their favorite type of food. The bar graph below shows the results of the survey. There are 244 members in The Foodies.food. The bar graph below shows the results of the survey.

Based on the data, what is the most reasonable estimate for the number of The Foodies members whose favorite food type is Italian?

Choose 1 answer:
(Choice A)
A 62
(Choice B)
B 98
(Choice C)
C 112
(Choice D)
D 146

Answers

Answer:(choice b) b: 98

Step-by-step explanation:

Answer:

98

Step-by-step explanation:

Hope this helps!

help me with this thing, its for middle school math

Answers

Answer:

idek man

Step-by-step explanation:

The answer is A. You replace N with one of the numbers and square it. ex: if n = 1 then the answer/sum equals 1 because 1 squared is 1. If n = 2 then the answer/sum is 4 because 2 squared is 4, and so on.

Write the equation in point-slope form of the line that passes through the given point and has the given slope.
(4, -7); m = -1/4
Group of answer choices

y - 7 = -1/4(x - 4)

y+ 7 = 4(x - 4)

y - 4 = -1/4(x + 7)

y +7 = -1/4(x - 4)

Answers

Answer:

y + 7 = -1/4(x - 4)

Step-by-step explanation:

Answer:

y +7 = -1/4(x - 4)

Step-by-step explanation:

This should be right

Please help me with acellus

Answers

Answer:

x = 16

Step-by-step explanation:

4x - 2 = 3x + 14 ( being linear pair)

4x - 3x = 14 + 2

x = 16

Hope it will help :)

4. A stamp collector has some 15¢ stamps and some 20¢ stamps. The number of 15¢ stamps is eight less than three times the number of 20¢ stamps. The total value is $4. Find the number of each type of stamp in the collection. PLEASE SHOW WORK

Answers

Answer:

Step-by-step explanation: Let variable x represent the 15¢ stamps, and variable y represent 20¢ stamps.

x= 3y-8

0.15x+0.20y = 4

Replace x in the second equation by (3y-8)

0.15(3y-8) + 0.20y = 4

0.45y - 1.2 +0.20y = 4

Collect like terms;

0.45y+0.20y = 4+1.2

0.65y = 5.2

Divide both sides by 0.65 to solve for y;

y= 5.2/0.65

y = 8

Replace in equation " x=3y-8 " to solve for x;

x = (3*8) -8

x=24 - 8

x = 16

Therefore, the 15¢ stamps are 16 in number, and the 20¢ stamps are 8 in number.

Your answer must be simplified. Solve for x

Answers

Answer:

X can be any number but because there is a line under the greater than symbol x > -42

Step-by-step explanation:

-42/7=-6

Answer:

x>-42

Step-by-step explanation:

[tex] \frac{ x}{7} \geqslant - 6[/tex]

[tex]x \geqslant - 42[/tex]

I am confused *-* Oh and have a great day!

Answers

Answer:

Amelia rented a DVD and it was due to be returned on 26 November. She actually returned it to the shop on 12 December. The rental shop applies a fine of 9p for every day the DVD is overdue.

Work out the total fine paid by Amelia. Give your answer in £

I think it’s D but I’m not sure I hope it’s right

HELP QUICK PLS FAST!!!!!!!!!

Answers

Answer:

it would be 90

Step-by-step explanation:

The scale is 1:6. that means that the object is 6 times larger then the scale drawing.

Answer: 90

Explanation: the scale factor is 1:6 meaning the small object is 1 and the larger object is 6 multiple the small(15) by 6(the scale factor) and get 90.

HELP! Decide whether each table could represent a proportional relationship. if the relationship could be proportional, what would be the constant of proportionality?


a. Annie’s Attic is giving away $5 off coupons

|original price| sale price|

—————————————

|$15. | $10. |

—————————————

|$25. |$20. |

—————————————

|$35. |$30. |

————————————-


b. Bettie’s Boutique is having a 20% off sale.

|original price| sale price|

—————————————

|$15. | $12. |

—————————————

|$25. |$20. |

—————————————

|$35. |$28. |

————————————-

Original price is left of tables and sale price is right of tables

Answers

Answer:

The first one

Step-by-step explanation:

The slae price is $5 less  for everything in the first one.

The first one is the answer

are these ratios proportional? prove it
5/9 = 25/18
the / are fractions

Answers

5/9 = 25/18

Cross multiply:

5 * 18 = 9 * 25

Simplifying

5 * 18 = 9 * 25

Multiply 5 * 18

90 = 9 * 25

Multiply 9 * 25

90 = 225

Solving

90 = 225

No they are not

No they are not proportional

PLEASE HELP ASAP :( IENFIEN

Answers

Answer:

4. -9

Step-by-step explanation:

4. -9 i think i might be wrong

Gregor weighs 100 pounds. He climbs a 8 foot ladder in 10 seconds. What is Gregor's power output?

100 ft-lbs./sec
80 ft-lb./sec
8,000 ft-lbs./sec
800 ft-lbs./sec

ASAP

Answers

I’m gonna say 80? This may be wrong though.
i think it’s 80 also

Complete the equation of the line through (3,-1) and (4,7)


PLZ I really need help
I´m at this type of things

Answers

Answer:

y = 8x – 25

Step-by-step explanation:

Answer:

8x-25=y

Step-by-step explanation:

All we need is slope. (y2-y1)/(x2-x1). Now we just substitute values--(7+1)/1=8

Now we can plug in the slope as m, so

8x+b=y

Now all we have to do is plug in a point value and find B.

24+b=-1

Subtract 24 from both sides

b=-25

CHECK

32-25=7

Correct

The table shows the ticket prices for a space museum. Which expression represents the cost
for a group of a adults and s students to go to the museum?
18a + 14s
Space Museum
Ticket Prices
16 (a + s)
Adult
$18
(180 + 143)
(+8)
Student
$14
14a + 18s

Answers

Answer:14a + 18s

Step-by-step explanation:14a +18s

Answer:

14a + 18s

Step-by-step explanation:

Can you take a pic of your work nd attach it?

This is urgent.

Answers

Answer:

9

Step-by-step explanation:

Answer:

j = 9

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

5 /3 j=15

Step 2: Multiply both sides by 3/5.

( 3 /5 )*( 5 /3 j)=( 3 /5 )*(15)

j = 9

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