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Gennadij [26K]
3 years ago
11

Find two numbers with a sum of 20 and a difference of 6.

Mathematics
2 answers:
KonstantinChe [14]3 years ago
7 0

Answer:

13 and 7

Step-by-step explanation:

x + y= 20 -----(1)

x - y= 6 --------(2)

From equation 1,

x= 20-y

To substitute in equation 2, We say:

(20-y) - y=6

20 - 2y = 6

-2y = 6-20

2y = 14

Therefore, y = 7

To find x,

We substitute y in equation 1

Therefore, x + 7= 20

x = 20-7

Therefore x = 13.

This means the two numbers with a sum of 20 and a difference of 6 =

13 and 7.

Alina [70]3 years ago
4 0

Answer:

7 and 13

Step-by-step explanation:

x+y=20

x-y=6

2x=26, x=13, 13+7=20, 13-7=6.

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Agora chess club has 16 members and gains a new memeber every month. The key club has 4 members and gains 4 new members every mo
svlad2 [7]

Answer:

For chess club:

y1 = 16 + 1*x where y1=total number of members after x months  

For film club

y2 = 4 + 4*x where y2=total number of members after x months  

y1 = y2 at  

16 + x = 4 + 4x

3x = 12  

x = 4  

Therefore, after 4 months they the same number of members (equals 20 members, 16 + 1*4 or 4 + 4*4).


3 0
3 years ago
-43 – 9x = -7 – 3(5x + 6)<br> Answer?
lilavasa [31]

Answer:

Simplifying

9x + 7 = 5x + -3

Reorder the terms:

7 + 9x = 5x + -3

Reorder the terms:

7 + 9x = -3 + 5x

Solving

7 + 9x = -3 + 5x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-5x' to each side of the equation.

7 + 9x + -5x = -3 + 5x + -5x

Combine like terms: 9x + -5x = 4x

7 + 4x = -3 + 5x + -5x

Combine like terms: 5x + -5x = 0

7 + 4x = -3 + 0

7 + 4x = -3

Add '-7' to each side of the equation.

7 + -7 + 4x = -3 + -7

Combine like terms: 7 + -7 = 0

0 + 4x = -3 + -7

4x = -3 + -7

Combine like terms: -3 + -7 = -10

4x = -10

Divide each side by '4'.

x = -2.5

Simplifying

x = -2.5

make me brainiest plz!!!

Step-by-step explanation:

7 0
2 years ago
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Lois and Clark own a company that sells wagons. The amount they pay each of their sales employees (in dollars) is given by the e
ra1l [238]

Answer:

x=36° (180/5x because 2x+3x)

Step-by-step explanation:

7 0
2 years ago
Help needed with these for problems
Tatiana [17]
I can't read the first one and I also don't know
4 0
3 years ago
Question
creativ13 [48]

The cost to cover the cirular region with mud is about $2940

<h3>How to calculate area?</h3>

The circumference of the circular region is about 157 feet. Hence:

circumference = 2π * radius

157 = 2π * radius

Radius = 78.5 / π

The area is given as:

Area = π * radius² = π(78.5 / π)² = 1961.5 ft²

Cost = $1.5 * 1961.5 = $2940

The cost to cover the cirular region with mud is about $2940

Find out more on area at: brainly.com/question/25292087

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2 years ago
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