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yarga [219]
3 years ago
15

Find the difference. (-2ab-2a-5) - (6ab+2)

Mathematics
1 answer:
9966 [12]3 years ago
4 0

Answer:

-8ab - 2a - 7

Step-by-step explanation:

Since you're subtracting/adding I like taking away the parentheses which makes the equation: -2ab - 2a - 5 - 6ab - 2

You combine like terms and get:

-8ab - 2a - 7

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The sum of two numbers is 9 and the sum of their squares is 41. What is the larger number?
Sonbull [250]

The larger number is 5.

<u><em>Explanation</em></u>

Lets assume, the larger number is a and the smaller number is b

As the sum of two numbers is 9, so...

a+b= 9 ...............................(1)

Now, the sum of their squares is 41, so....

a^2 + b^2 = 41 .......................................(2)

First, solving equation (1) for b....

b=9-a

Now, plugging this b=9-a into equation (2) , we will get...

a^2 +(9-a)^2 = 41\\ \\ a^2 +81-18a+a^2 =41 \\ \\ 2a^2-18a+81 =41 \\ \\ 2a^2-18a+40=0\\ \\ 2(a^2 -9a+20)=0\\ \\ a^2 -9a+20=0\\ \\ (a-5)(a-4)=0\\ \\ a=5,4

If a=5 , then b=9-5=4

So, the larger number is 5.

5 0
4 years ago
Read 2 more answers
Calculate the perimiter of a regular pentagon with side length of 5 cm
avanturin [10]

Answer:

Regular pentagon

Solve for perimeter

P=25cm

a Side

5

cm

8 0
3 years ago
8/2=6/n+4 Solve for n
Reptile [31]

Answer:

No solution (because the n's cancel out!)

Step-by-step explanation:

Let's solve your equation step-by-step.

8

2

=

6

n

+4

Multiply all terms by n and cancel:

8n

2

=6+4n

4n=4n+6(Simplify both sides of the equation)

4n−4n=4n+6−4n(Subtract 4n from both sides)

0=6

Answer:

No solutions.

8 0
4 years ago
The equation the quantity of x plus 20 over 2 = 3x represents when two tutoring services with different rate plans charge the sa
victus00 [196]

The solution to the equation is x = 4

<h3>What are linear equations?</h3>

Linear equations are equations that have constant average rates of change. Note that the constant average rates of change can also be regarded as the slope or the gradient

<h3>How to determine the solution to the system?</h3>

A system of linear equations is a collection of at least two linear equations.

In this case, the equation is given as

(x + 20)/2 = 3x

Multiply both sides of the equation by 2

x + 20 = 6x

Subtract x from both sides of the equation

5x = 20

Divide both sides of the equation by 5

x = 4

hence, the solution to the equation is x = 4

Read more about equations at:

brainly.com/question/2972832

#SPJ1

7 0
2 years ago
a bicycle store costs 3000$ per month to operate, the store pays an average of $60 per bike. the average selling price of each b
lara31 [8.8K]

Answer:

they must sell 75 bikes each month to pay the $3000 they would need to sell 76 bikes to get over $3000. so... 76 x 40= $3040

Step-by-step explanation:

$100 - $60 = $40

$3000/40 = 75

6 0
3 years ago
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