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Marianna [84]
3 years ago
7

Molly has 4x + $10 and Ron has 20 - 5 x dollars how much money do they have altogether and how much money does Molly have been R

on
Mathematics
2 answers:
Debora [2.8K]3 years ago
7 0
1. Do the opposite of addition (subtraction)

4x - 10 - (-5x + 20)

2. Change this equation (-5x - 20) into a positive (5x + 20)

4x - 10 + 5x - 20

9x - 10
pickupchik [31]3 years ago
6 0
Subtract them, just like you added: 
4x + 10 - (-5x +20) 
The minus turns (-5x + 20) into the opposite, or 5x - 20 
4x + 10 + 5x - 20 
9x - 10
I really hope this helps. 
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Answer:

22.2710574513

Step-by-step explanation:

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3 years ago
The length of a rectangle in centimeters is two more than thrice its width. a) Write an expression, in the simplest form, for th
Karo-lina-s [1.5K]

Answer:

Perimeter of the rectangle = 8 x +4

Length of the rectangle = 12 units.

Step-by-step explanation:

Let the width of the rectangle as 'x' units.

So, length of the rectangle is 2 more than 3 x.

We can set up expression for length as 3 x+2.

Now, perimeter is sum of all side lengths of the rectangle.

So, perimeter = x+x+3 x+2 +3 x+2

Combine like terms,

Perimeter = 8 x+4

Now, it is given perimeter is 36cm

So,

8 x+4=36

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8 x=32

Divide both sides by 8

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So, width of the rectangle =4

Length =3(4) +2=14

3 0
3 years ago
After I add up all the numbers and divide them what do I do after?
Novosadov [1.4K]
When finding the mean you add up the numbers that are needed to find the mean and divide them by the amount of numbers you added. For example question 5 you will add 58+58+62+55+49+48 which will equal 330 and then divide it by 6 because there are 6 numbers which is 55.

4 0
3 years ago
The perimeter of a rectangle is 152m. If the length is one morethan twice of its width. Find the length and width of rectangle.​
sergejj [24]

Step-by-step explanation:

Perimeter of a Rect.= 2(l+b)

b= x

l= 2x

Equation

152= 2(2x+x)

152= 2(3x)

152= 6x

x= 25.33

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Therefore length is 50.66m and breadth is 25.33m

3 0
3 years ago
2(2x-3) + 3(x + 1) = 5x +2
Lerok [7]
X=5/2 , remove parentheses , collect like terms, move terms , collect like terms and calculate the sum , then divide both sides by 2 , hope this helped broski
5 0
3 years ago
Read 2 more answers
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