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zaharov [31]
4 years ago
12

Please help with this

Mathematics
1 answer:
sergiy2304 [10]4 years ago
5 0

a. r + (-s) = r - s

b. r - (-s) = r + s

c. -r + (-s) = -r - s

d. -r - (-s) = -r + s

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لیست داده و
choli [55]

Given parameters:

Cost price of the article = Nu.28.30

Selling price of the article  = Nu.29.30

Unknown:

Gain percentage = ?

The gain percentage is the same as the percentage profit on a trade.

The formula is given as:

       Gain percentage  = \frac{Profit}{Cost price}  x 100

         Profit = Selling price  - Cost price

                   = Nu.29.30 - Nu.28.30  

                   = Nu. 1

Now input the parameters and solve;

            Gain percentage  = \frac{1}{28.3} x 100

                                          = 3.5%

The gain percent is  3.5%

3 0
3 years ago
How can you use expressions to find the percent of a number?
netineya [11]

Answer:

Review how to find the percent of an amount to find the percent of an amount or of a whole we write

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
What ia the answer to this equation 51 + 3j =129​
marta [7]

Answer:

j = 26

Step-by-step explanation:

129 - 51 = 78

78 ÷ 3 = 26

Your answer is j = 26

4 0
3 years ago
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For brainiest:):):):):):):):):)
Bond [772]

Answer: $7,488

Step-by-step explanation:

For answer B:

The formula for the new balance would be A=P(1 + r)t

A = new balance

P = principal balance -> $900

r = rate (in decimal form)

t = time in years -> 8 years

To find the rate, convert 4% to decimal  

4/100 = 0.04

A=P(1+ r)t  

A=900(1+0.04)8

A=900(1.04)8

A=$7,488

5 0
3 years ago
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Solving systems of equations by substitution -2x-3(6-11)=-7
Papessa [141]

Answer:

11

Step-by-step explanation:

Simplify both sides of the equation.

Subtract 15 from both sides.

Divide both sides by -2.

x = 11

3 0
3 years ago
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