Question

A product has increased in price by 25%. Two discounts were granted on the sale. successive rates of 4% and 3.5%, leaving the final price at R$100.75. What was the initial price of this merchandise?

54

likes
268 views

Answer to a math question A product has increased in price by 25%. Two discounts were granted on the sale. successive rates of 4% and 3.5%, leaving the final price at R$100.75. What was the initial price of this merchandise?

Expert avatar
Dexter
4.7
113 Answers
1. Seja P_{\text{inicial}} o preço inicial da mercadoria.

2. Após um aumento de 25%, o preço se torna:

P_{\text{aumentado}} = P_{\text{inicial}} \times 1.25

3. Aplicando o primeiro desconto de 4%, o preço se torna:

P_{\text{desconto1}} = P_{\text{aumentado}} \times (1 - 0.04) = P_{\text{aumentado}} \times 0.96

4. Aplicando o segundo desconto de 3,5%, o preço final é:

P_{\text{final}} = P_{\text{desconto1}} \times (1 - 0.035) = P_{\text{desconto1}} \times 0.965

5. O preço final é dado como R$ 100,75. Portanto, temos:

100.75 = P_{\text{inicial}} \times 1.25 \times 0.96 \times 0.965

6. Simplificando, temos:

100.75 = P_{\text{inicial}} \times 1.1568

7. Resolvendo para P_{\text{inicial}} , obtemos:

P_{\text{inicial}} = \frac{100.75}{1.1568}

8. Aproximando o cálculo, temos:

P_{\text{inicial}}\approx87.00

O preço inicial da mercadoria era aproximadamente R$ 87.00

Frequently asked questions (FAQs)
What is the area of a rectangle with length 8 cm and width 12 cm?
+
What is the probability of rolling a number greater than 4 with a fair 6-sided die?
+
What is the solution to the inequality 3x + 2 > 8?
+
New questions in Mathematics
calculate the derivative by the limit definition: f(x) = 6x^3 + 2
Y=-x^2-8x-15 X=-7
What is the coefficient of elasticity of the material that must be placed on the heel of the 10 cm high clog, with a base area of 2 cm² so that it deforms only 2 cm when the force on it will be a maximum of 600 N.
3(2+x)-2(2x+6)=20-4x
Karina has a plot of 5000 square meters in which she has decided that 60% of it will be used to plant vegetables. Of this part, 12% will be dedicated to planting lettuce. How much surface area of the plot will be used to grow lettuce?
How many kilometers does a person travel in 45 minutes if they move at a rate of 8.3 m/s?
If L (-2, -5) reflected across y = -4. What are the coordinates of L?
Determine the equations of the recipes that pass through the following pairs of points P1 (2;-1) and p2 (4;-1)
Derivative of x squared
Suppose X has a Poisson distribution, with a mean of 0.4. Determine the probability that x is at most 2.
Which of the following is the product of multiplying twenty-seven and twenty-five hundredths by nine and twenty-seven hundredths?
Suppose 56% of politicians are lawyers if a random sample of size 564 is selected, what is the probability that the proportion of politicians who are lawyers will differ from the total politicians proportions buy more than 4% round your answer to four decimal places
224 × (6÷8)
The sum of two numbers is equal to 58 and the largest exceeds by at least 12. Find the two numbers
A company that manufactures personal hygiene items purchases machinery for $220,000 that is considered to last 7 years; it is estimated that at the end of the period it will have a salvage value of $1000. Find: to. The depreciation rate. b. The book value at the end of the sixth year.
If f(x,y)=6xy^2+3y^3 find (∫3,-2) f(x,y)dx.
What’s the slope of a tangent line at x=1 for f(x)=x2. We can find the slopes of a sequence of secant lines that get closer and closer to the tangent line. What we are working towards is the process of finding a “limit” which is a foundational topic of calculus.
A circular window has a rubber molding around the edge. If the window has a radius of 250 mm, how long is the piece of molding that is required ? (To the nearest mm)
nI Exercises 65-68, the latitudes of a pair of cities are given. Assume that one city si directly south of the other and that the earth is a perfect sphere of radius 4000 miles. Use the arc length formula in terms of degrees to find the distance between the two cities. 65. The North Pole: latitude 90° north Springfield, Illinois: latitude 40° north
7- A printing company found in its investigations that there were an average of 6 errors in 150-page prints. Based on this information, what is the probability of there being 48 errors in a 1200-page job?