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3 years ago

The price of an item yesterday was $135 . Today, the price rose to $216 . Find the percentage increase.

Mathematics

2 answers:

saveliy_v [14]3 years ago

6 0

Answer:

Percentage Increase = 60%

Step-by-step explanation:

To find the percentage increase, we will use the formula below;

Percentage Increase = $\frac{Increase}{Initial cost}$ × 100%

From the question given, the initial cost = $ 135

Now, we need to find the increase;

Increase = $216 - $135 = $81

We can now proceed to insert the values and then simplify;

Percentage Increase = $\frac{Increase}{Initial cost}$ × 100%

= $\frac{81}{135}$ × 100%

= $\frac{8100}{135}$ %

=60%

Percentage Increase = 60%

Softa [21]3 years ago

5 0

Answer:

60% increase

Step-by-step explanation:

Work out the difference increase between the two numbers you are comparing.Then you increase the new number by the original number. Next you divide the increase by the original number and multiply the answer by 100. Finally divide the increase number and the original number then multiply by 100. That will give you your answer.

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Answer:

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Step-by-step explanation:

The cost equation is given as:

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This is a quadratic equation in general form, which is:

$y=ax^2+bx+c$

Matching, we can say:

a = 0.04

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Rounding off to nearest whole number, we can say:

Manufacturers has to produce 63 DVD/Blu-Ray players to achieve a minimum cost of $644

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stira [4]

Answer:

$\displaystyle \frac{7x^2 + 4x - 20}{5x + 10} = \frac{7x - 10}{5}, x \neq -2$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms/Coefficients

Factoring

Calculus

Discontinuities

Removable (Holes)
Jump (Piece-wise functions)
Infinite (Asymptotes)

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{7x^2 + 4x - 20}{5x + 10}$

Step 2: Simplify

[Frac - Numerator] Factor quadratic: $\displaystyle \frac{(7x - 10)(x + 2)}{5x + 10}$
[Frac - Denominator] Factor GCF: $\displaystyle \frac{(7x - 10)(x + 2)}{5(x + 2)}$
[Frac] Divide/Simplify: $\displaystyle \frac{(7x - 10)}{5}, x \neq -2$

When we divide (x + 2), we would have a removable discontinuity. If we were to graph the original function, we would see at x = -2 there would be a hole in the graph.

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Step-by-step explanation:

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