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2 years ago

Please help me answer this question

Mathematics

1 answer:

I am Lyosha [343]2 years ago

8 0

9514 1404 393

Answer:

D. -17%

Step-by-step explanation:

The change from March to April is (April - March) = (100 -120) = -20. As a fraction of the March bill, that is ...

-20/120 = -1/6

As a percentage, that change is ...

-1/6 × 100% ≈ -16.667% ≈ -17%

The electric bill changed by about -17% from March to April.

_____

<em>Additional comment</em>

Water went up 4%; groceries went up about 14%, and restaurant changed by -15%.

The percentage change is found by ...

% change = ((new amount)/(original amount) -1) × 100%

Above, we have rearranged this to ...

% change = ((new amount) -(original amount))/(original amount) × 100%

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3 years ago

Select the correct answer. which expression is equivalent to the given expression? assume the denominator does not equal zero. a

Alexxandr [17]

If the denominator does not equal 0, the equivalent expression of $\frac{14x^4y^6}{7x^8y^2}$ is $\frac{2y^{4}}{x^{4}}$ $\frac{x^{10} y^{14}}{729}$

<h3>How to determine the equivalent expression?</h3>

The expression is given as:

$\frac{14x^4y^6}{7x^8y^2}$

Divide 14 by 7

$\frac{14x^4y^6}{7x^8y^2} = \frac{2x^4y^6}{x^8y^2}$

Apply the law of indices

$\frac{14x^4y^6}{7x^8y^2} = \frac{2y^{6-2}}{x^{8-4}}$

Evaluate the differences in the exponents

$\frac{14x^4y^6}{7x^8y^2} = \frac{2y^{4}}{x^{4}}$

Hence, the equivalent expression of $\frac{14x^4y^6}{7x^8y^2}$ is $\frac{2y^{4}}{x^{4}}$

Read more about equivalent expressions at:

brainly.com/question/2972832

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2 years ago

the sum of two numbers is 21. the secound number is six times the first number. work out the two numbers?

Assoli18 [71]

The numbers are 3 and 18

Step-by-step explanation:

Step 1: Given details are sum of numbers = 21, let the numbers be x and y. Form equations out of the given details.

⇒ x + y = 21 ---- (1)

⇒ y = 6x --------- (2)

Step 2: Substitute (2) in (1)

⇒ x + 6x = 21

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Step 3: Find the value of y using x

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3 years ago

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3 years ago

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Step-by-step explanation:

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3 years ago

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