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1 year ago

Does anybody know this? Evaluate the following expression using the correct order of operations.

Mathematics

1 answer:

krok68 [10]1 year ago

6 0

Answer:

-4

Step-by-step explanation:

Wehn dealing with order of operations, we can remember the expression PEMDAS, which stands for parentheses, exponents, multiplication, division, addition, and subtraction.

So, our first step in the above problem is the parentheses:

$2(3-5)^3+4(-4+7)\\2(-2)^3+4(3)$

The second step is exponents:

$2(-2)^3+4(3)\\2(-8)+4(3)$

The third step is multiplication:

$2(-8)+4(3)\\-16+12$

The fourth and final step is addition:

$-16+12\\-4$

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Bea orders takeout. she orders a drink that costs $2.50, an appetizer that costs $8.50, and a sandwich that costs $15.30. what w

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<h3>What are Percentages?</h3>

A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.

To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.

Given that Bea orders a drink that costs $2.50, an appetizer that costs $8.50, and a sandwich that costs $15.30.

Cost of the order

= Cost of a drink + Cost of an appetizer + Cost of a sandwich

= $2.50 + $8.50 + $15.30

= $26.3

Also, she needs to pay 7% sales tax and 20% tip, therefore, in total, we can write,

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= Cost of the order + 7% of Cost of the order + 20% of Cost of the order

= $26.3 + 0.07($26.3) + 0.20($26.3)

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= $33.401 ≈ $33.40

Hence, Bea's total will be $33.40.

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2 years ago

Find the domain of each function. (Enter your answers using interval notation.)(a) f(x)=8/(1+e^x) .(b) f(x)=5/(1−e^x)

Alexus [3.1K]

Answer:

domain is (-∞,∞)

(-∞,0) U(0,∞)

Step-by-step explanation:

$f(x)=\frac{1}{1+e^x}$

The domain is the set of x values for which the function is defined

In f(x) there is no restriction for x. the function is defined for all x values

so domain is (-∞,∞)

$f(x)=\frac{5}{1-e^x}$

The domain is the set of x values for which the function is defined

when x=0, e^0=1 that makes the denominator 0

Denominator 0 is undefined. So x cannot be 0

domain is (-∞,0) U(0,∞)

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Answer:

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