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jeka94
3 years ago
7

Mikayla bought five shirts at $x three of the five came with a matching top for an additional $9 each. Write and simplify an exp

ression that represents the total cost of her purchase
Mathematics
2 answers:
maria [59]3 years ago
5 0

Answer:

The simplified expression that represents the cost of her purchase is "5x + 27"

Step-by-step explanation:

Since Mikayla bought five shirts each costing $x we need to multiply the number of shirts by the cost, so 5*x, but since three of these shirts came with and additional top that costs $9 we need to take those into account. So the expression that represents the cost of her purchase is:

cost of purchase = 5*x + 3*9

cost of purchase = 5x + 27

LenaWriter [7]3 years ago
3 0

Answer:

5x + 27

Step-by-step explanation:

Since Mikayla bought five shirts each costing $x it would be 5x

->if  three of the five came with a matching top for an additional $9 each, it would be 3 x 9.

therefore, the expression that represents the cost of her purchase is:

Total cost of purchase = 5x + (3 x 9)

Total cost of purchase = 5x + 27

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Answer:

z-score = 4.43,

It is a Good day

Step-by-step explanation:

The provided information is:

Mean = $28,286.28

Standard deviation = $1,500

Let x be the sell of department store on Tuesday.

Then, x = $34,924.62

The z-score is define as:

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Thus, the Tuesday's z-score is 4.43. So this is usually good day.

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3 years ago
What is the value of a1 of the geometric series? Sigma-Summation Underscript n = 1 Overscript infinity EndScripts 12 (negative o
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Answer:

12

Step-by-step explanation:

The given geometric series is

\sum_{n = 1}^{ \infty} 12( { -  \frac{1}{9} })^{n - 1}

We want to determine the first term of this geometric series.

Recall that the explicit formula is

a_{n} = 12( { -  \frac{1}{9} })^{n - 1}

To find the first term, we put n=1 to get:

a_{1} = 12( { -  \frac{1}{9} })^{1 - 1}

This gives us:

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3 years ago
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ANSWER

211.2 {in}^{2}

EXPLANATION

The surface area of a triangular prism is

equal to the area of two triangular faces

plus the area of the three rectangular faces.

The area of the equilateral triangle is calculated using the formula:

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3 years ago
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Answer:

∫((cos(x)*dx)/(√(1+sin(x)))) = 2√(1 + sin(x)) + c.

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Let u = 1 + sin(x).

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Substitute u = 1 + sin(x) and dx = du/cos(x) in the integral.

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Use an online converter but there is something you should know

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Converting measurements in the imperial system by memory is very hard, but converting measurements in the metric system is more simple.

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