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Alik [6]
2 years ago
5

Sianna bought 3 pens, 4 notebooks, and a calculator. The calculator cost $25. If x represents the cost of each pen and y represe

nts the cost of each notebook, which expression represents the amount of change Sianna should receive from $50?
3x + 4y +25

50 – (3x + 4y)
50 – (3x + 4y + 25)
3x + 4y + 25 + 50
Mathematics
1 answer:
Mrrafil [7]2 years ago
3 0

Answer:

50 – (3x + 4y + 25)

Step-by-step explanation:

To see how much change she is gonna receive we need to find how much she spent on the items and add them all up:

The calculator was $25

The price of pens and notebooks are unknown so they are represented with x and y respectively.

With given information we can write the following equation to see the change she will receive:

50 – (3x + 4y + 25)

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The first three terms of a sequence are given. Round to the nearest thousandth (if
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The 7th term of the sequence to the nearest thousandth is 223.949

<h3>What are geometric sequences?</h3>

These are sequence that increases in an exponential form.

The formula for calculating the nth term of a geometric sequence is expressed as:

Tn = ar^n-1

Given the following parameters

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r = 1.2

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Substitute the given parameter into the formula

T7 = 75(1.2)^6
T7 = 223.949

Hence the 7th term of the sequence to the nearest thousandth is 223.949

Learn more on geometric sequence here: brainly.com/question/9300199

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3 years ago
How does the graph of y = sec(x + 3) – 7 compare with the graph of y = sec(x)?
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Answer:

The function y = sec(x) shifted 3 units left and 7 units down .

Step-by-step explanation:

Given the function: y = sec(x)

  • If k is any positive real number, then the graph of f(x) - k is  the graph of y = f(x) shifted downward k units.
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The function y = \sec(x+3)-7 comes from the base function y= sec(x).  

Since 3 is added added on the inside, this  is a horizontal shift Left 3 unit, and since 7 is subtracted on the outside, this is a vertical shift  down 7 units.

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Put together, Dulcina and Tremaine have 129 total matchbooks. Tremaine's collection has 39 fewer matchbooks in it than Dulcina's
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Answer:

Let the Dulcina's collection be 'x'

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2x = 129 +39

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Dulcina's collection = x = 84

Tremaine's collection = x - 39 = 84 - 39 = 45

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3 years ago
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