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Neporo4naja [7]

4 years ago

11

PlZZ explain. I"m confused.

1 answer:

ivann1987 [24]4 years ago

6 0

Step-by-step explanation:

when you put the number and the square root in the calculator, always at the same time, you should either get a number with a bunch of numbers after the decimal point or not very many. for example, a rational number could be $\sqrt{9$ = 3 where as the numbers could be multiplied (3x3=9). and a irrational number is like $\sqrt{5$ = 2.2360679775, so they cannot be multiplied to get 5. hope this helps!

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Isabella went into a movie theater and bought 3 drinks and 10 pretzels, costing a total of $54.50. Jason went into the same movi

ruslelena [56]

The price of 1 drink is $ 4 and price of 1 pretzel is $ 4.25

<em><u>Solution:</u></em>

Let d" be the price of 1 drink

Let "p" be the price of 1 pretzel

Given that, Isabella went into a movie theater and bought 3 drinks and 10 pretzels, costing a total of $54.50

<em><u>Therefore, we can frame a equation as,</u></em>

3 x price of 1 drink + 10 x price of 1 pretzel = 54.50

$3 \times d + 10 \times p = 54.50$

3d + 10p = 54.5 ---------- eqn 1

Jason went into the same movie theater and bought 9 drinks and 5 pretzels, costing a total of $57.25

9 x price of 1 drink + 5 x price of 1 pretzel = 57.25

$9 \times d + 5 \times p = 57.25$

9d + 5p = 57.25 ---------- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

Multiply eqn 1 by 3

9d + 30p = 163.5 ----- eqn 3

<em><u>Subtract eqn 2 from eqn 3</u></em>

9d + 30p = 163.5

9d + 5p = 57.25

( - ) -----------------------

25p = 106.25

p = 4.25

<em><u>Substitute p = 4.25 in eqn 1</u></em>

3d + 10(4.25) = 54.5

3d + 42.5 = 54.5

3d = 54.5 - 42.5

3d = 12

d = 4

Thus price of 1 drink is $ 4 and price of 1 pretzel is $ 4.25

4 0

3 years ago

A line passes through the points (-3, 9) and (-1, 3). What is its equation in slope-intercept form?

kobusy [5.1K]

Answer:

y= -3x

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Simplify: 8n-7y-12n+5-3y

professor190 [17]

8n−7y−12n+5−3y

=8n+−7y+−12n+5+−3y

Combine Like Terms:

=8n+−7y+−12n+5+−3y

=(8n+−12n)+(−7y+−3y)+(5)

=−4n+−10y+5

3 0

3 years ago

Read 2 more answers

Guess please help i’m so desperate

forsale [732]

Answer:

$P(x) = x^2+24x+5$

Step-by-step explanation:

<u>Functions</u>

In a function, an independent variable, let's call it x is related to a dependent variable y and it can be expressed as:

y = f(x)

Let's consider the functions given in the question, where the equation that represents a company's yearly sales is:

$S(x)=2x^2+24x$

And the equation that represents the same company's yearly expenses is:

$E(x)=x^2-5$

The company's profit function P(x) can be found as the difference between S(x) and E(x), thus:

$P(x) = S(x)-E(x)=2x^2+24x-(x^2-5)$

Operating:

$P(x) = 2x^2+24x-x^2+5$

Simplifying, the profit function for this company is:

$\boxed{P(x) = x^2+24x+5}$

8 0

3 years ago

7.<br> If cos θ= 0.866, find θ, writing your answer to the nearest degree.

Bumek [7]

See attachment for reply and answer.

7 0

3 years ago