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3 years ago

13

Jeffrey purchase and download 12 songs on Monday he purchase an additional 3 songs on Tuesday the cost to download each song is

$2 write a numeral expression to represent the situation

1 answer:

bonufazy [111]3 years ago

4 0

(12x3)+(3x2) Because on Monday he bought 12 songs for $3 each and on Tuesday he bought 2 songs for $3 each.

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The reciprocal 1/50 of is _____. Please Answer I need help!! You will get 30 points when/if you answer!

zimovet [89]

Answer:

50/1 or 50.

Step-by-step explanation:

To get the reciprocal of a fraction you just need to flip it.

4 0

3 years ago

Identify the focus, directrix, and axis of symmetry of 11x=y^2

ale4655 [162]

<u>Answers </u>

focus: (0, $\frac{11}{4}$ )

directrix: x = $-\frac{11}{4}$

AOS: y = 0

<u>Step-by-step explanation:</u>

11x = y²

x = $\frac{1}{11}$ y²

x = $\frac{1}{11}$ (y - 0)² + 0

Vertex: (0, 0)

Axis of symmetry: y = 0

Focus: $\frac{1}{4p} = a$ a = $\frac{1}{11}$

$\frac{1}{4p} = \frac{1}{11}$

4p = 11

p = $\frac{11}{4}$ so, focus is: (0, $\frac{11}{4}$ )

Directrix: -p = $-\frac{11}{4}$ so, directrix is: x = $-\frac{11}{4}$

8 0

2 years ago

74% of 19 year old males are atleast 172 pounds , what percent of the males are not atleast 172 pounds?

swat32

Answer:

<em>The percentage of males are not at least 172 pounds</em>

P(X⁻ ≥ 172) = 0.26

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given that 74% of 19 -year -old males are at least 172 pounds

Let 'X' be a random variable in a binomial distribution

P( X≥172) = 74% = 0.74

<em>we have to find that the percentage of males are not at least 172 pounds</em>

<u><em>Step(ii):-</em></u>

<em>The probability of males are not at least 172 pounds</em>

P(X⁻≥172) = 1- P( X≥172)

= 1- 0.74

<em> = 0.26</em>

<u><em>Final answer:-</em></u>

<em>The percentage of males are not at least 172 pounds</em>

P(X⁻ ≥ 172) = 0.26

<u><em></em></u>

7 0

2 years ago

Select the equivalent expression.<br> (3^-8 • 7^3)^-2 =?

melomori [17]

I’m pretty sure answer is A and i’m

3 0

3 years ago

Read 2 more answers

What is the equation when y=5x+4 is reflected over the x-axis, y-axis & y=x?

tigry1 [53]

Answer:

A) $y=-5x-4$

B) $y=-5x+4$

C) $y=\frac{x-4}{5}$

Step-by-step explanation:

So we have the equation:

$y=5x+4$

Let's write this in function notation. Thus:

$y=f(x)=5x+4$

A)

To flip a function over the x-axis, multiply the function by -1. Thus:

$f(x)=5x+4\\-(f(x))=-(5x+4)$

Simplify:

$-f(x)=-5x-4$

B) To flip a function over the y-axis, change the variable x to -x. Thus:

$f(x)=5x+4\\f(-x)=5(-x)+4$

Simplify:

$f(-x)=-5x+4$

C) A reflection over the line y=x is synonymous with finding the inverse of the function.

To find the inverse, switch x and f(x) and solve for f(x):

$f(x)=5x+4$

Switch:

$x=5f^{-1}(x)+4$

Subtract 4 from both sides:

$x-4=5f^{-1}(x)$

Divide both sides by 5:

$f^{-1}(x)=\frac{x-4}{5}$

And we're done :)

7 0

2 years ago