PLEASE HELP ME ON THIS ONE!!! I REALLY NEED HELP!!!<br>SOMEONE PLEASE!!

ira [324]

She has spent $4.80, $2.40 on each fruit, to be equal with mangos, since pineapples are cheaper then you have to multiply that as much times until you get equal with multiplying the mangos

3 0

3 years ago

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Use algebraic methods to prove that the given function has an x-intercept that is equal to its y-intercept. In your final answer

Llana [10]

Given the function, y = x/( x^2 – 1)

Add x and subtract x from (x^2 – 1) to make it a complete square

y = x/(x^2 + x – x – 1)

y = x/[x(x + 1) – 1(x + 1)]

y = x/[(x – 1)(x + 1)]

In order to find the y -intercept, we set x = 0

When x = 0

y = 0/[(0 – 1)(0 + 1)]

y = 0.

Therefore, the y-intercept is zero.

In order to find the x -intercept, we set y = 0

When y = 0

0 = x/[(x – 1)(x + 1)]

The only way the product of a division will be zero is if the numerator is zero

So, if x/[(x – 1)(x + 1)] = 0

x = 0

Therefore, the x-intercept is also zero.

Since both x- intercept and y- intercept equal zero,

Then, the given function has an x-intercept that is equal to its y-intercept

5 0

3 years ago

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Plzzzzzzzzz.helppppppppp.meeeeeeeee

Lapatulllka [165]

It’s 9 cause 9x3=27
hhhhhhhhhhhhhhhhh

5 0

4 years ago

The city of Omaha decided to build a new parking garage in hopes of luring more people to the Old Market district.The city will

dimulka [17.4K]

Answer:

Given:

Mean, u = 135

Sample size, n = 42

Sample mean, x' = 126

Standard deviation = 16

Significance level = 0.05

1) The null and alternative hypotheses:

H0 : u = 135 (the revenue per day is $135)

H1 : u < 135 (the revenue per day is less than $135)

2) In this case, we have a left tailed test.

Let's use the formula:

$= \frac{x' - u}{s/ \sqrt{n}} = \frac{126 - 135}{16 / \sqrt{42}} = -3.645$

t = - 3.645

Critical value: at a significance level of 0.05, left tailed test,

tcritical = -1.683

We reject null hypothesis, H0, since t calculated, -3.645 is less than tcritical, -1.683.

3) Given, a = 0.05, df = 41, left tailed test,

t-value = 2.02

For the corresponding confidence interval, we have:

$CI = (x' - \frac{t * \sigma}{\sqrt{n}}, x' + \frac{t * \sigma}{\sqrt{n}})$

$CI = (126 - \frac{2.02 * 16}{\sqrt{42}}, 126 + \frac{2.02 * 16}{\sqrt{42}})$

CI = (121.014, 130.986)

4) Conclusion:

We reject the estimated potential revenue advised by the consultant, H0, as it is too high, because the t-calculated falls in rejection region(i.e, less than critical value), also the upper limit of the confidence interval is less than $135.

5 0

3 years ago

Which can be used to prove that lines l and m are parallel? A) same-side exterior angle theorem B) converse of the alternate int

Debora [2.8K]

Option B, C, D

Out of four given options following three options are used to prove line l and m are parallel.

B) Converse of the alternate interior angles theorem

C) Converse of the same-side interior angles theorem

D) Converse of corresponding angles postulate

<u>Solution: </u>

Need to check which theorem out of four given theorem can be used to prove two lines are parallel

Lets check first what each theorem says.

A ) Same-side exterior angle theorem says that when a transversal line intersects two parallel lines , same side exterior angles are supplementary. So first condition to apply is that two lines should be parallel and this first condition is used to say same side exterior angles are supplementary. So cannot use Same-side exterior angle theorem to prove two lines are parallel.

B) Converse of the alternate interior angles theorem : this theorem says when two lines intersected by transversal forms equal alternate interior angles then two lines are parallel. So yes this can use to check or prove that l and m are parallel by drawing a transversal intersecting l and m and checking alternate interior angles.

C ) Converse of the same-side interior angles theorem: this theorem says when two lines intersected by transversal forms supplementary same side interior angles then two lines are parallel. So yes this can use to check or prove that l and m are parallel by drawing a transversal intersecting l and m and checking same side interior angles.

D) Converse of corresponding angles postulate: this postulate says when two lines intersected by transversal forms congruent corresponding angles then two lines are parallel. So yes this can use to check or prove that l and m are parallel by drawing a transversal intersecting l and m and checking corresponding angles.

Hence out of four given options following three options are used to prove line l and m are parallel.

B) Converse of the alternate interior angles theorem

C) Converse of the same-side interior angles theorem

D) Converse of corresponding angles postulate

3 0

3 years ago

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PLEASE HELP ME ON THIS ONE!!! I REALLY NEED HELP!!!SOMEONE PLEASE!!