HELP ASAP HELP ASAP HELP ASAP HELP ADAP Find the values of m and n.

Louis wants to carpet the rectangular floor of his basement. The basement has an area of 980 square feet. The width of the basem

Serhud [2]

This problem requires a system of equations.

Let x be the length and y be the width.

xy = 980 x = 5y

Substitute 5y for x.

5y(y) = 980
5y² = 980
y² = 980/5
y² = 196
y = √196
y = 14 feet

Substitute 14 for y.

x = 5y
x = 5(14)
x = 70 feet

The length is 70 feet.

4 0

3 years ago

PLEASE HELP!!! ASAP I don't understand this!!!

Paladinen [302]

Answer by JKismyhusbandbae: So this is really simple. You are probably making this out harder than it needs to be. Consider the set of ordered pairs {(-1,0), (4,-5), (6,-6), (9,11), (10,14)}. This set of ordered pairs is a function because for each value of x there is one and only one y-value. This means that the x value never repeats. Therefore any function is a function when the x value never repeats.

Looking at the table we want to find all it's ordered pairs: (0,4), (1,2), (2,3), (3,9), (4,1).

F(2) is 3 so when x equals 2.

So the ordered pair is (2,3) 2 is the x value and the f(2) is 3.

7 0

4 years ago

PLS Determine the measures of angles x, y, and z:

zepelin [54]

Answer:

The answer is.

x=75

y=105

z=75

Step-by-step explanation:

6 0

3 years ago

Whats the sum of the exterior angles of a 35-gon

MariettaO [177]

The sum of all exterior angles will always add up to 360

3 0

3 years ago

Independent random samples taken on two university campuses revealed the following information concerning the average amount of

love history [14]

Answer:

$p_v =P(t_{88}>6.960) =2.91x10^{-10}$

So with the p value obtained and using the significance level given $\alpha=0.05$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the mean of the group A is significantly lower than the mean for the group B.

Step-by-step explanation:

The statistic to test the hypothesis is given by this formula:

$t=\frac{(\bar X_A-\bar X_B)-(\mu_{A}-\mu_B)}{\sqrt{\frac{s_A^2}{n_A}}+\frac{s_B^2}{n_B}}$

Where t follows a t distribution with $n_1+n_2 -2$ degrees of freedom

The system of hypothesis on this case are:

Null hypothesis: $\mu_A \leq \mu_B$

Alternative hypothesis: $\mu_A >\mu_B$

Or equivalently:

Null hypothesis: $\mu_A - \mu_B \leq 0$

Alternative hypothesis: $\mu_A -\mu_B>0$

Our notation on this case :

$n_A =50$ represent the sample size for group A

$n_B =40$ represent the sample size for group B

$\bar X_A =280$ represent the sample mean for the group A

$\bar X_B =250$ represent the sample mean for the group B

$s_A=20$ represent the sample standard deviation for group A

$s_B=23$ represent the sample standard deviation for group B

And now we can calculate the statistic:

$t=\frac{(280 -250)-(0)}{\sqrt{\frac{20^2}{50}}+\frac{23^2}{40}}=6.511$

Now we can calculate the degrees of freedom given by:

$df=50+40-2=88$

And now we can calculate the p value using the alternative hypothesis:

$p_v =P(t_{88}>6.960) =2.91x10^{-10}$

So with the p value obtained and using the significance level given $\alpha=0.05$ we have $p_v$ so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the mean of the group A is significantly lower than the mean for the group B.

8 0

3 years ago

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