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Is the line through points P(–7, 0) and Q(6, –5) parallel to the line through points R(–1, –1) and S(0, –4)? Explain. - PLEASE HELP ASAP. THANKS! - answers on image

Answers

Answer 1

Answer:

for that two lines be parallel the condition is that two slope be equal m1 = m2

Now you must calculate with point givens both slope , with the following formula

m= y2-y1/ x2-x1, for the firsts two points P( -7,0) and Q( 6,-5)

m = -5-0/6-(-7) , m = -5/13

for the seconds points R (-1,-1) and S( 0,-4)

m = -4-(-1)/ 0-(-1) = -3/1 = -3

the lines are not parallel, m1 ≠ m2

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Answers

Answer:

135

180

225

Step-by-step explanation:

It represents a function because each element in the domain is matched with exactly one element in the range.

I don’t get it ? How are you supposed to do it

Answers

If $A^3=I$ , then $A^3=AA^2=I$ which means $A$ and $A^2$ must be inverses of one another, so $(A^2)^(-1)=A$ and $A^(-1)=A^2$ , so $A$ must be invertible.

What is the difference x +5/ x +2 - x + 1/x ^2 + 2x?

Answers

ANSWER
The difference is,

$\frac{ {x}^(2) + 4x - 1}{ {x}^(2) + 2x}$

EXPLANATION

To find the difference, we just have to simplify the expression.

The given expression is

$(x + 5)/(x + 2) - \frac{(x + 1)}{ {x}^(2) + 2x}$

We factor the denominator of the second fraction to get,

$=(x + 5)/(x + 2) - ((x + 1))/( x( x+ 2))$

We can now see clearly that the LCM is

$x(x + 2)$

We collect LCM to get,

$=(x(x + 5) - (x + 1))/( x( x+ 2))$
We now expand the bracket to obtain,

$=\frac{ {x}^(2) + 5x - x - 1}{ {x}^(2) + 2x}$

This gives us,

$=\frac{ {x}^(2) + 4x - 1}{ {x}^(2) + 2x}$

The difference will be given by:
(x +5)/ (x +2) - (x + 1)/(x ^2 + 2x)
=(x +5)/ (x +2) - (x + 1)/[x (x + 2)]
the LCM is x(x+2)
thus the difference will be:
[x(x+5)-(x+1)]/(x (x + 2))
=[x^2+5x-x-1]/[x(x+2)]
=(x^2-4x-1)/[x(x+2)]

Answer:(x^2-4x-1)/[x(x+2)]

A null hypothesis is that the mean nose lengths of men and women are the same. The alternative hypothesis is that men have a longer mean nose length than women. A statistical test is done and the p-value is 0.225. Which of the following is the most appropriate way to state the conclusion? a. The mean nose lengths of the populations of men and women are identical. b. There is not enough evidence to say that the populations of men and women have different mean nose lengths. c. Men have a greater mean nose length. d. The probability is 0.225 that men and women have the same mean nose length

Answers

Answer:

b. There is not enough evidence to say that the populations of men and women have different mean nose lengths.

See explanation below.

Step-by-step explanation:

Develop the null and alternative hypotheses for this study?

We need to conduct a hypothesis in order to check if the means for the two groups are different (men have longer mean nose length than women), the system of hypothesis would be:

Null hypothesis: $\mu_(men) \leq \mu_(women)$

Alternative hypothesis: $\mu_(men) > \mu_(women)$

Assuming that we know the population deviations for each group, for this case is better apply a z test to compare means, and the statistic is given by:

$z=\frac{\bar X_(men)-\bar X_(women)}{\sqrt{(\sigma^2_(men))/(n_(men))+(\sigma^2_(women))/(n_(women))}}$ (1)

z-test: Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other.

Let's assume that the calculated statistic is $z_(calc)$

Since is a right tailed test test the p value would be:

$p_v =P(Z>z_(calc))=0.225$

And we know that the p value is 0.225. If we select a significance level for example 0.05 or 0.1 we see that $p_v >\alpha$

And on this case we have enough evidence to FAIl to reject the null hypothesis that the means are equal. So then the best conclusion would be:

b. There is not enough evidence to say that the populations of men and women have different mean nose lengths.

A box of cereal weighs 0.75 pounds. how many ounces are in 0.75 pounds? (1 lb = 16oz)

Answers

So we want to perform a change of units for the weight of a box of cereal. We will see that it weighs 12 ounces.

We know that it weighs 0.75 pounds, and we want to know how many ounces it weighs.

And we know that:

1 lb = 16 oz.

Then we can rewrite the weight as:

W = 0.75 lb = 0.75*( 1 lb) = 0.75*(16 oz) = 12 oz

So the box of cereal weighs 12 ounces.

If you want to learn more, you can read:

brainly.com/question/20008877

Answer:

Step-by-step explanation:

one cup is 8 ounces times three is 24

Points A, B, and C lie on line segment AC. The ratio of AB:BC is 3:7, and the length of AC = 120. What is the length of BC?

Answers

In terms of "ratio units," the length of AC is 3+7=10, so each one is worth 120/10 = 12. The length BC is 7 of those, or 7·12 = 84.

The ratio of AB:BC is 3:7
3 + 7 = 10
the length of AC = 120
so 120 / 10 = 12

BC = 7 x 12 = 84

Answer
The length of BC = 84

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