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3 years ago

And please explain it?

Mathematics

1 answer:

Brums [2.3K]3 years ago

4 0

You probably jsut need to use law of cosines in order to solve for angle A

$c^2 = a^2+b^2 -2ab \cos C$
or
$a^2 = c^2+b^2 -2cb \cos A$

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Please answer this question

Natasha2012 [34]

Answer:

2. 8/5

Step-by-step explanation:

It is 8/5 because to find the slope for (4, -7) and (9, 1), you just need to find the difference. So you do 9-4= 5 and then 1- (-7)= 8, and since it is y over x, you put 8 over 5 and get 8/5.

3 0

3 years ago

which is the equation of the given line in slope-intercept form a. y = -1/4x 1 b. y = -4x 1 c. y = 4x - 1 d. y = 4x 1

Delvig [45]

C. demonstrates an equation given in slope-intercept form because it has the y on one side of the equation and the slope on the other along with the y intercept.

3 0

3 years ago

In the figure below, ∆ABC ~ ∆QRS.

sergiy2304 [10]

QS/AC=6/60=1/10

QR/AB=QR/50=1/10

QR=5

SO THAT TRIANGLE ABC IS EQUAL TO TRIANGLE QRS(2SIDES PROPORTIONAL.INC. ANGLE)

5 0

2 years ago

Read 2 more answers

If you drive 8 miles south then make a left turn and drive 6 miles east how far are you in a straight line from your starting po

olganol [36]

Answer:

10 miles

Step-by-step explanation:

d=√8²+6²=√100= 10 miles

4 0

3 years ago

The inspection division of the Lee County Weights and Measures Department is interested in estimating the actual amount of soft

cluponka [151]

Answer:

The 98% confidence interval estimate of the true average amount of soft drink in each bottle is between 2.97 liters and 3.01 liters.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 64 - 1 = 63

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 63 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.98}{2} = 0.99$ . So we have T = 2.387

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.387\frac{0.06}{\sqrt{64}} = 0.02$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 2.99 - 0.02 = 2.97 liters

The upper end of the interval is the sample mean added to M. So it is 2.99 + 0.02 = 3.01 liters

The 98% confidence interval estimate of the true average amount of soft drink in each bottle is between 2.97 liters and 3.01 liters.

7 0

3 years ago