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3 years ago

HELP PLEASE!!!

1 answer:

8 0

A^2 + b^2 = c^2.....a and b are the legs and c is the hypotenuse
41^2 + 40^2 = c^2
1681 + 1600 = c^2
3281 = c^2...take sqrt of both sides, eliminating the ^2
sqrt 3281 = c
57.28 ...rounds to 57 = c

so the 3 sides of ur triangle are 57,41,and 40. The perimeter is all three sides added together. So the perimeter is : 57 + 40 + 41 = 138 ft <==

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Systems of equations 2x+2y=16 2x+6y=28

Sholpan [36]

2x+2y=16
2x+6y=28

all you have to do is subtract to get rid of the 2x and solve for y

2x+2y = 16
-2x-6y = -28
---------------------------
0 -4y = -12
y = 3

now we got y we can plug in or do the systems of equation again and find x. lets do systems of equations again.

2x+2y=16
2x+6y=28

this time i am going to multiple the top by -3 and then add the equations hopefully it is clear why I multiple by -3

-3(2x+2y = 16)
2x +6y = 28

-6x - 6y = -48
2x +6y = 28
------------------------
-4x + 0y = -20

x = 5

4 0

4 years ago

Read 2 more answers

F=f (1-v/s) change the subject of the formula into v

Artyom0805 [142]

Changing the subject of the formula into v means expressing v in terms of the other given variables. So given the original equation, as shown below, we can rearrange it so that we have v isolated on one side.

$F = f(1 - \frac{v}{s})$
$\frac{F}{f} = 1 - \frac{v}{s}$
$\frac{v}{s} = 1 - \frac{F}{f}$

To isolate v, we can just multiply s to both sides and come up with the final equation below.

$v = s(1 - \frac{F}{f})$

Thus, we have v = s(1 - F/f) with v as the subject of the formula.

Answer: v = s(1 - F/f)

8 0

3 years ago

The median number of omelets made by 5 chefs during a certain Sunday brunch is 13. The range of number of omelets made by those

Verizon [17]

This would be false because the difference in the highest and lowest numbers are 4.

7 0

3 years ago

Read 2 more answers

Josie has $47 left on her checking account. If she writes a check for $55,

kozerog [31]

Answer:

-8

Step-by-step explanation:

47-55=-8

3 0

2 years ago

Read 2 more answers

David didn’t study for his introduction to logic exam consisting of 15 true-false questions. He did blind guessing on each quest

MakcuM [25]

Answer:

a) 0.1509

b) 0.8314

Step-by-step explanation:

Since there are only two options for each question, the probability that he guesses right is p = 0.50, and the probability that he guesses wrong is q = 0.50

There is a total of 15 questions in the test so we can use the formula for a binomial distribution with parameters n = 15, p = 0.5, q = 0.5

a) If he needs to score 10 or more correct to pass, what is the probability that he will fail the exam?

To find this probability we will need to find the probability:

P ( X < 10) or

(1 - P (x ≥10))

Remember that the formula for a binomial distribution is:

$P(x) = \left[\begin{array}{ccc}n\\x\end{array}\right] p^{x} q^{n-x}$

We can solve this by using the parameters given before and make x = 10, 11, 12, 13, 14, 15 and use the formula:

P(he fails the exam) = 1 - P (x≥10)

= 1 - (P(x=10) + P(x=11) + P(x=12) + P(x=13) + P(x=14) + P(x=15))

= 0.1509

b) Find the probability that he answers 6 to 11 inclusive)

We're going to use the same formula but we will do:

P (x = 6) + P (x = 7) + P (x = 8) + P (x = 9) + P (x = 10) + P (x = 11)

=0.1527 + .1964 + .1964 + 0.1527 + 0.0916 + 0.0416

= 0.8314

Therefore the probability that he answers 6 to 11 inclusive is 0.8314

4 0

3 years ago