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3 years ago

√x²-10x+25 if -5≤x<5

Mathematics

1 answer:

Olin [163]3 years ago

3 0

Answer:

4664g vk88545 hkdd57 ghj

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How long is a high school football game on average? I wanted to know about how long a high school football game lasts from start

Oksi-84 [34.3K]

I think its around the same time as an average NFL game so probably 2 maby 3 hours long

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3 years ago

Which letter shown has only ONE line of symmetry?<br> A) A <br> B) B <br> C) C <br> D) D

stich3 [128]

Answer:

I think you have it right with C

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Francois baked just enough cookies to fill all the orders at his bakery. While the cookies were cooling, a kitchen assistant kno

galben [10]

I'm guessing the question is how many total cookies were baked.
36 = .12 x *** x being the total number of cookies
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3 years ago

Read 2 more answers

Precalculus PLEASE HELP ME right answers only check all please

Alex_Xolod [135]

Given :

$cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=-\frac{\sqrt{2}}{2}$

We know the identity

$cos(x)cos(y) + sin(x)sin(y)=cos(x-y)$

We use this property to simplify the left hand side

So $cos(x)cos(\frac{\pi }{7}) + sin(x)sin(\frac{\pi }{7})=cos(x - \frac{\pi }{7})$

$cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

we know ,

when $cos(x) =-\frac{\sqrt{2}}{2})$ then

$x = \frac{3\pi }{4} , \frac{5\pi }{4}$

For $cos(x - \frac{\pi }{7}) =-\frac{\sqrt{2}}{2})$

$x - \frac{\pi }{7}= \frac{3\pi }{4} and x - \frac{\pi }{7}= \frac{5\pi }{4}$

Add $\frac{\pi }{7}$ on both sides

$x= \frac{3\pi }{4} + \frac{\pi }{7} and x= \frac{5\pi }{4} +\frac{\pi }{7}$

Finally we add 2npi for general solution

So options C and D are correct

6 0

3 years ago

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score?

Phantasy [73]

Answer:

The student's weighted mean score is 92.2.

Step-by-step explanation:

To find the student's weighted mean scored, we multiply each grade by it's weight.

Grades and weights:

Homework: Grade of 86, weight of 20% = 0.2

Quiz: Grade of 87, weight of 5% = 0.05

Quiz: Grade of 91, weight of 5% = 0.05

Project: Grade of 98, weight of 45% = 0.45

Final Exam: Grade of 88, weight of 25% = 0.25.

What is the student's weighted mean score?

0.2*86 + 0.05*87 + 0.05*91 + 0.45*98 + 0.25*88 = 92.2

The student's weighted mean score is 92.2.

7 0

3 years ago