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BaLLatris [955]
3 years ago
13

Cos(2x)cos(x)+sin(2x)sin(x)=1

Mathematics
1 answer:
Finger [1]3 years ago
5 0

Answer:

=cos(x) use basic properties of sosine (addition and subtraction) cos(a-b)=cos(a)cos(b)+sin(a)sin(b)

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75% of 7th graders are returning to school. If there are 300 7th graders returning to school, how many total 7th graders are the
bagirrra123 [75]

Answer:

there are 350 in all of the 7th grade

4 0
3 years ago
Danielle makes the claim that when the polynomial x^2-3x-10 is divided by x-5, the remainder is 0. Use what you have learned abo
Mumz [18]

Answer:

<h3>Daniel is correct</h3>

Step-by-step explanation:

Given the polynomial P(x) = x^2-3x-10

To check that the remainder is zero if divided by x - 5, we will first have to equate x - 5 to zero and get x;

x - 5 = 0

x = 5

Then find P(5)

P(5) = 5^2 - 3(5) - 10

P(5) = 25 - 15 - 10

P(5) = 25-25

P(5) = 0

<em>This shows that x - 5 is a factor of the polynomial since P(5) gave us zero according to the factor theorem</em>

7 0
3 years ago
Which of the following is in the solution set of y&lt; 8 x− 3? Select one: (7, 46) (7, 60) (10, 89) (9, 82)
navik [9.2K]

Answer:

  (7, 46)

Step-by-step explanation:

The offered answer choices have x-values of 7, 9, 10. The corresponding upper limit of y-value is ...

  x=7 : y < 8·7 -3 = 53 . . . . . 46 is in the solution set, 60 is not

  x=9 : y < 8·9 -3 = 69 . . . . 82 is not in the solution set

  x=10 : y < 8·10 -3 = 77 . . . . 89 is not in the solution set

Of the choices offered, only (7, 46) is in the solution set.

3 0
3 years ago
Simplify.<br><br> 4 x (8 + 5) + 9 can someone help me out plz
Xelga [282]

Step-by-step explanation:

4x(8+5)+9

=52x+9

=52x+9

Description:

The first step is to simplify the equation provided. So in this case the equation is 4 x (8 + 5) + 9.  After that you will get your answer as =52x+9. So in this case 4 x (8 + 5) + 9 = =52x+9.

Answer: =61

Hope this helps.

8 0
2 years ago
Read 2 more answers
Finding the discriminant
mario62 [17]
I believe the answer you are looking for is 16
7 0
3 years ago
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