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S_A_V [24]
3 years ago
6

Please help

Mathematics
1 answer:
Anastasy [175]3 years ago
8 0

Answer:

False

Step-by-step explanation:

2cos^2(4x) - 1 = cos(8x)

cos(8 *pi/12) = cos(2pi/3) = cos(pi - pi/3) = - cos(pi/3)= 1/2, which is not 0

cos(8x) = 0

==> 8x = 0 or pi

==> x = 0 or pi/8

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Can someone please answer this
Maksim231197 [3]

Answer:

A

Step-by-step explanation:

7 0
4 years ago
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Ed and Suzie went out to eat at Pizzeria. The dinner check was ​$24.00. They left a tip of ​$4.32. What percent of the check was
elena55 [62]

Answer:

18%

Step-by-step explanation:

24-18% is 19.68 which means it took away $4.32.

5 0
3 years ago
A hot air balloon to descends 305 feet per minutes for 4 minutes and then ascends at a rate of 215 feet per minute for another 2
expeople1 [14]
305 × 4 = 1220
215 × 2 = 430
1220 - 430 = 790

The change in the altitude of the balloon is 790 feet.
5 0
4 years ago
9/10 divided by 3/5
Sever21 [200]

Answer:

1 1/2

Step-by-step explanation:

9/10 ÷ 3/5

Copy dot flip

9/10 * 5/3

Rewriting

9/3 * 5/10

3 * 1/2

3/2

1 1/2

7 0
3 years ago
Read 2 more answers
Simplify completely the quantity 5 times x to the third power plus 10 times x to the 2nd power plus 15 times x all over 5 times
dedylja [7]
The <u>correct answer </u>is:

x²+2x+3.

Explanation:

\frac{5x^3+10x^2+15x}{5x}

We need to divide each term of the numerator by the denominator.  For the <u>first term</u>:
\frac{5x^3}{5x}

Dividing the coefficients, we have 5/5 = 1.  
When dividing the variables, we use the quotient rule:  when dividing powers that have the same base, subtract the exponents.  This gives us:
x³/x = x³/x¹ = x³⁻¹ = x²

For the first monomial, this gives us 1x² = x².

The <u>second term</u>:
\frac{10x^2}{5x}

Dividing the coefficients, we have 10/5 = 2.
Dividing the variables, we again use the product rule:
x²/x = x²/x¹ = x²⁻¹ = x¹ = x

Together this gives us 2x.

The <u>third term</u>:
\frac{15x}{5x}

Dividing the coefficients, we have
15/5 = 3.
Dividing the variables, we have x/x; when you divide something by itself, the answer is 1.  This gives us:
3*1 = 3.

Together our quotient is x²+2x+3.
7 0
3 years ago
Read 2 more answers
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