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dangina [55]
3 years ago
11

Identify the amplitude and the period of the function c(x) = 3cos (x + π).

Mathematics
1 answer:
stepladder [879]3 years ago
8 0
Amplitude = 3 in the above function
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7. Which pair shows equivalent expressions? A. 3(x+2) = 3x + 6 B. 3x + 2x = x²(x + 2) C. 3x + 2 = 3(x + 2) D. -3(2 + x) = -6x -
Sergio039 [100]
C has equivalent expressions I think
8 0
2 years ago
How do I get the answer y= 2x^2+9x-5
guapka [62]

Answer:

Quadratic Formula

so

x = -5

and

x = 0.5

Step-by-step explanation:

Whenever you see a problem in this form, which you will see a lot of, you can try to factor it or use the "least squares" method or what have you, but those won't always work, unfortunately.

Fortunately, the quadratic formula will never fail you with quadratic expressions.

This is the Quadratic Formula

x = \frac{-b \frac{+}{-} \sqrt{b^2-4ac}  }{2a}

a is the the number on the variable with the exponent ^2

b is the number on the variable with no exponent

c is the third number

a and b cannot be equal to 0; c can be

Since we're looking for a number with an equation that has a square root in it, we're going to get two answers. These two answers come from the radical being separately added AND subtracted from the radical. It's basically two problems.

Plugging  in our numbers to this equation gives us x values of -5 and 0.5. This will always work with polynomials with factors of ^2 in them.

If you have a TI-84 calculator or newer, there's a tool on it that will factor polynomials like this one for you just by giving it the numbers.

7 0
3 years ago
5 times 3 2/5 I need help pls k have school soon
timama [110]
5 times 3 is 15! i’m confused at the rest of the question!
8 0
2 years ago
Read 2 more answers
Natalie's aunt gave her $47 to spend on clothes at the mall. She bought 4 shirts that cost $4 each and a pair of pants that cost
Murljashka [212]

Answer:$18

Step-by-step explanation:4 * 4 = $16. One pair of pants = $13. 16 + 13 = $29. 47 - 29 = $18

5 0
3 years ago
Janet’s savings account has $12.10 more than the $242 it had at the beginning of the year. What percent more was in the savings
Ilia_Sergeevich [38]
5% is the answer!! :)
5 0
3 years ago
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