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kenny6666 [7]
3 years ago
7

Using trig to solve for missing angle

Mathematics
1 answer:
Serjik [45]3 years ago
4 0
Cos(30)=x/15
15cos(30)=x

Cos= adjacent/ hypotenuse
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5x(3x+2)-4(2x-1)<br><br><br><br> Yea i needd help
UkoKoshka [18]

Answer: 15x² + 2x + 4

x = -2/3, 0, 1/2

Step-by-step explanation:

5x(3x + 2) - 4(2x - 1)

First, distribute:

15x² + 10x - 8x + 4

Combine like terms:

15x² + 2x + 4

This is your polynomial!

If you needed to solve for x, take your original factored polynomial and set each term equal to 0:

5x(3x + 2) - 4(2x - 1)

5x = 0

x = 0

3x + 2 = 0

3x = -2

x = -2/3

-4 = 0

No solution

2x - 1 = 0

2x = 1

x = 1/2

x = -2/3, 0, 1/2

Hope this helps!

4 0
3 years ago
A toy store’s percentage of markup is 25%. A modeltrain costs the store $120. Find themarkup.
Alex Ar [27]
The correct answer is letter B
5 0
3 years ago
A large box of cereal is $6.00 for 20 ounces. A small box of cereal is $4.20 for 15 ounces. Which box of cereal is the better de
maks197457 [2]
A small box because you can buy 2 or more boxes for a less price

i hope this helped and if it didn’t.. sorry
3 0
3 years ago
Read 2 more answers
A sport statistician gathered data on the number of points scored in each game by high school basketball players across the coun
Sonbull [250]

For a sample size of 20 players, 68% of the sample means fall within 19.32 and 20.98

<h3>What is a sample size?</h3>

The sample size is a term used in market research for defining the number of subjects included in a sample size. By sample size, we understand a group of subjects that are selected from the general population and is considered a representative of the real population for that specific study.

Empirical rule states that for a normal distribution, 68% of the values are within one standard deviation from the mean, 95% of the values are within two standard deviation from the mean and 99.7% of the values are within three standard deviation from the mean.

For a population mean of 20.15 and a standard deviation of 3.7

68% are within μ ± σ/√n,

hence,

68% = 20.15 ± 3.7/√20 = (19.32, 20.98)

For a sample size of 20 players, 68% of the sample means fall within 19.32 and 20.98.

To learn more about  sample size from the given link:

brainly.com/question/22927560

#SPJ4

6 0
1 year ago
Which object has a greater surface area: a cube with edges
Mashcka [7]

Answer:

cylinder

Step-by-step explanation:

SA(cube) = 6 cm³

SA(cyl) = 36.11 cm³

8 0
2 years ago
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