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Stells [14]
3 years ago
6

Piano lessons cost $15. What expressions could be used to find the cost in dollars of 5 lessons

Mathematics
1 answer:
kirill115 [55]3 years ago
5 0
Just write 15x5. Hope I helped
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Please, I need help I'm way behind.
gregori [183]

Answer:

\frac{18√2}{√3}

Step-by-step explanation:

  1. The lengths of the sides of a 30-60-90 triangle are in the ratio 1:2:√3.
  2. The lengths of the sides of a 45-45-90 triangle are in the ratio 1 : 1 : √2
  3. We can get the length of the longest side of the bottom triangle is 9×2÷√3 = \frac{18}{√3}
  4. And based on the theory shown on the 2nd step, we can get x (the length of the longest side of the upper triangle) is \frac{18}{√3}x√2  
3 0
3 years ago
The distance is approximately
Norma-Jean [14]

Distance = the square root of ((x2- x1) ^ 2 + (y2 - y1) ^ 2)

−You can use this to find your answer

−:)))

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5 0
3 years ago
The sum of four consecutive integers if the first integers is x
vlada-n [284]
X + (x + 1) + (x + 2) + (x + 3)
4x + 6
3 0
3 years ago
Please help (50) points
Artemon [7]
The answer is b. y = -5x +11
8 0
3 years ago
Read 2 more answers
When you construct a confidence interval for the difference between two proportions, what do you use as an unbiased estimate of
Liono4ka [1.6K]

Answer:

Thus difference in sample proportions would be the unbiased estimate of the difference between the two proportions

Step-by-step explanation:

Given that you construct a confidence interval for the difference between two proportions

Let the proportions be p1 and p2

Sample sizes be n1 and n2

For samples of larger size randomly drawn we know that

p1 follows Normal with mean = sample proportion = p1 and

p2 is N with mean = sample proportion p2

Assuming these two proportions are independent we have

p1-p2 will follow a normal distribution with mean = p1-p2

Thus difference in sample proportions would be the unbiased estimate of the difference between the two proportions

3 0
3 years ago
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