2 years ago

Triangle BDC is isosceles

Mathematics

1 answer:

Ganezh [65]2 years ago

6 0

ZCAB angle is congruent to ZBAD

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18 is the greatest common factor of two numbers. What are several things you know about the prime factorization of each number?

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Step-by-step explanation:

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3 years ago

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KonstantinChe [14]

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3 years ago

Evaluate 2y²(x+y) when x = 1 and y = 5<br> Show working out

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300

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3 years ago

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How to calculate standard deviation given mean and sample size?

ad-work [718]

In addition to mean and sample size you will need the individual scores.

The formula for standard deviation is:

S^2 = E(X-M)^2/N-1

Here's an example:
Data set: 4,4,3,1
Mean: 3
Sample size: 4

First, put the individual scores one after the other and subtract the mean from it.
4 - 3 = 1
4 - 3 = 1
3 - 3 = 0
1 - 3 = -2

Second, square the answers you got from step 1.
1^2 = 1
1^2 = 1
0^2 = 0
-2^2 = 4
Third, plug the values from step 2 into the formula.

S^2 = (1+1+0+4)/(4-1) = 6/3 = 2

Standard deviation = 2

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3 years ago

Nathan bought a cd for his friend. The length and width of the cd case is 4 18⁄25 inches. What is the area of the cd case?

ale4655 [162]

Answer:

Hence the area of CD bought by Nathan is <em>22.2784 square inches.</em>

Step-by-step explanation:

The length and width of a CD bought by Nathan is $4\frac{18}{25}=\dfrac{118}{25}$ inches.