3 years ago

Solve for the unknown angle

Mathematics

2 answers:

Solnce55 [7]3 years ago

8 0

30°
20+130=150
180-150=30

Helga [31]3 years ago

4 0

Answer:

Step-by-step explanation:

You might be interested in

What is the median of 6, 7, 3, 15, 4, 4.

NeTakaya

Answer:

Step-by-step explanation:

The median is the middle when the numbers are lined up from smallest to largest

3,4,4,6,7,15

There are 6 number so the middle is the between the 3rd and 4th number

3,4,4, 6,7,15

Take the 3rd and 4th numbers and average

(4+6)/2 = 10/2 = 5

5 0

2 years ago

Read 2 more answers

A market research team compiled the following discrete probability distribution, where X represents the number of automobiles ow

rodikova [14]

Answer:

The standard deviation of X is 0.7

Step-by-step explanation:

We are given the following distribution:

x: 0 1 2 3

P(x): 0.3 0.5 0.2 0.4

We have to find the standard deviation of X.

Formula:

$E(x) = \displaystyle\sum x_iP(x_i)\\\\E(x) =0(0.3) + 1(0.5) + 2(0.2) + 3(0.4)\\\\E(x) = 2.1\\\\E(x^2) = \displaystyle\sum x_i^2P(x_i)\\\\E(x^2) =0(0.3) + 1(0.5) + 4(0.2) + 9(0.4)\\\\E(x^2) = 4.9\\\\Var(x) = E(x^2) - (E(x))^2 = 4.9-(2.1)^2 = 0.49\\\\\sigma(x) = \sqrt{Var(x)} =\sqrt{0.49} = 0.7$