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3241004551 [841]
3 years ago
10

Mrs. Brown gives two tests to her class. 30% of the class passed both tests and 45% of the class passed the first test. What

Mathematics
1 answer:
Ad libitum [116K]3 years ago
7 0

Answer:

C) 67%

Step-by-step explanation:

Conditional probability:

P(A given B) = P(A and B) / P(B)

P(passed 2nd given passed 1st) = P(passed 2nd and 1st) / P(passed 1st)

P(passed 2nd given passed 1st) = 0.30 / 0.45

P(passed 2nd given passed 1st) = 0.67

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When one element replaces another element in a compound the reaction is a___ reaction
vampirchik [111]

Answer:

single replacement lol

Step-by-step explanation:

7 0
3 years ago
Find the unit rate 30 in per 5 years the unit rate is inches per year​
Ilya [14]

Answer:

6 inches per year/ 6;1

Step-by-step explanation:

30;5 can be simplified into a unit rate by dividing by 5. 30/5=6 and 5/5=1. So its 6 inches per one year

6 0
3 years ago
Assumptions of a regression model can be evaluated by plotting and analyzing the ____________
Gala2k [10]

The assumptions of a regression model can be evaluated by plotting and analyzing the error terms.

Important assumptions in regression model analysis are

  1. There should be a linear and additive relationship between dependent (response) variable and independent (predictor) variable(s).
  2. There should be no correlation between the residual (error) terms. Absence of this phenomenon is known as auto correlation.
  3. The independent variables should not be correlated. Absence of this phenomenon is known as multi col-linearity.
  4. The error terms must have constant variance. This phenomenon is known as homoskedasticity. The presence of non-constant variance is referred to heteroskedasticity.
  5. The error terms must be normally distributed.

Hence we can conclude that the assumptions of a regression model can be evaluated by plotting and analyzing the error terms.

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4 0
2 years ago
The length of each side is quadrupled. How many times larger is the new area when compared to the original?
GaryK [48]

16 times larger is the new area when compared to the original.

Given that, the length of each side of the square is quadrupled.

We need to find how many times larger is the new area when compared to the original.

<h3>What is the area of a square?</h3>

A square is a closed two-dimensional shape with four equal sides and four equal angles. The four sides of the square form the four angles at the vertices. The sum of the total length of the sides of a square is its perimeter, and the total space occupied by the shape is the area of the square. The formula to calculate the area of a square is a².

Let the length of each side of the square be x.

Then the length of each side of the new square will be 4x.

Now, the area of the original square = x²

The area of the new square = (4x)² = 16x²

So, the new square = 16 × the original square

Therefore, 16 times larger is the new area when compared to the original.

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5 0
1 year ago
Last week kellie ran 28 miles. This week she ran 32 miles. What is the perecent of change in the number she ran?
Oksana_A [137]

Answer:

60%

Step-by-step explanation:

first do 28+32.

Next it equals 60. So change 60 to percentage form. It would be 60%

7 0
3 years ago
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