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castortr0y [4]
2 years ago
11

A teacher asks students to list the math lessons they learned on nine random school days in the past month. She evaluates the st

udents’ performance on this assignment to get a general picture of how well students are taking notes. This teacher’s method is an example of.
Mathematics
1 answer:
zysi [14]2 years ago
5 0

Answer:

Simple random sampling

Step-by-step explanation:

Hope this work :)

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Which phrase provides the best definition of sedimentary rocks?
Alexxandr [17]
Option 3 is the best choice
5 0
3 years ago
Read 2 more answers
Simplify the expression by combining like terms -3x - 8 + 7x - 1
natulia [17]

Answer:

4x-9.

Step-by-step explanation:

-3x - 8 + 7x - 1

7x -3x=4x.

-8 -1= - 9.

4x-9

8 0
3 years ago
Suppose m is in the line given by the equation 6x-3y=7, and suppose n is the line perpendicular to m and passing Nd through the
stealth61 [152]

Answer:

The x co-ordinate o intersection of line k and n is \frac{8}{11}

Step-by-step explanation:

Given as :

The equation of line m is 6 x - 3 y = 7

So, in the standard form , line equation is

y = a x + c  , where a is the slope

So,  6 x - 3 y = 7 can be written as

3 y = 6 x - 7

or,  y = 2 x - \frac{7}{3}       ........1

So, slope of this line = a = 2

Now, The line n is perpendicular to line m and passing through line ( 6 , 2 )

So, Slope of line n = b

For , perpendicular lines , products of slope = - 1

Or, a × b = -1

∴  b = - \frac{1}{a}

I.e b = - \frac{1}{2}

So,equation of line n with slope b and passing through line ( 6 , 2 ) is

y - y_1 = b ( x - x_1 )

or, y - 2 =  - \frac{1}{2} ( x - 6 )

or, 2 × ( y - 2 ) =  - 1 ( x - 6 )

or, 2 y - 4 = - x + 6

or, x + 2 y -10 = 0          ........2

Again, equation of line k with slope 5 and y intercept = 1

For y intercept , x coordinate = 0

y = c x + c

or, 1 = c× ( 0 ) + c

Or, c = 1

Or, equation of line k is

y = 5 x + 1           ..........3

Now intersection of line k and n is

put the value of y from eq 3 into eq 2

I.e x + 2 × (  5 x + 1  )-10 = 0  

Or, x + 10 x + 2 - 10 = 0

or, 11 x - 8 = 0

or 11 x = 8

∴  x = \frac{8}{11}

Hence The x co-ordinate o intersection of line k and n is \frac{8}{11}  Answer

4 0
3 years ago
Name the property illustrated 48+13+5=13+48+5
Veronika [31]

Answer:

Commutative property of addition, or just commutative property.

Step-by-step explanation:

The commutative property states that the order of numbers in addition does not matter, which is shown in the problem.

5 0
3 years ago
In a school, the probability that a student takes environmental science and geography is 0.72.The probability that a student tak
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I believe it would be 0.75

If not that the only other thing I could think of would be 0.03, but it says he is already taking environmental science.
6 0
3 years ago
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