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joja [24]
3 years ago
12

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?
A. systematic random sampling
B. Simple random sampling
C. Convenience sampling
D. Stratified sampling
Mathematics
1 answer:
N76 [4]3 years ago
8 0
<span>Hope this helps: C. Convenience sampling</span>
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Miranda enlarged a picture twice as shown below, each time using a scale factor of 3.
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Answer:

a,c,d

Step-by-step explanation:

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If u(x) = x^5 - x^4 + x^2 and v(x) = -x^2, which expression is equivalent to (u/v)(x)
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The appropriate choice is ...
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Sarah has some chocolates.
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Find the focus of the parabola whose equation is y=1/8 x^2
Mama L [17]

Answer:

The focus is: (0,2)

Step-by-step explanation:

Given

y = \frac{1}{8}x^2

Required

Determine the focus

The focus of a parabola

(x- h)^2 = 4p(y - k)

is:

(h,k+p)

So, we have:

y = \frac{1}{8}x^2

Cross multiply

8y = x^2

Rewrite as:

x^2 = 8y

Rewrite as:

(x - 0)^2 = 8(y - 0)

Express 8 as 4 * 2

(x - 0)^2 = 4 * 2(y - 0)

By comparison with: (x- h)^2 = 4p(y - k)

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So, the focus (h,k+p) is:

(h,k+p) = (0,0+2)

(h,k+p) = (0,2)

7 0
3 years ago
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