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3 years ago

Hello, who can help me solve this problem?Please see the picture below and take a look

Mathematics

1 answer:

Alex777 [14]3 years ago

7 0

9514 1404 393

Answer:

Step-by-step explanation:

It's about making up a rule that gets from one figure to the next. Here's the rule I used:

The bottom left segment is rotated 1/8 turn CW from one figure to the next.

The top middle segment is rotated 1/4 turn CW from one figure to the next.

After steps, the top middle segment will be back in the same place. The lower left segment will be in the opposite corner. This corresponds to figure C.

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Determine the point estimate of the population proportion and the margin of error for the following confidence interval.Lower bo

Kamila [148]

Answer: The point estimate of the population proportion is . 485.

The margin of error is 0.273.

Step-by-step explanation:

Confidence interval for population proportion(p):

sample proportion ± Margin of error

Given: Lower bound of confidence interval = 0.212

Upper bound = 0.758

⇒sample proportion - Margin of error=0.212 (i)

sample proportion + Margin of error= 0.758 (ii)

Adding (i) and (ii) , we get

2(sample proportion) =0.970

⇒ sample proportion = 0.970÷2= 0.485

Since sample proportion is the point estimate of the population proportion.

So, the point estimate of the population proportion= 0.485

Now put sample proportion =0.485 in (ii), we get

0.485+ Margin of error= 0.758

⇒ Margin of error= 0.758 - 0.485 =0.273

i.e. The margin of error is 0.273.

5 0

3 years ago

(2\sqrt(5)+3\sqrt(7))^(2)

Natali5045456 [20]

(73+12sqrt(35))/35. You can expand it and then simplify

5 0

4 years ago

For the function y = -2x2 + 4x + 1, what are the coordinates of the vertex?

umka21 [38]

Answer:

(1,3)

Step-by-step explanation:

The given function is

$y = - 2 {x}^{2} + 4x + 1$

Factor 2 from the first two terms

$y = - 2( {x}^{2} - 2x) + 1$

Add and subtract the square of half the coefficient of x.

$y = - 2( {x}^{2} - 2x + 1 - 1) + 1$

Let us create perfect square trinomial

$y = - 2( {x}^{2} - 2x + 1 ) + - 2 \times - 1 + 1$

This implies that:

$y = - 2( {x - 1)}^{2}+ 3$

Therefore the vertex is (1,3).

We got this by comparing to

$y = a( {x - h)}^{2} + k$

8 0

4 years ago

Yesterday , between noon and midnight the temperature dropped 29.6. If the temperature was -5.4 at midnight what was it at noon

In-s [12.5K]

Answer:

24.2

Step-by-step explanation:

-5.4 + 29.6 is 24.2

3 0

3 years ago

Read 2 more answers

In the diagram below, ∆PRQ ∼ ∆DEF. Find each of the following. m∠P DE FE m∠D m∠R the scale factor of ∆PRQ ∼ ∆DEF

Aloiza [94]

Answer:

see below

Step-by-step explanation:

Corresponding angles of similar triangles are equal and corresponding sides are proportional so:

m ∠P = m ∠D = 180° - (35° + 89°) = 56°

m ∠Q = m ∠F = 89°

m ∠ R = m ∠E = 35°

PR/DE =PQ/DF

40/DE = 20/24 cross multiply and solve for DE

DE = 40*24/20

DE = 48

scale factor is DF/PQ = 24/20 = 6/5 so FE = 6/5 *RQ =6/5 *36 = 43.2

8 0

3 years ago