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2 years ago

Multiply (2x + 8)^2.

Mathematics

1 answer:

pantera1 [17]2 years ago

7 0

If the ^ is a divided sign then 5x if it’s a multiplication sign 20x! Don’t forget Order of operations.

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Use elimination to solve 3x-2y=24 x+2y=48

MakcuM [25]

Answer:

X= 18; Y=15

Step-by-step explanation:

As a student myself working this out I cannot explain how I got the answer but I know it is correct.

5 0

3 years ago

The graph of a linear

Gwar [14]

Answer:

Where is the graph?

Step-by-step explanation:

8 0

2 years ago

In a sample of 679 new websites registered on the Internet, 42 were anonymous (i.e., they shielded their name and contact inform

Semmy [17]

Answer:

95% Confidence interval: (0.0429,0.0791)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 679

Number of anonymous websites, x = 42

$\hat{p} = \dfrac{x}{n} = \dfrac{42}{679} = 0.0618$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.96$

Putting the values, we get:

$0.0618\pm 1.96(\sqrt{\dfrac{0.0618(1-0.0618)}{679}}) = 0.0618\pm 0.0181\\\\=(0.0429,0.0791)$

is the required confidence interval for proportion of all new websites that were anonymous.

8 0

2 years ago

Rewrite the quadratic function in vertex form.<br> Y=5x^2-10x+2

Natalka [10]

Answer:

y = 5x2 + 10x - 15

We want this in format y = a(x-h)2 + k

where the vertex will be at (h,k)

y = 5(x2+2x) - 15

Complete the square on x2+2x

y = 5(x2+2x+1) - 15 - 5

We subtract 5 at the end because we are actually adding 5(1) = 5

so we need to remove it also to keep the total equal

y = 5(x+1)2 - 20

The vertex is at (-1,-20)

3 0

3 years ago

Name and locate points in all four quadrants of the coordinate plane.

IceJOKER [234]

Shiiii who’s that fine man

7 0

2 years ago