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3 years ago

Determine if the ordered pair is a solution of the equation. Is the point (2,1) is a solution of the equation: y = 2x - 3?

Mathematics

1 answer:

vladimir2022 [97]3 years ago

7 0

I think it is false but I am not for sure

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Find the ratios of the corresponding sides 10/2 and 6/3

ololo11 [35]

Answer:

Step-by-step explanation:

10:2 = 5:1

6:3 = 2:1

4 0

3 years ago

What is the value of b? 2x2-6x-20=0

spin [16.1K]

Answer:

b = -6

Step-by-step explanation:

We use the general equation a*x^2 + bx + c = 0, the Quadratic Equation.

Compare it to 2x^2 - 6x - 20 = 0

b = -6 here

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4 years ago

If f (x) = -4x + 4 and g(x) = 2x + 2x, what is f (g(4))?<br> f(g(4)) =

soldi70 [24.7K]

Answer:

-60

Step-by-step explanation:

first you have to input 4 to the equation g(x).

2(4) + 2(4) = 16

now input it to f(x)

-4(16) + 4 = -60

i feel like this is correct

3 0

2 years ago

An insurance company estimates 45 percent of its claims have errors. The insurance company wants to estimate with 99 percent con

nydimaria [60]

Answer:

We need a sample size of at least 657.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is given by:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

45 percent of its claims have errors.

So $\pi = 0.45$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

What sample size is needed if they wish to be within 5 percent of the actual

This is a sample size of at least n, in which n is found when M = 0.05.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.05 = 2.575\sqrt{\frac{0.45*0.55}{n}}$

$0.05\sqrt{n} = 1.28$

$\sqrt{n} = \frac{1.28}{0.05}$

$\sqrt{n} = 25.62$

$\sqrt{n}^{2} = (25.62)^{2}$

$n = 656.4$

We need a sample size of at least 657.

6 0

3 years ago

Which of the triangles described in the table is a right triangle?.

Sergeu [11.5K]

A right triangle is a triangle that consist of an angle which one angle is 90degree and the remaining angle would be less than to 90 and the best answer to your question based on my calculation i think the answer is A.

5 0

3 years ago