All categories

3 years ago

What’s the domain of x^2+3

Mathematics

1 answer:

salantis [7]3 years ago

4 0

im not sure if you want the solution or interval notation. i'll put both

solution: -oo < x < oo

interval notation: (-oo, oo)

You might be interested in

HELP PLS.....consider the equations y=√x and y=x^2-1. The system of equations is equal at approximately......

Luden [163]

The answer to this question is A) (1.5, 1.2). We can deduce this since the graph of y = √x only exists in quadrant I on the coordinate plane.

4 0

3 years ago

Read 2 more answers

Solve the equations: 18=n-18 p-18=3 x-9=1

Klio2033 [76]

Step-by-step explanation:

(1 point)

No, there isn't a more efficient way to solve this system.

Yes, a more efficient way is to multiply the first equation by 4, add to eliminate y, then solve for x.

Yes, a more efficient way is to multiply the first equation by −4, add to eliminate y, then solve for x.

Yes, a more efficient way is to multiply the first equation by −4, add to eliminate x, then solve for y.

6 0

3 years ago

Eveuinup: 08% Use simple interest to find the ending balance. 17) $26,000 at 3% for 2 years

son4ous [18]

Answer: $27,560

Step-by-step explanation:

Formular for simple interest = PRT

P= 26,000

R=3% = 3/100 = 0.03

T= 2

26,000 x 0.03× 2

= 1,560

Ending balance will be 26,000 + 1,560

= $27,560

5 0

3 years ago

PLEASE ANSWER ASAP! NO EXPLANATION NEEDED!

adell [148]

Answer:

3/5

Step-by-step explanation:

you said I didn't need an explanation

5 0

3 years ago

Read 2 more answers

A company with a fleet of 150 cars found that the emissions systems of only 4 out of the 25 they tested failed to meet pollution

salantis [7]

Answer:

No, there is no strong evidence that the percentage of the fleet out of compliance is different from their initial thought.

Step-by-step explanation:

We are given that a company with a fleet of 150 cars found that the emissions systems of only 4 out of the 25 they tested failed to meet pollution control guidelines.

The company initially believed that 30% of the fleet was out of compliance.

Let p = percentage of the fleet that was out of compliance.

SO, Null Hypothesis, $H_0$ : p = 30% {means that the percentage of the fleet out of compliance is same as their initial thought}

Alternate Hypothesis, $H_A$ : p $\neq$ 30% {means that the percentage of the fleet out of compliance is different from their initial thought}

The test statistics that will be used here is One-sample z proportion statistics;

T.S. = $\frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }$ ~ N(0,1)

where, $\hat p$ = percentage of the fleet out of compliance = $\frac{4}{25}$ = 16%

n = sample of systems tested = 25

So, test statistics = $\frac{0.16-0.30}{{\sqrt{\frac{0.16(1-0.16)}{25} } } } }$

= -1.909

The value of the test statistics is -1.909.

Since in the question we are not given with the level of significance at which hypothesis can be tested, so we assume it to be 5%. Now at 5% significance level, the z table gives critical values between -1.96 and 1.96 for two-tailed test.

Since our test statistics lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which we fail to reject our null hypothesis.

Therefore, we conclude that the percentage of the fleet out of compliance is same as their initial thought.

3 0

3 years ago