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3 years ago

Evaluate the expression when y = 3 a.) Y - 1

Mathematics

1 answer:

oksano4ka [1.4K]3 years ago

3 0

Y - 1 =
3 - 1 =
2 ← answer

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As the carbon content in steel increases, its ductility tends to decrease. A researcher at a steel company measures carbon conte

mixer [17]

Answer:

d. -5.666 to -0.926

Step-by-step explanation:

Here a pivotal quantity is $T = \frac{\hat{\beta_{1}}-\beta_{1}}{se(\hat{\beta_{1}})}$ where $\beta_{1}$ is the true slope of the regression equation (unknown), $\hat{\beta_{1}}$ is its least square estimate and $se(\hat{\beta_{1}})=1.097$ is its estimated standard error. And T has t-distribution with n-2=15-2=13 degrees of freedom (n is the sample size). We have that $\hat{\beta_{1}} = -3.30$ , and because we want the 95% confidence interval, we should use the 2.5th quantile of the t distribution with 13 df, this value is -2.16 and the 95% confidence intervale is given by $\hat{\beta_{1}}\pm t_{0.025}se(\hat{\beta_{1}})$ , i.e., $-3.30\pm (2.16)(1.097)$ . Therefore, the 95% confidence interval explicitly is (-5.666, -0.926)

6 0

4 years ago

For triangle ABC with sides a,b and c the law of cosines states

grigory [225]

Answer:

SAS

Step-by-step explanation:

Looking for the third side given the other two sides and the angle between them

c² = a² + b² - 2abcosC

6 0

3 years ago

Guys, please help me with this question I'm having trouble in solving this

navik [9.2K]

C I think okay bye now

6 0

3 years ago

Does a negative exponent let you know how big or small the number is

denis23 [38]

The larger the number is in front of the negative the smaller the number is. Fir example -90 is smaller than -5.

3 0

3 years ago

URGENT! DO NOT TROLL!

nexus9112 [7]

Hello!

The formula for area of a circle is $\pi r^{2}$

$\pi$ is 3.14 (which is 22/7), and r stand for the radius, which is half of the diameter. If the diameter is 28 cm, the radius is 14 cm.

$\pi 14^{2}$
$\pi (196)$
616

Answer:
Approximately 616 cm $^{2}$ .

Hope this helps!

7 0

3 years ago