All categories

2 years ago

(a) How many tens are in 457? How many whole tens?

Mathematics

1 answer:

PolarNik [594]2 years ago

5 0

Answer:

45,7 tens
45 whole tens

Step-by-step explanation:

457 / 10 = 45,7

You might be interested in

What is the slope of the line that passes through the points E(-1, 4) and F(2, 6)?

Phoenix [80]

The formula for finding the slope is:
(second y - first y)/(second x - first x)
so for this question you can say:
(6 - 4) / (2 - (-1)) = (2)/ (2+1) = 2/3 so the slope is 2/3 :)))
i hope this is helpful
have a nice day

8 0

3 years ago

a sociologist develops a test to measure attitudes towards public transportation and 27 randomly selected subjects are given the

horsena [70]

Answer:

The 95% confidence interval for the mean score is:

$\mu$ ∈ $(67.73,\ \ 84.67)$

Step-by-step explanation:

We want to estimate the population mean, that is, the average score of all the subjects.

An estimator for the population mean μ is ${\overline {x}}$

Since the sample size is $27$ then we use the statistic $t_{\frac{\alpha}{2}}$ with $27-1 = 26$ degrees of freedom

The confidence interval for the mean is:

$({\displaystyle {\overline {x}}} + t_{\frac{\alpha}{2}}\frac{S}{\sqrt{n}},\ \ {\displaystyle {\overline {x}}} - t_{\frac{\alpha}{2}}\frac{S}{\sqrt{n}})$

Where

${\displaystyle {\overline {x}}}=76.2$ is the average score of the sample

$S=21.4$ is the standard deviation of the sample

$n= 27$ is the sample size

$t_{\frac{\alpha}{2}} = 2.056$ for a confidence level of 95% and 26 degrees of freedom

Then confidence interval is

$(76.2 + 2.056\frac{21.4}{\sqrt{27}},\ \ {76.2 - 2.056\frac{21.4}{\sqrt{27}})$

$(76.2 + 8.467,\ \ 76.2 - 8.467)$

$\mu$ ∈ $(67.73,\ \ 84.67)$

7 0

3 years ago

Select the correct answer. Which equation represents a line that is perpendicular to line FG?

emmasim [6.3K]

Answer:

Hey there!

Equation of Line FG: $y=\frac{1}{2} x+3.5$ , because the slope (rise over run) is 2 and we see that the y intercept is 3.5.

Equation to a Line Perpendicular to FG: $y=-2x-3\\$ , because the equations of perpendicular lines have the same (but could also be different y-intercepts), and opposite reciprocal slopes.