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3 years ago

Please its past due, will give brainlist, pt. 2

Mathematics

2 answers:

Tasya [4]3 years ago

8 0

7 when you simply you is 7

Vika [28.1K]3 years ago

6 0

For the temperature one, it is y=7x+42 since it was already 42 degrees and is raising 7 degrees each time. The point-slope one is y-5=7(x+8) since point slope is y-y1=M(x-x1) it gives you the coordinate point and the slope so you just fill it in. For the graph all you need to do is go to -1 on the x axis and draw a line going up and down because that would keep it at -1 but still be a line.

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Please show work, will mark brainliest

Ad libitum [116K]

Answer:

The radius of the can, rounded to the nearest hundredth, is 530.66.

Step-by-step explanation:

We want to do the reverse of the formula for V, which is pi(r)^2(h).

to isolate r.

Let's start by writing an equivalent equation to V = $\pi$ $r^{2}$ h by solving for r

$\sqrt[]{\frac{V * \pi }{h} } = r$

Now, substitute and solve for r

1014 * 3.14 / 6 = 530.66

5 0

3 years ago

What is 68.52 rounded to the nearest whole number?

4vir4ik [10]

Answer:

it would be 69 because you would round .5 to 1 then 1 plus the 68 from the 68.52 making it 69

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is kno

fomenos

Answer: a. 19.200 to 20.800

Step-by-step explanation:

Formula to find the confidence interval $(\mu)$ :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

, where n is the sample size

$\sigma$ = Population standard deviation.

$\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Two tailed z-value for significance level of $\alpha$ .

Given : Confidence level = 95.44% = 0.9544

Significance level = $\alpha=1-0.9544=0.0456$

Using standard normal z-value table ,

Two tailed z-value for Significance level of 0.0456 :

$z_{\alpha/2}=z_{0.0228}=1.999\approx2$

Also,

n=144

$\sigma= 4.8$

$\overline{x}=20$

Then, the required 95.44% confidence interval for the population mean :-

$20\pm (2)\dfrac{4.8}{\sqrt{144}}\\\\ =20\pm (0.800)\\\\=(20-0.800,\ 20+0.800)=(19.200,\ 20.800)$

Hence, the 95.44% confidence interval for the population mean is 19.200 to 20.800.

8 0

3 years ago

What is the y- intercept of the graph of 2x + y = -4?

Brrunno [24]

First write the equation in slope-intercept form which is more commonly known as y = mx + b form where the m or the coefficient of the x term represents the slope of the b or the constant term represents the y-intercept.

Subtract 2x from both sides to get y = -2x - 4.

I put the x term first because that's how it is in y = mx + b form.

Now we can see that the b or the constant term is -4.

We can write this as the ordered pair (0, -4).

Keep in mind when writing a y-intercept as an ordered pair, your x-coordinate will always be 0 in the ordered pair.

8 0

3 years ago

A square has side length 10 yd. What is the length of a diagonal of the square?

Vsevolod [243]

Answer:

10√2

Step-by-step explanation:

Lets cut the square into a triangle, making a line from one corner to another, then let's see what we have.

We shoupd have a triangle where we don't know the hypotenuse, which we can find using the formula: a^2 + b^2 = c^2

so:

10^2 + 10^2 = c^2

100 + 100 = c^2

c^2 = 200

now let's square root what we got

√200

there are 2 10's in 200, which will turn the equation to:

10√2

this can't be simplified further, so our answer is 10√2

3 0

3 years ago