All categories

3 years ago

Suppose that y varies directly with x. Given x=2.5 when y=100. Find y when x = 3

Mathematics

1 answer:

sergeinik [125]3 years ago

3 0

Answer

y=120

Step-by-step explanation:

2.5 ->100

3 -> y

y=(3*100)/2.5

y=120

You might be interested in

A 90% confidence interval for the mean height of students

Westkost [7]

Answer:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean $\mu$ is given by this formula:

$\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}$

The confidence level on this case is 0.9 and the significance $\alpha=1-0.9=0.1$

The confidence interval calculated on this case is $60.128 \leq \mu \leq 69.397$

The margin of error for this confidence interval is given by:

$ME =t_{\alpha/2} \frac{s}{\sqrt{n}}$

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

$ME = \frac{Upper -Lower}{2}$

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

4 0

3 years ago

A recipe for a fruit drink calls for 2 cups of fruit juice for every 5 cups of water. Look at each drink mix. Does each drink mi

stealth61 [152]

1. Yes
2. No
3. Yes
4.no

4 0

3 years ago

Read 2 more answers

If 1 16 oz can cost. $1 how much is 8 40oz cans

Studentka2010 [4]

Answer:

8 I think

Step-by-step explanation:

I did 40÷16=2.5 then 2.5×8=20

3 0

3 years ago

A skier skis CCW along a circular ski trail that has a radius of 1.9 km. She starts at the northern most point of the trail and

mestny [16]

The expressions of the number of radians can be expressed in the ways below.

<h3>How to write the expressions</h3>

The radius = 1.9 km

The angular speed = 3.1 radians per hour

a. The expression of t from the number of radians

θ = π/2 + 3.1t

<h3>b. Expression from the East</h3>

x = rcosθ

= 1.9cos(π/2 + 3.1t)km

<h3>c. Expression from the north of the center</h3>

= rsinθ

= 1.9sin((π/2 + 3.1t)km