All categories

3 years ago

How is the answer 16? Please explain

Mathematics

1 answer:

Viktor [21]3 years ago

7 0

Triangle STU is similar to triangle SVW
so

TU ST
------- = ---------- (as you know SV = ST + TV = 12 + 18 = 30)
VW SV
so
TU 12
------- = ----------
40 30

TU = 12 * 40 / 30
TU = 16

answer
16 inches

You might be interested in

Is the answer right?

son4ous [18]

Almost. Where you put -(-5) and then later on you say it’s -5. It’s not. It would be +5 or just 5 because - and - makes a plus :)

7 0

2 years ago

Find the area plz and hurry

Gennadij [26K]

10-47
11-42.16
12-48.65
13-2.4
14-7.9
15-8.15
Hope it helps :)

6 0

2 years ago

Find the slope of the line that passes through the points (–1, 6) and (2, 15)

11111nata11111 [884]

Answer:

m=3

Step-by-step explanation:

$\frac{15-6}{2-(-1)} =\frac{9}{3} =3$

7 0

3 years ago

The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident th

Aleks04 [339]

Answer:

The minimum sample size that can be taken is of 14 dogs.

Step-by-step explanation:

The formula for calculating the minimum sample size to estimate a population mean is given by:

$n=\frac{z^{2}\sigma^{2}}{e^{2}}$

The <u>first step</u> is obtaining the values we're going to use to replace in the formula.

Since we want to be 95% confident, $1-\alpha=0.95 \Rightarrow \alpha=0.05$ .

Therefore we look for the critical value $z_{\alpha/2}=1.96$ .

Then we calculate the variance:

$\sigma = 3.7 \Rightarrow \sigma^{2}=13.69$

And we have that:

$e=2 \Rightarrow e^{2}=4$

<u>Now</u> we replace in the formula with the values we've just obtained:

$n=\frac{1.96^{2}*13.69}{4}=13.1479\approx 14$

Therefore the minimum sample size that can be taken to guarantee that the sample mean is within 2 inches of the population mean is of 14 dogs.

6 0

2 years ago

What time what gives you 33

Soloha48 [4]

11 times 3 would be one way and 1 times 33 would be the last way to get 33 as an answer ;)

3 0

3 years ago