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3 years ago

In triangle DEF, FE= 12 and angle D =62. find DE to the nearest tenth

Mathematics

1 answer:

Nastasia [14]3 years ago

6 0

Step-by-step explanation:

Below is an attachment containing the solution.

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Suppose your heart is beating 72 times per minute. At this rate, how many times will it beat in 15 minutes?

Vlad1618 [11]

Hey there!

All you need to do is multiply the beats per minute by 15 minutes.
72 x 15=1080. Your heart will beat 1080 times in 15 minutes.

I hope this helps!

8 0

4 years ago

1000 more than the smallest 4 digit number is

melamori03 [73]

Answer:

1112

Step-by-step explanation:

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3 0

3 years ago

Please help me solve for x

ratelena [41]

Hello from MrBillDoesMath!

Answer:

sqrt(6)

Discussion:

The triangle, while not indicated, appears to be a right triangle (i.e. has a 90 degree angle). If so, from the Pythagorean theorem,

x^2 + 3^2 = ( sqrt(15) ) ^ 2 =>

x^2 + 9 = 15 => ( subtract 9 from both sides)

x^2 = 15 - 9 = 6 => (take the square root of both sides)

x= sqrt(6)

Regards,

MrB

7 0

4 years ago

The completion time for an exam is normally distributed with expected value 75 minutes and variance 12 minutes. What is the prob

Debora [2.8K]

Answer:

14.89% or 0.1489

Step-by-step explanation:

First, find the z-score for both 70 and 80 minutes and their corresponding percentile.

$z= \frac{X - \mu }{SD} \\SD=\sqrt{V} =\sqrt{12}\\\mu =75\\z= \frac{X - 75}{\sqrt{12}}\\\\$

For X = 70 minutes:

$z= \frac{70 - 75}{\sqrt{12}}\\z=-1.4434$

This z-score is equivalent to the 7.445 th percentile, so the probability of a student finishing this exam in less than 70 minutes is 7.445%

or X = 80 minutes:

$z= \frac{80 - 75}{\sqrt{12}}\\z=1.4434$

This z-score is equivalent to the 92.555 th percentile, so the probability of a student finishing this exam in more than 80 minutes is 100- 92.555 = 7.445%

Therefore, the probability (P) of a student finishing this exam in less than 70 minutes or more than 80 minutes is:

P = 7.445% + 7.445% = 14.89%

5 0

3 years ago

WILL GIVE BRAINLIESTTTT, FIVESTARS ANDTHANKS<br> PLEASEHELP

SpyIntel [72]

Answer:

3 is the answer

Step-by-step explanation:

answer up above

7 0

3 years ago