3 years ago

What is measure of angle R?

1 answer:

7 0

Tangent (R) = opposite / adjacent = 5 / 12 = 0.416666
arc tangent (.416666) = angle R = 22.62 Degrees

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<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bd%7D%7B7%7D" id="TexFormula1" title="\frac{d}{7}" alt="\frac{d}{7}" align="absmiddle

7nadin3 [17]

Answer: d = 63

Explanation:
d/7 + (-59) = -50
d/7 - 59 = -50
d/7 = -50 + 59
d/7 = 9
d = 9 x 7
d = 63

4 0

3 years ago

PLEASE ANSWER I NEED THIS ASAP

S_A_V [24]

The answer is C the whole shape it a rectangle the two triangles in it are going to be congruent.

4 0

3 years ago

Read 2 more answers

Daryl is 23 years old. His brother Larry is 11 years younger. Which number scentence can you use to find how old Larry is?

Zepler [3.9K]

It is A.

Since his brother is 11 years younger, you would subtract 23-11=12

So Larry is 12 years old.

5 0

4 years ago

Read 2 more answers

The life of a light bulb is exponentially distributed with a mean of 1,000 hours. What is the probability that the bulb will las

liq [111]

Answer:

The probability that the bulb will last more than 1,200 hours is 0.3012

Step-by-step explanation:

Let the random variable X = life of a light bulb .

The random variable $X\sim Exp(\lambda)$

The probability distribution function of exponential distribution is:

$f(x)=\left \{ {{\lambda e^{-\lambda x};\ x>0} \atop {0};\ otherwise} \right.$

The mean of the distribution is, Mean = 1000 hours.

The value of λ is:

$\lambda=\frac{1}{Mean} =\frac{1}{1000}$

Compute the probability that the bulb will last more than 1,200 hours as follows:

$P(X>1200)=1-P(X\leq 1200)\\=1-\int\limits^{1200}_{0} {\lambda e^{-\lambda x}} \, dx \\=1-\lambda[\frac{e^{-\lambda x}}{-\lambda} ]^{1200}_{0}\\=1-[1-e^{-\frac{x}{1000} }]^{1200}_{0}\\=1-[1-e^{-\frac{1200}{1000}}]\\=e^{-1.2}\\=0.3012$

Thus, the probability that the bulb will last more than 1,200 hours is 0.3012.

7 0

3 years ago

Darren runs 1/4 a mile in 2.5 mins. how long will it take him to run a full mile?

rusak2 [61]

it is simple, you multiply 2.5 by 4

2.5*4=10

6 0

4 years ago