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2 years ago

I really dont understand helpppp

Mathematics

1 answer:

Otrada [13]2 years ago

3 0

Answer:

The sum of angles of a tiangle equals 180 degrees.

180-(92+51)=37 degrees (angle BEC)

180-(98+35)=47 degrees (angle DEC)

360-166-37-47=100 degrees (angle AED)

Step-by-step explanation:

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A bag contains 48 skittles, identical except for color. There are twice as many yellow as red skittles and twice as many blue as

d1i1m1o1n [39]

Answer: x=17

Step-by-step explanation:

(5 + x)/(16 + x) = 2/3

Cross multiply to get:

15+3x = 32 + 2x

3 0

3 years ago

(b) For a giveaway, a local radio station is putting together goodie bags. The bags will include tickets and posters. Each bag w

jolli1 [7]

6 goodie bags. 6 is the greatest common factor of 54 and 36.

<span>9 tickets and 6 posters in each bag.</span>

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3 years ago

On a hiking trip, Melissa notes that she hikes about 16 kilometers every 2.5 hours. If she continues at this rate, about how man

svp [43]

Answer:

so if she hike 12 km every 4 hours, how many km could she hike in 6 hours.

first u have to find the equation. 12 km=4hours

? =6hours

and then you have to multiply 12 km by 6 hours and divide the results by 4 which is 12×6÷4. the final answer will be 18 kilometers.

Step-by-step explanation:

Sorry if its wrong

5 0

2 years ago

A bus travels on an east-west highway connecting two cities A and B that are 100 miles apart. There are 2 services stations alon

melamori03 [73]

Answer:

51/4

Step-by-step explanation:

To begin with you have to understand what is the distribution of the random variable. If X represents the point where the bus breaks down. That is correct.

X~ Uniform(0,100)

Then the probability mass function is given as follows.

$f(x) = P(X=x) = 1/100 \,\,\,\, \text{if} \,\,\,\, 0 \leq x \leq 100\\f(x) = P(X=x) = 0 \,\,\,\, \text{otherwise}$

Now, imagine that the D represents the distance from the break down point to the nearest station. Think about this, the first service station is 20 meters away from city A, and the second station is located 70 meters away from city A then the mid point between 20 and 70 is (70+20)/2 = 45 then we can represent D as follows

$D(x) =\left\{ \begin{array}{ll} x & \mbox{if } 0\leq x \leq 20 \\ x-20 & \mbox{if } 20\leq x < 45\\ 70-x & \mbox{if } 45 \leq x \leq 70\\ x-70 & \mbox{if } 70 \leq x \leq 100\\ \end{array}\right.$

Now, as we said before X represents the random variable where the bus breaks down, then we form a new random variable $Y = D(X)$ , $Y$ is a random variable as well, remember that there is a theorem that says that

$E[Y] = E[D(X)] = \int\limits_{-\infty}^{\infty} D(x) f(x) \,\, dx$

Where $f(x)$ is the probability mass function of X. Using the information of our problem

$E[Y] = \int\limits_{-\infty}^{\infty} D(x)f(x) dx \\= \frac{1}{100} \bigg[ \int\limits_{0}^{20} x dx +\int\limits_{20}^{45} (x-20) dx +\int\limits_{45}^{70} (70-x) dx +\int\limits_{70}^{100} (x-70) dx \bigg]\\= \frac{51}{4} = 12.75$

3 0

3 years ago

The angles below are supplementary. What is the value of x?

insens350 [35]

Answer:

see the attached picture please

6 0

3 years ago