Am i doing it right..if not explain why. And if i am help me thru the other process 21 points

Mathematics

2 answers:

Rzqust [24]2 years ago

8 0

You should probably have brackets () around the 4x+25º

Aliun [14]2 years ago

8 0

A triangle's angles sum equals 180°. Try using this equation: 30+4x+25+25=180. Use this equation to find the value of x. Then plug x into 4x+25 to find the measure of Y.

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The equation of a line is x 3y = 14. what is the y-intercept of the line?

Mice21 [21]

y-intercept of the line would be 14 in that case.

SO, YOUR ANSWER IS 14

8 0

2 years ago

A signal light is green for 4 minutes, yellow for 10 seconds, and red for 3 minutes. If you drive up to this light, what is the

posledela

Answer:

0.56 is the required probability.

Step-by-step explanation:

Time for which signal shows green light = 4 minutes

Time for which signal shows yellow light = 10 seconds

Time for which signal shows red light = 3 minutes

To find:

Probability that the signal will show green light when you reach the destination = ?

Solution:

First of all, let us convert each time to same unit before doing any calculations.

Time for which signal shows green light = 4 minutes = 4 $\times$ 60 seconds = 240 seconds

Time for which signal shows yellow light = 10 seconds

Time for which signal shows red light = 3 minutes = 3 $\times$ 60 seconds = 180 seconds

Now, let us have a look at the formula for probability of an event E:

$P(E) = \dfrac{\text{Number of favorable cases}}{\text {Total number of cases}}$

Here, E is the event that green light is shown by the signal.

Number of favorable cases mean the time for which green light is shown and Total number of cases is the total time <em>(Time for which green light is shown + Time for which Yellow light is shown + Time for which red light is shown)</em>

So, the required probability is:

$P(E) = \dfrac{240}{240+10+180}\\\Rightarrow P(E) = \dfrac{240}{430}\\\Rightarrow \bold{P(E) \approx 0.56 }$