Answer:
it is 25
Step-by-step explanation:
Answer:
C. (4 , –1)
Step-by-step explanation:
<h2>—Math</h2>
x + y = 3
y = x –5
...........
<h3>eliminate y</h3>
x + y = 3
–x + y = –5
__________–
2x = 8
x = 4
x + y = 3
4 + y = 3
y = 3 –4
y = –1
The simplest form is 7/13.
Answer:
c
Step-by-step explanation:
From the given above, we calculate for the total cycle time by adding up all the durations given for the yellow light, red light, and green. That is,
total time = 30 s + 10 s + 50 s = 90s
Hence, the total time is equal to 90 s. From this, we calculate for the probability that the first light that will be seen is a red light by dividing the duration of the red light in the cycle by the total time.
Probability = (30 seconds) / (90 seconds)
= 1/3
Therefore, the probability that the red light will be seen first is equal to 1/3. The answer is second choice.