Answer:
a) 0.72
b) 0.98
Step-by-step explanation:
We are given the following information in the question:
P(passing maths exam) = P(m) = 0.9
P(passing Spanish exam) = P(s) = 0.8
It is assumed that the results of the two exams are independent of each other.
a) probability that she passes both exams
By assumption of independence, we can write:
0.72 is the probability that Josie will pass both the exams.
b) probability that Josie passes at least one of the exam
0.88 is the probability that Josie passes at least one of the exams.
<span> For this case, the first thing we must do is define variables.
We have then:
x: number of devices.
Y: plan charge
For the current plan we have:
</span>
<span> For the new plan we have:
</span>
<span> Since we want the new plan to be smaller than the current plan, then we have:
</span>
<span> From here, we clear the value of x:
</span>
<span>
Answer: x <18 Note: The graph is correct</span>
The answer is
<span>2 x minus 20 divided by 3 = 2x
equivalent of </span><span>
</span>(2 x -20) / 3 = 2x
for solving it, <span><span>(2 x -20) = 2x . (3) is sufficient
</span> </span>
so <span>2 x -20 = 6x </span><span> -20 = 6x - </span><span>2 x and -20 = 4x so x = -5</span>
Answer:
thanks
Step-by-step explanation:
Answer: 40°
Step-by-step explanation: The formula for calculating the size of an exterior angle is: exterior angle of a polygon = 360 ÷ number of sides. So it's 360°÷9=40°
