What is the value of x

Mathematics

2 answers:

Dmitriy789 [7]3 years ago

6 0

x=10 because you add the variables to get 5x and you do 46-6 to get 40. Then you subtract 40 from 90 to get 50 and divide by 5 to get 10 as ur answer.

Cloud [144]3 years ago

3 0

The two angles are part of the bigger 90 degree angle, so the sum of the two angles is 90°. So, an equation can be made: $(2x+46)+(3x-6)=90$

Solve it to find the value of x. It is 10.

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If students’ scores were normally distributed and the mean was 200 with a standard deviation of 40, then what is the probability

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Answer:

84%

Step-by-step explanation:

The empirical rule tells you that 68% of the standard normal distribution is within 1 standard deviation of the mean. The distribution is symmetrical, so the amount in the lower tail is (1 -68%)/2 = 16%.

Since the number you're interested in, 240, is one standard deviation above the mean (200 +40), the percentage of interest is the sum of the area of the central part of the distribution along with the lower tail:

68% + 16% = 84%.