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g100num [7]
4 years ago
13

The grade-point average in an econometrics examination was normally distributed with a mean of 75. In a sample of 10 percent of

students it was found that the grade-point average was greater than 80. Can you tell what the s.d. of the grade-point average was?
Mathematics
1 answer:
never [62]4 years ago
3 0

To solve a standard deviation we require a specific result for each data. So this question(data from question) can not be enough to solve standard deviation.

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Dental insurance costs $130 annually. How much should you budget monthly for dental insurance? $30 $20 $18 $11. Tell me in the C
Advocard [28]

Answer:

11

Step-by-step explanation:

there are 12 months in a year

we want to equally split the 130 into 12 equal payments

130/12=10.833 or 11

7 0
3 years ago
In the figure below, segment CD is parallel to segment EF and point H bisects segment DE :
Grace [21]

Answer:

See explanation

Step-by-step explanation:

In the figure below, segment CD is parallel to segment EF, DE is a transversal, then angles DIH and HGI are congruent as alternate interior angles when two parallel lines are cut by a transversal.

Consider triangles DIH and EGH. In these triangles,

  • \angle DIH\cong \angle EGH as alternate interior angles;
  • \angle DHI\cong \angle GHE as vertical angles;
  • DH\cong HE because point H bisects segment DE (given).

Thus,

\triangle DIH\cong \triangle EGH by AAS postulate

4 0
3 years ago
What positive integers are in the solution set for 3x - 1 < 7?
Lelechka [254]

Answer:

unknsnkdfgfn-u

Step-by-step explanation:

6 0
3 years ago
A theater charges 11 dollars per ticket for a show. However, to put on the show, they rent out an auditorium for $150. If t is t
vfiekz [6]

Answer:

11t-150

Step-by-step explanation:

t is the number of tickets. Each ticket costs $11, therefore we can write 11t.

We need to subtract the price for the rent of the auditorium to find the amount the theatre makes overall, therefore:

11t-150

3 0
3 years ago
Why is the product of two negative numbers positive?<br><br> Please help
saveliy_v [14]

Answer:

There are two simple rules to remember: When you multiply a negative number by a positive number then the product is always negative. When you multiply two negative numbers or two positive numbers then the product is always positive.

Step-by-step explanation:

3 0
3 years ago
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