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ASHA 777 [7]
3 years ago
12

30

Mathematics
1 answer:
storchak [24]3 years ago
7 0

Answer:

what does 30 yldpri the linear relationship have do with it

Step-by-step explanation:

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Jeremy's score was 1.75 standard deviations above the mean. which kf thr following is closest to his percentile rank
Gelneren [198K]
The answer is 96%.

Explanation:
It is generally presumed that the scores are normally distributed.

1) You are given how many standard deviations from the mean Jeremy's score is. This is exactly the definition of the z-score. Therefore z = 1.75

2) Look at a left-tail z-table in order to find the area of the normal curve on the left of your z-score (see picture attached). A = 0.9599

3) Multiply the area by 100 in order to find the percentile:
<span>0.9599 </span>× 100 = 95.99
Therefore, 95.99% of the students scored less than Jeremy.

Hence, the answer is 96%.

4 0
3 years ago
5 x a x 5 x a simplified
Fittoniya [83]

Answer:

5a^2

Step-by-step explanation:

5ax5a=5a^2

3 0
3 years ago
our buses carrying 140 high school students arrive to Montreal. The buses carry, respectively, 31, 43, 27, and 39 students. One
Vinvika [58]

Answer:

V(X)= 39.10

V(Y)= 40

Step-by-step explanation:

Given that

Total number of student = 140

Bus A - 31

Bus B- 43

Bus C- 27

Bus D- 39

The probability that a student was on the bus is proportional to the number of student. Eg 31/140 in bus A, 43/140 on bus B, ...

E(X) = (31*31/140) + (43*43/140)  + (27*27/140) + (39*39/140)

=  35.5

Var(X) =(31-35.5)^2 \times \dfrac{31}{140}+(43-35.5)^2 \times \dfrac{43}{140}+(39-35.5)^2 \times \dfrac{39}{140}+(27-35.5)^2 \times \dfrac{27}{140}

V(X)= 39.10

The bus driver have  1/4 probability on being on any of the buses.

E(Y) = 140/4 = 35

Var(Y)=\dfrac{(35-31)^2+(35-43)^2+(35-27)^2+(35-39)^2}{4}

V(Y)= 40

7 0
3 years ago
Which quadratic equation defines the function that has zeros at -8 and 6?
irga5000 [103]

Answer: it is A

Step-by-step explanation:

x^2+2x-48=0

x^2+8x-6x-48=0

x×(x+8)-6(x+8)=0

(x+8)×(x-6)=0

x+8=0

x-6=0

x=-8

x=6

6 0
4 years ago
PLEASE LOOK AT PICTURE AND HELP!!!
Kobotan [32]

Answer:

answer A

Step-by-step explanation:

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7 0
3 years ago
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