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Annette [7]
3 years ago
5

IM GIVING 20 POINTS AWAY PLEASE HELP ME WITH QUESTIONS 2-4 AND EXPLAIN HOW YOU GOT YOUR ANSWER PLEASE!!!!!

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
7 0

Answer:

2:(90) 4:B

Step-by-step explanation:

so what you do for 2 is that you times all the number thann  you get youar ansmwer and for 4 you times 6 time 10 and thime 24 you get your answer

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A researcher obtained M = 27 for a sample of n = 36 scores selected from a population with µ = 30 and σ = 18. This sample mean c
dusya [7]

Answer:

True

Step-by-step explanation:

Given that:

M = 27, sample of n = 36 scores, µ = 30 and σ = 18.

The z score is used in statistics to determine by how many standard deviations the raw score is above or below the mean. If the z score is positive, the raw score is greater than the mean and if the z score is negative the raw score is less than the mean. The z score is given as:

z=\frac{x-\mu}{\sigma}

Given that M = 27, this means that x = 27. Therefore:

z=\frac{x-\mu}{\sigma}\\\\for \ a\ sample\ size(n):z=\frac{x-\mu}{\sigma/\sqrt{n} }\\\\z=\frac{27-30}{18/\sqrt{36} } =\frac{-3}{3}=-1

This sample mean corresponds to a z-score of z = –1.00.

7 0
3 years ago
Enlarge shape a by 1/3 with the centre enlargement (3,-3) <br> (-9,9) (-9,6) (-3,6)
NemiM [27]

Answer:

0033

Step-by-step explanation:

.033 of a whole number so its .033

5 0
3 years ago
S= zh - 2zt^3 solve for z
zysi [14]

Hi ;-)

s=zh-2zt^3\\\\z(h-2t^3)=s \ \ /:(h-2t^3)\\\\z=\dfrac{s}{h-2t^3}

6 0
3 years ago
Read 2 more answers
Find the rule for the sequence<br> First term: 2 3/4<br> Sixth term: 3 7/12<br> Rule:_______
Fantom [35]
K, so areitmetic

an=a1+d(n-1)
a1=first term
d=common differnce

we are given
a1=2 and 3/4
6th term is 3 and 7/12

so

a6=3 and 7/12=2 and 3/4+d(6-1)
3 and 7/12=2 and 3/4+d(5)
minus 2 and 3/4 both sides
10/12=5d
divide both sides by 5 or multiply both sides by 1/5
2/12=d
1/6=d


a_n=2 \frac{3}{4}+ \frac{1}{6}(n-1) or
a_n=2 \frac{7}{12}+ \frac{1}{6}n
that is the rule
4 0
3 years ago
How many 3-digit numbers exist, whose digits are distinct even numbers.
skad [1K]

Answer:

328

Step-by-step explanation:

If z is 0, then x has 9 choices. Therefore, z and x can be chosen in (1 × 9) + (4 × 8) = 41 ways. For each of these ways, y can be chosen in 8 ways. Hence, the desired number is 41 × 8 = 328 numbers 3-digit even numbers exist with no repetitions.

7 0
3 years ago
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