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emmainna [20.7K]
3 years ago
13

Help!! I need help with my math!!

Mathematics
2 answers:
Firlakuza [10]3 years ago
5 0

Step-by-step explanation:

thank \: you

Vlad [161]3 years ago
4 0
50+75=125
125-180=55
The answer equal to 55
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A 97% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit. A prelimina
ivann1987 [24]

Answer:

The sample size will be "102.5494 \sim 102". A further explanation is given below.

Step-by-step explanation:

Let the sample size will be:

= n

The given values are:

Standard deviation,

= 1.4

ME,

= 0.3

As we know,

⇒ n=(Z \frac{a}{2}\times \frac{SD}{E})^2

On putting the estimated values, we get

⇒    =(2.17\times \frac{1.4}{0 .3})^2

⇒    =(\frac{3.038}{0.3})^2

⇒    =102.5494 \sim 102

4 0
3 years ago
What is the solution of the system? use substitution. 5x - y =3 6x - y=8
Bess [88]
5x - y = 3 ------------ (1)
6x - y = 8 ------------ (2)

From (1):
5x - y = 3
y = 5x - 3 ------------ Sub into (2)

6x - (5x - 3) = 8
6x - 5x + 3 = 8
x + 3 = 8
x = 5 ------------------- Sub into (1)

5x - y = 3
5(5) - y = 3
25 - y = 3
y = 25 - 3
y = 22

---------------------------------
Ans: x = 5, y = 22
---------------------------------

5 0
3 years ago
Three less than 2 times a number is 55. What is the number?
-Dominant- [34]
Let the number be x.

2x-3=55
2x=55-3
2x=52
x=52/2
x=26
6 0
3 years ago
Probability and Statics QUESTION!!!! please help!!
marissa [1.9K]

number of pockets inside jacket

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3 years ago
Use an addition property to solve for B
stich3 [128]

Answer:

B.

Step-by-step explanation:

5 0
3 years ago
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