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kirza4 [7]
2 years ago
12

Hello can u help plz?

Mathematics
1 answer:
I am Lyosha [343]2 years ago
7 0

Answer:

slope would be 3 or 3/1

Step-by-step explanation:

I think i'm not totally sure it could be -3 or -3/1

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The following information is obtained from two independent samples selected from two normally distributed populations.
AysviL [449]

A. The point estimate of μ1 − μ2 is calculated using the value of x1 - x2, therefore:

μ1 − μ2 = x1 – x2 = 7.82 – 5.99

μ1 − μ2 = 1.83

 

B. The formula for confidence interval is given as:

Confidence interval = (x1 –x2) ± z σ

where z is a value taken from the standard distribution tables at 99% confidence interval, z = 2.58

and σ is calculated using the formula:

σ = sqrt [(σ1^2 / n1) + (σ2^2 / n2)]

σ = sqrt [(2.35^2 / 18) + (3.17^2 / 15)]

σ = 0.988297

 

Going back to the confidence interval:

Confidence interval = 1.83 ± (2.58) (0.988297)

Confidence interval = 1.83 ± 2.55

Confidence interval = -0.72, 4.38

3 0
3 years ago
Solve the system of equations.<br> 3x 2 y = 2<br> x+7y=4
lions [1.4K]
4/7 the question is relative
8 0
3 years ago
The number of E.coli bacteria cells in a pond of stagnant water can be represented by the function below, where A represents the
liq [111]

Answer:

  • <u>Option B. 59%</u>

Explanation:

The function that represents the number of E.coli bacteria cells per 100 mL of water as the time t years elapses is:

  • A(t)=136(1.123)^{4t}

The base, 1.123, represents the multiplicative constant rate of change of the function, so you just must substitute 1 for t in the power part of the function:

  • rate=(1.123)^{4t}=(1.123)^4=1.590

Then, the multiplicative rate of change is 1.590, which means that every year the number of E.coli bacteria cells per 100 mL of water increases by a factor of 1.590, and that is 1.59 - 1 = 0.590 or 59% increase.

8 0
3 years ago
The cost of a new car is
seraphim [82]

Answer:

$24,000

Step-by-step explanation:

1. Find what 20% of 30,000 is.

20% x 30,000 = 6,000

2. The problem says the cost of a new car is 20% greater than a used car. Subtract the 6,000 from 30,000 to get the cost of the used car.

30,000 - 6,000 = 24,000

3. The cost of the used car is $24,000

5 0
3 years ago
if x stands for am number what is the mathematical phrase that represents three more than the number​
vlada-n [284]

Answer:

x + 3

Step-by-step explanation:

if x represents a number then 3 more than the number means addition of 3 to the number ( x )

so, required phrase is ;

=》x + 3

8 0
3 years ago
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