Answer:
23 friends
Step-by-step explanation:
Let the number of friends she has = x
Total number of gum = 47 pieces
She gave 2 each to her friends, hence:
2x + 1 = 47
2x = 47 - 1
2x = 46
x = 46/2
x = 23
Therefore, the number of friends she has is 23
Answer:
(x , y) = (2 , 1)
Step-by-step explanation:
// Solve equation [1] for the variable x
[1] x = -4y + 6
// Plug this in for variable x in equation [2]
[2] -(-4y+6) - 2y = -4
[2] 2y = 2
// Solve equation [2] for the variable y
[2] 2y = 2
[2] y = 1
// By now we know this much :
x = -4y+6
y = 1
// Use the y value to solve for x
x = -4(1)+6 = 2
Answer:
The radius of the cylinder is 2.92 cm
Explanation:
Given:
Volume of cylinder, V = 193 cm³
Height of the cylinder, h = 7.2 cm
Radius of the cylinder, r = ?
We know:
Volume of cylinder = πr²h
On substituting the value we get:
193 = 3.14 X r^2 X 7.2\\\\r^2 = 8.54\\\\r = 2.92 cm
Therefore, the radius of the cylinder is 2.92 cm
MARK BRAINLIEST PLZZ
Answer:
The margin of error (M.E) = 3.51
Step-by-step explanation:
<u>Explanation</u>:-
Given data a large school district in Connecticut wants to estimate the average SAT score of this year’s graduating class.
The district takes a simple random sample of 100 seniors.
The sample size 'n' = 100
given data the sample mean is 510 and the population standard deviation for SAT scores is known to be 75.
mean of the sample = 510
population standard deviation σ = 75.
Given data they want an interval that "likely" contains the true mean, where "likely" means "the procedure has a 68% success rate".
level of significance = 68% =0.68
Z-score of 68% of level of significance = 0.468
<u>Margin of error</u>:-
The margin of error of at 68% of confidence intervals.


Margin of error = 3.51
<u>Conclusion</u>:-
Margin of error = 3.51 at 68% of confidence interval