Answer:
x is 4 I think
Step-by-step explanation:
I'm not sure I might be wrong
Answer:
150
Step-by-step explanation:
3000/20
150.
$$$$$$$$$$$$$$$$$
Step-by-step explanation:
a=<u>bx + cx</u>
2
2*a=<u>x(b+c)</u>*2
2
<u>2a</u> = <u>x(b+c)</u>
(b+c) (b+c)
<u>2a</u> = x
(b+c)
Let the number of child tickets sold be x, and number of adult tickets be y, then
5.70x + 9.50y = 543.40 . . . (1)
y = 2x . . . (2)
Putting (2) into (1), gives
5.7x + 9.5(2x) = 543.4
5.7x + 19x = 543.4
24.7x = 543.4
x = 543.4/24.7 = 22
Therefore, 22 child tickets were sold.
Using a calculator, it is found that the equation of linear regression that fits the data is given by:
C. y=-0.295x+20.667
<h3>How to find the equation of linear regression using a calculator?</h3>
To find the equation, we need to insert the points (x,y) in the calculator.
In this problem, the points are given as follows: (1, 20.71), (2, 19.69), (3, 19.61), (4, 19.64), (5, 19.26). Hence the equation is:
Doing this, the equation is:
y = -0.295x + 20.667.
Hence option C is correct.
More can be learned about an equation of linear regression at brainly.com/question/17261411
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