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RoseWind [281]
3 years ago
12

1. Using the diagram below, answer the following question. Arthur is at the coordinate A(20,35), Cameron is at the coordinate C(

65,40), and Jamie is at the coordinate J(45,20).
Arthur kicks the ball to Cameron in the soccer game. Jamie wants to intercept the ball at the midpoint of the distance between Arthur and Cameron. What is the coordinate of the midpoint that Jamie must run towards? Write your answer as a decimal, if necessary. ​

Mathematics
1 answer:
statuscvo [17]3 years ago
8 0

Answer:

(42.5, 37.5)

Step-by-step explanation:

Given:

Arthur = A(20, 35)

Cameron = C(65, 40)

Jamie = J(45, 20)

Required:

Coordinate of the midpoint of the distance between A and C.

SOLUTION:

Midpoint (M) of AC, is given as:

M(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2})

Let A(20, 35) = (x_1, y_1)

C(65, 40) = (x_2, y_2)

Plug the values into the given formula:

M(\frac{20 + 65}{2}, \frac{35 + 40}{2})

M(\frac{85}{2}, \frac{75}{2})

M(42.5, 37.5)

Coordinate Jamie should run towards is (42.5, 37.5)

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Marizza181 [45]

Answer:

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And rounded up we have that n=421

Step-by-step explanation:

We know that the sample proportion have the following distribution:

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In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by \alpha=1-0.90=0.1 and \alpha/2 =0.05. And the critical value would be given by:

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And on this case we have that ME =\pm 0.04 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

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n=\frac{0.5(1-0.5)}{(\frac{0.04}{1.64})^2}=420.25  

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5 0
3 years ago
A child bus ticket costs $0.40 and an adult’s ticket costs $0.70. A group of 11 individuals pays $5.90 for their fare.
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Here we have a system of equation like this:
A+B=11\\
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Hope this helps!
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