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emmasim [6.3K]
3 years ago
7

Two planes are flying in opposite directions, away from each other, one with the speed of 800 km per hour and the other with the

speed of 840 km per hour. How much farther from each other are the planes getting every hour?
Mathematics
2 answers:
allsm [11]3 years ago
3 0
1640 km every hour is the answer
AveGali [126]3 years ago
3 0
T the average speed of the first plane is 640 km/h, and the speed of the second plane is 640*0.75 = 480 km/h
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6x-3y= -6 solve for y
kirill [66]

y=2+2x

Move all terms that don't contain y

to the right side and solve.

6 0
3 years ago
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A survey of students' favorite sports was taken from a random sample of
White raven [17]

Answer:

129

Step-by-step explanation:

Considering the survey to be representative, you can simply multiply the share of students <em>p</em> preferring “Track & Field” with the whole school population at the same time to estimate the number of such students in the whole school.

First we need to find the relative share <em>p</em> of such answers in the study by dividing it by the sum of answers, assuming that the table is complete for that random sample:

<em>p</em> = 4/(8 + 5 + 4) = 4/17

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6 0
2 years ago
A movie theater owner made this box plot to represent attendance at the matinee movie last month.
tatuchka [14]

Answer:

D? maybe, I'm not sure. it jsut makes the most sense.

5 0
3 years ago
Evaluate the function f (x)= x squared -4x+1 at the given values of the independent variable and simplify.
Ivan
<h3>Given</h3>

... f(x) = x² -4x +1

<h3>Find</h3>

... a) f(-8)

... b) f(x+9)

... c) f(-x)

<h3>Solution</h3>

In each case, put the function argument where x is, then simplify.

a) f(-8) = (-8)² -4(-8) +1 = 64 +32 + 1 = 97

b) f(x+9) = (x+9)² -4(x+9) +1

... = x² +18x +81 -4x -36 +1

... f(x+9) = x² +14x +46

c) f(-x) = (-x)² -4(-x) +1

... f(-x) = x² +4x +1

8 0
3 years ago
Consider angle θ in Quadrant II, where sinθ = 4/5 . What is the value of cosθ?
Kay [80]

Answer:

3/5

Step-by-step explanation:

sin theta=opposite/hypotenuse

4/5=opposite/hypotenuse

therefore opposite=4 and hypotenuse=5

for adjacent

using pythagoras theorem

a^2+b^2=c^2

opposite^2 + adjacent^2 =hypotenuse^2

4^2 + adjacent^2 =5^2

16 + adjacent^2 =25

adjacent^2 =25-16

adjacent =\sqrt{9

adjacent=3

cos theta=adjacent/hypotenuse

=3/5

therefore the value of cos theta is 3/5

8 0
3 years ago
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