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N76 [4]
3 years ago
12

I NEED HELP FASTTTTTTT

Mathematics
1 answer:
Yakvenalex [24]3 years ago
6 0

Answer:

D

Step-by-step explanation:

i hope this helps!

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The quantities xxx and yyy are proportional. xxx yyy 5.85.85, point, 8 5.85.85, point, 8 7.57.57, point, 5 7.57.57, point, 5 11.
Paul [167]

Question:

The quantities x and y are proportional.

x y

5.8 7.5

11.2

Find the constant of proportionality (r) in the equation y=rx

Answer:

The constant of proportionality is 75/58 or 1.29

Step-by-step explanation:

Given

The table above

Required

Find the constant of proportionality

The question has an incomplete table but it can still be solved because x and y are proportional.

Given that

y = rx

Make r the subject of formula

Divide through by x

y/x = rx

y/x = r

r = y/x

When y = 7.5, x = 5.8

Substitute these values

r = y/x becomes

r = 7.5/5.8

Multiply denominator and numerator by 10

r = (7.5 * 10)/(5.8 * 10)

r = 75/58

In this case, it's best to leave the answer in fraction.

However, it can be solved further.

r = 75/58

r = 1.29 (Approximated)

Hence, the constant of proportionality is 75/58 or 1.29

5 0
3 years ago
Read 2 more answers
Robert plays cricket. He hit the ball in such a way that it goes up 180 feet
PilotLPTM [1.2K]

Answer:

4 feet per second

Step-by-step explanation:

Hi there!

v=D/t where v is velocity (speed), D is distance and t is time

Plug in the known values (D=180 feet, t=45 seconds)

v=180/45\\v=4

Therefore, the speed of the ball is 4 feet per second.

I hope this helps!

4 0
3 years ago
Read 2 more answers
Need helping showing step by step answer to solve for f.
Alex73 [517]
You cannot "solve for f" here.  However, you can find the zeros/roots of f.  Set f = to 0.  Then, one by one, set each of the factors = to 0 and solve for x:

x+1=0 results in x=-1; x-5=0 results in x=5, and so on.

Thus, the solutions of f(x)=0 are {-1, 5, -3, 4, 8}
4 0
3 years ago
Please i need some help
Igoryamba
I’m almost positive it’s #1 my bad if it isn’t
5 0
3 years ago
a plane takes off at an angle of elevation of 15 degrees and travels in a straight line for 3,000 meters. What is the height of
nevsk [136]
SOH CAH TOA tells you the sine function of an angle gives the ratio of opposite side to the hypotenuse of the right triangle.
  Sin = Opposite/Hypotenuse
In this problem, the angle is 15°, the hypotenuse is 3000 m and we want to find the length of the opposite side (the height above the ground).

  sin(30°) = height/(3000 m)
Multiplying by 3000 m, we get
  height = (3000 m)*sin(30°) = 1500 m

The height of the plane at that instant is ...
  1500 m
5 0
4 years ago
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