Measuring Circles: Question 1

Mathematics

1 answer:

andreev551 [17]3 years ago

7 0

Answer:10.51inches

Step-by-step explanation:

circumference=66

Radius=circumference ➗ (2xπ)

Radius=66 ➗ (2x3.14)

Radius=66 ➗ 6.28

Radius=10.51inches

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a marble is rolled down a ramp. The distance it travels is described by the formula d=490T^2 where d is the distance in centimet

Helga [31]

Answer:

The period when its more than halfway

= 2 < t ≤ 2.83 seconds ( to nearest hundredth).

Step-by-step explanation:

When is is halfway down the ramp d = 3920/2 = 1960 cm, so:

1960 = 490 t^2

t^2 = 1960/490 = 4

t = 2 seconds.

When it reaches the bottom d = 3920 :

t^2 = 3920/490 = 8

t = 2.83 seconds.

5 0

4 years ago

Whats is y=1/3x+2 This is for math

marusya05 [52]

Answer:

an equation of a line

Step-by-step explanation:

This is an equation of a line. Lets walk through it.

y=1/3x+2

This is to find out what the Y coordinate would be when X is plugged in. So, if x was 6, you would take 1/3 of 6 to get 2, and add 2. The y intercept would be 4, since y=1/3(6)+2, y=2+2, y=4

Y=1/3x+2

This is what the slope is. If the slope is negative (ie. -3/4) the greater the x intercept the lower the y will be. (so if I had x=4 for a slope of -3/4, that would be y=-3/4(4)+2, y=-3+2, y=-1) But if the slope is positive (ie. 1/3) the greater the x value the greater the y value as well. (see graph attached below for positive)

Y=1/3x+2

This is the Y intercept. (This is NOT the y coordinate. This is only the coordinate of y if x=0) This number tells you where the Y intercept is. If it adds, the y intercept is positive. If it subtracts, the y intercept is negative.

Sorry if these explainations dont make sense. But, here is the graph for y=1/3x+2