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Lubov Fominskaja [6]
3 years ago
14

RAMPS Rodney is rolling marbles down a ramp. Every second that passes, he measures how far the marbles travel. He records the in

formation in the table shown below.
Make a conjecture about how far the marble will roll in the fifth second.

Mathematics
1 answer:
kow [346]3 years ago
4 0

Using the principle of common difference , we can observe that the <em>distance moved per roll</em> increases by a constant amount of centimeters . Hence, the distance moved in the 5th roll is 180 cm

Setting up a proportional relationship :

  • <em>Second = S </em>
  • <em>Distance = d </em>

<u>The common </u><u>difference</u><u> between each roll can be obtained thus :</u>

d2 - d1 = d3 - d2 = d4 - d3

60 - 20 = 100 - 60 = 140 - 100

40 = 40 = 40

Hence, the common difference = 40

<u>The distance obtained on the fifth roll</u> :

d(5) = d(4) + common difference

d(5) = 140 + 40

d(5) = 180

Therefore, the distance obtained on the fifth roll is 180 cm

Learn more :brainly.com/question/18796573

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(50 POINTS) What is the length of YZ in Triangle XYZ? Explain two different methods that could be used to find this length.
LenKa [72]
<h3>First Method:</h3>

<u>Using cosine rule</u>:

\rightarrow \sf cos(30 ) = \dfrac{YZ}{12}

\rightarrow \sf YZ = 12cos(30 )

\rightarrow \sf YZ = 6\sqrt{3}

\rightarrow \sf YZ = 10.4

<h3>Second Method:</h3>

<u>First find XY using sine rule</u>:

\rightarrow \sf sin(30)=\dfrac{XY}{12}

\rightarrow \sf XY = 12sin(30)

\rightarrow \sf XY =6

Then use Pythagoras Theorem:

⇒ XY² + YZ² = XZ²

⇒ (6)² + YZ² = 12²

⇒ YZ² = 144 - 36

⇒ YZ = √108

⇒ YZ = 6√3

⇒ YZ = 10.4

4 0
2 years ago
Two roads that cross at right angles are used as coordinate axes for a map. A library is located at point L . Use the drop-down
Papessa [141]

The question is incomplete. Here is the complete question:

Two roads that cross at right angles are used as coordinate axes for a map. A library is  located at point L.

Use the drop-down menus to complete the statements about the location of the library.

(a) The library is located at point (_,_).

(b) The library is __  miles from Road X and __  miles from Road Y.

Answer:

(a) The library is located at point (3.25, -1.5).

(b) The library is <u>1.5 miles</u> from Road X and <u>3.25 miles</u> from Road Y

Step-by-step explanation:

Given:

The roads are at right angles to each other. Point 'L' is the location of the library.

(a)

From the graph, we can conclude that,

The length of each square in the graph is 0.5 miles. So,

The coordinates of point L are (3.25, -1.5).

The 'x' value is 3.25 and the 'y' value is -1.5.

Since the point 'L' is the location of library, therefore, the library is located at point (3.25,-1.5).

(b)

The distance of point L from road X is obtained by moving vertically up from point L till we reach the road X. In other words, the perpendicular distance between point L and horizontal x axis is the required distance.

The perpendicular distance is the absolute value of the y-coordinate of point L. The absolute value of 'y' of point L is |-1.5| = 1.5 miles.

Hence, the library is 1.5 miles from road X.

Similarly, the distance of point L from road Y is the perpendicular distance of point L to the road Y.

The perpendicular distance is the absolute value of the x-coordinate of point L. The absolute value of 'x' of point L is |3.25| = 3.25 miles.

Therefore, the library is 3.25 miles from road Y.

So, the library is 1.5 miles from Road X and 3.25 miles from Road Y

8 0
4 years ago
Cesar bought 2 bottles of juice that each hold 2 quarts and another bottle that holds 1 1/2 gallons of juice. How many quarts of
sukhopar [10]
He will buy 1/2 x 8 of juice
8 0
3 years ago
A company tests two new products to make sure they last for more than a year. Product 1 had 950 out of 1,000 test items last for
zheka24 [161]

Answer:

product one; it has a higher success rate

Step-by-step explanation:

to find out which has a higher rate of success we can find out their percentage of success

we can divide their success amounts by test amounts

950 / 1000 = 95/100 = 95%

150/200 = 75/100 = 75%

product 1 has a higher success rate

5 0
3 years ago
There are 60 players on a football team. 2/3 of the players are offensive team players 1/12 of the players are special team play
zysi [14]

Answer:

15

Step-by-step explanation:

2/3 x 60 = 40

1/12 x 60 = 5

60 - 40 - 5 = 15

5 0
3 years ago
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