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3 years ago

11

What is 2/7 ÷ 4/5 ? Plz help

1 answer:

dem82 [27]3 years ago

4 0

Answer:

5/14

Step-by-step explanation:

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Somebody help me solve;

Nadya [2.5K]

P(at least 5 rolls until 1) = P(4 rolls are not 1) = 5/6 x 5/6 x 5/6 x 5/6 = 0.4823 (4sf)

Fewer than 7 rolls to get second 1 after first takes 3 rolls means second occurs on 4th, 5th or 6th roll
The probability of each of these is 1/6, 5/6 x 1/6 and 5/6 x 5/6 x 1/6 respectively.
P(second 1 on 4th, 5th or 6th roll) = 1/6 + 5/36 + 25/216 = 91/216 = 0.4213 (4sf)

3 0

1 year ago

Find the range for the measure of the third side of a triangle given that the measures of two sides are 13 and 27.

IgorLugansk [536]

Answer:

<em>0 < X < 40</em>

Explanation:

[ Leg A ] 13

[ Leg B ] 27

[ Leg C ] x

Since We Are Missing The Third Side Of The Triangle.

x Has To Be Greater Than 0 But Less Than 40

6 0

3 years ago

Raquel has created a program for a robot. The robot travels 10 meters and stops. The program is designed for wheels that are 2.5

Grace [21]

Answer:

Raquel should adjust the number of rotations to 115.81 rotations

Step-by-step explanation:

step 1

Find the circumference of the wheels that are 2.5 cm in diameter

The circumference is equal to

$C=2\pi r$

we have

$r=2.5/2=1.25\ cm$

assume

$\pi =3.14$

substitute

$C=2(3.14) (1.25)$

$C=7.85\ cm$

step 2

Find the number of rotations

Divide 10 meters by the circumference

$10\ m=1,000\ cm$

$1,000/7.85=127.39\ rotations$

step 3

For a diameter of 2.75 cm find how should she adjust the number of rotations so that the robot travels the same distance

Find the circumference of the wheels

The circumference is equal to

$C=2\pi r$

we have

$r=2.75/2=1.375\ cm$

assume

$\pi =3.14$

substitute

$C=2(3.14) (1.375)$

$C=8.635\ cm$

step 4

Find the number of rotations

Divide 10 meters by the circumference

$10\ m=1,000\ cm$

$1,000/8.635=115.81\ rotations$

3 0

3 years ago

Find the distance between the points (0,-1)and (3,-3)

Arturiano [62]

Answer:

√13

Step-by-step explanation:

Distance = √(3-0)² + (-3+1)²

= √ (3)². +(-2)²

=. √ 9+4

= √ 13

May this help you !!!!

4 0

3 years ago

Anil wants to multiply 5, 6, and 3. Which expression could Anil write in the box to

matrenka [14]

Answer:

5x18

Step-by-step explanation:

5x6x3 and 5x18 equal 90

6 0

3 years ago

Read 2 more answers