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3 years ago

PLZ HELP ME!!!!!

Mathematics

1 answer:

solong [7]3 years ago

5 0

Answer:

divide or multiply............

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Jane has a deck of 10 cards numbered 1 through 10. She is playing a game of change This game is this: Jane chooses one card from

nikklg [1K]

we know that

total cards=10

even numbers=2,4,6,8,10 -----> 5 cards

the probability that getting an even number is

P=5/10

The probability that getting an odd number

n 1 -----> P=1/10

n3 ----> P=1/10

n5 ---> P=1/10

n7 ----> p=1/10

n 9 ---> P=1/10

The expected value is equal to

EV=(1)(1/10)+(3)(1/10)+(5)(1/10)+(7)(1/10)+(9)(1/10)-(4.20)(5/10)

EV=(25/10)-(21/10)

EV=4/10

EV=$0.40

<h2>The expected value is $0.40</h2>

Part B

Jane can expect to win money after playing the game many times

the answer is

<h2>Jane can expect to gain money</h2><h2>She can expect to win $0.40 per draw</h2>

4 0

1 year ago

If x=6, what is the smallest natural number y that makes x2+y2 rational?

Nikitich [7]

Given: If x=6, what is the smallest natural number y that makes x2+y2 rational .

To Find: Smallest value if y so that the expression is rational .

Solution : On substituting x = 6 , we have

$=> x^2+y^2= 6^2+y^2\\\\ x^2+y^2= 36+y^2$

Now for the whole expression has minimum value y^2 should be minimum , also y should be natural no. The set of Natural no. is ,

$=> N=\{ 1,2,3,4,... ..,\infty\}$

Therefore the smallest Natural no. is 1 . Therefore minimum value of y is 1.

The minimum value of y is 1.

6 0

3 years ago

The expression - 340 + 13x represents a submarine that began at a depth of 340 feet below sea

kirill115 [55]

Answer:

A) The submarine was -249 feet below sea level after 7 minutes.

B) The submarine will have reached sea level after 26.15384615384615 minutes.

Step-by-step explanation:

x = 7 minutes

So...

Our equation will be -340 + 13 x 7 =

First, we will solve the multiplication.

13 x 7 = (10 x 7) + (3 x 7) = 70 + 21 = 91.

Then, we solve the addition. -340 + 91 = 340 - 91 = 249

So, the submarine was -249 feet below sea level after 7 minutes.

-kiniwih426

8 0

3 years ago

A triangle is rotated 90° about the origin. Which rule describes the transformation?

Jlenok [28]

The correct answer is (x, y) → (–y, x).

3 0

4 years ago

Read 2 more answers

A swimming pool is in the shape of a regular decagon. One edge of the pool is directly against the outside wall of a house. Find

Mazyrski [523]

Answer:

36 degrees.

Step-by-step explanation:

Total Sum of the Exterior Angle of a Regular Polygon $=360^0$

One Exterior Angle of a n-sided regular polygon $=\dfrac{360^0}{n}$

A decagon has 10 sides.

One Exterior Angle of a decagon $=\dfrac{360^0}{10}=36^0$

Therefore, the measure x of the angle between the house and the pool is 36 degrees.

6 0

3 years ago