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3 years ago

I need help please, I dont know how to do this

Mathematics

1 answer:

Oliga [24]3 years ago

3 0

Answer:

Step-by-step explanation:

Odd numbers backwards - 9, 7, 5, 3

1 = -2+9=7

2 = -1+7=6

3 = 0+5=5

4 = 1 +3=4

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The numbers 1-4 are each written on an index card. The 4 cards are put into a bag and 2 of them are drawn at random. What is the

devlian [24]

Answer:

Step-by-step explanation:

Write a list of all possible outcomes

1-2

1-3

1-4

2-1

2-3

2-4

3-1

3-2

3-4

4-1

4-2

4-3

There are 12 possible outcomes. How many of them have totals of 6 or 7

I count 4

So the probability is 4/12 = 1/3, just as you said.

Is there an easier way?

You might be able to get the 12 easier.

You have 4 choices for the first number and 3 for the second.

P(12) = 4*3 = 12

Getting 6 or 7 might be somewhat trickier.

4 and 3 make seven. That gives two ways 4-3 and 3-4

4 and 2 make six. That gives 2 more ways 4-2 and 2-4

That's all that's possible.

answer: 4 ways make success. The total number of ways is 12.

7 0

3 years ago

Beth bought two pairs of earrings for $12.00 each. She also had to pay 6% sales tax. What was her total bill?$12.72$19.20$25.44$

Zinaida [17]

Beths earrings were $25.44 after taxes.

6 0

3 years ago

Read 2 more answers

I dont understand anything

Leviafan [203]

Answer:

Step-by-step explanation:

4 0

3 years ago

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Let u = <-4, 3>. Find the unit vector in the direction of u, and write your answer in component form. (2 points)

lana66690 [7]

Answer: < -4/5, 3/5>

This is equivalent to writing < -0.8, 0.6 >

======================================================

Explanation:

Draw an xy grid and plot the point (-4,3) on it. Draw a segment from the origin to this point. Then draw a vertical line until reaching the x axis. See the diagram below.

We have a right triangle with legs of 4 and 3. The hypotenuse is $\sqrt{4^2+3^2} = \sqrt{16+9} = \sqrt{25} = 5$ through use of the pythagorean theorem.