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anyanavicka [17]
3 years ago
5

A set of cards has 20 cards with stars, 10 cards with squares, and 15 cards with circles. Find the probability of each event whe

n a card is chosen at random.
1. square
2. circle
3. star or circle
4. not circle or square

There are 14 girls and 18 boys in Ms. Wiley's class. Ms. Wiley randomly selects on student to solve a problem. Find the probability of each event.

5. selecting a boy

6. selecting a girl
Mathematics
1 answer:
Bezzdna [24]3 years ago
3 0

1 (square) is 2/9, .22 repeating, and 22 2/9%

2. (circle) is 1/3, .33 repeating, and 33 1/3%

3. (star or circle) is 7/9, .77 repeating, and 77 7/9% sorry I couldn't finish the rest of them. dad told me to get off the computer.

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Read 2 more answers
Please help me I really need help
Oliga [24]

Answer:

Step-by-step explanation:

(1) 2x - 6y = -12

(2) x + 2y = 14

There is a -6y and a +2y. Since they have opposite signs, I'll try to eliminate the y terms. (That's my choice. There is more than one way to solve these.)

Multiply eq. (2) by 3:

3x + 6y = 42

Then add the result to eq. (1) to eliminate the y terms:

2x - 6y = -12

3x + 6y = 42

------------------

5x   = 30,  so x = 6

Now plug the value of x into eq. (2) and solve for y:

6 + 2y = 14

2y = 8

y = 4

Why did I use eq. (2) to solve for y? Because it's less work. I could have used eq. (1) instead:

2(6) - 6y = -12

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-6y = -24

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More than one way to solve.

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3 years ago
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