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Ede4ka [16]
3 years ago
13

Help plssss i give brainliest

Mathematics
1 answer:
drek231 [11]3 years ago
6 0

Answer:

(7, - 2 )

Step-by-step explanation:

Given the 2 equations

x = - 3y + 1 → (1)

- 3x - 3y = - 15 → (2)

Substitute x = - 3y + 1 into (2)

- 3(- 3y + 1) - 3y = - 15 ← distribute and simplify left side

9y - 3 - 3y = - 15

6y - 3 = - 15 ( add 3 to both sides )

6y = - 12 ( divide both sides by 6 )

y = - 2

Substitute y = - 2 into (1) for corresponding value of x

x = - 3(- 2) + 1 = 6 + 1 = 7

solution is (7, - 2 )

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Option B

When you roll two number cubes, the odds in simplest form against getting two numbers greater than 3 is 1 : 4

<h3><u>Solution:</u></h3>

The probability of an event is given as:

\text {probability of an event }=\frac{\text { number of favorable outcomes }}{\text { total number of possible outcomes }}

Given that,

Tow number cubes are rolled

<em><u>To find: Probability of getting two numbers greater than 3</u></em>

On a number cube there are 6 numbers {1, 2, 3, 4, 5, 6} Out of which 3 numbers are greater than 3 {4, 5, 6}

So, total number of possible outcomes = 6

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When you roll one number cube, probability of getting number greater than 3:

\text { Probability (number greater than } 3 \text { ) }=\frac{3}{6}

<em><u>When you roll two number cubes, probabilty is given as:</u></em>

\text { Probability (number greater than }3)= \frac{3}{6} \times \frac{3}{6}=\frac{1}{2} \times \frac{1}{2} = \frac{1}{4}

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Option B is correct

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