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3 years ago

What’s the answer, I’m really confused

Mathematics

1 answer:

Ann [662]3 years ago

7 0

C! Look at the question again

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Consider the system of equations.

Paladinen [302]

Step-by-step explanation:

4x-9y=-9 1

2x +3y=3 2

1 - 2(2)

4x -9y=-9

(2)* -4x -6y=6

________

0-15y=-3

15y=3

y=3/15

y=1/5

6 0

2 years ago

Read 2 more answers

An urn contains 12 balls, of which 4 are white.

wel

Answer:

a) $\frac{1}{3}$

b) $\frac{4}{12}\,,\,\frac{4}{11}\,,\,\frac{4}{10}\,,...$

Step-by-step explanation:

Number of balls in the urn = 12

Number of white balls in the urn = 4

So, number of balls which are not white = 12 - 4 = 8

We know that probability = No. of outcomes/Total number of outcomes

Let $A_i\,,\,B_i\,,\,C_i$ denotes the event of getting white ball by A, B and C

a) each ball is replaced after being drawn.

Probability = Number of white balls/Total number of balls

Solution: $P(A_i)=P(B_i)=P(C_i)=\frac{4}{12}=\frac{1}{3}$

b)the balls that are withdrawn are not replaced.

Solution:

If A wins: $P(A_1)=\frac{4}{12}=\frac{1}{3}$

If A lost and B wins: $P\left ( B_1|A_1^{c} \right )=\frac{4}{11}$

If A and B lost and C wins: $P\left ( C_1|A_1^{c}\,B_1^{c} \right )=\frac{4}{10}$

and so on....

4 0

3 years ago

Is a rectangle a plane shape

Triss [41]

Answer:

A plane shape with four straight sides and four right angles for corners is called a rectangle.

Step-by-step explanation:

3 0

3 years ago

3w + 7=8 need help with this

LiRa [457]

Hope this helps you out 3w+7=8

The answer is w= 1/3

Step by step:

3w+7=8
Step 1: is subtract is 7 from both sides.
3w+7-7=8-7
3w=1

Step 2: Divide both sides by 3.
3w/3 = 1/3

Your solution is:

w=1/3

6 0

3 years ago

2Y=5XSquared<br> I don’t have the power symbols on my phone.<br> How do I solve for Y?

gizmo_the_mogwai [7]

Divide both sides by two.

6 0

3 years ago