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3 years ago

Please help me out as soon as possible!!

Mathematics

1 answer:

egoroff_w [7]3 years ago

7 0

Answer:

Step-by-step explanation:

The numbers inside are the difference between the numbers outside.

Look at the left figure.

6 = 10 - 4

8 = 18 - 10

14 = 18 - 4

Look at the middle figure to confirm this also works there.

Now apply it to the right figure.

? = 15 - 5

? = 10

Answer: (C) 10

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Which of the following points is a solution to the system of equations x - y = 1 and -x + 3y = - 7?

kiruha [24]

Answer:

(-2,-3)

Step-by-step explanation:

Put the equations over each other.

$\binom{x - y = 1}{ - x + 3y = - 7 }$

Subtract the x values.

$\binom{ - y = 1}{3y = - 7}$

Subtract on both sides.

$2y = - 6$

Divide on both sides.

$y = - 3$

Insert the y value into one of the equations.

$x - ( - 3) = 1$

Get rid of the parenthesis.

$x + 3 = 1$

Subtract on both sides.

$x = - 2$

You could also individually plug in each solution into both equations to see if they are true.

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2 years ago

An urn contains 2 red marbles and 3 blue marbles. 1. One person takes two marbles at random from the urn and does not replace th

Ghella [55]

Answer:

A) The best way to picture this problem is with a probability tree, with two steps.

The first branch, the person can choose red or blue, being 2 out of five (2/5) the chances of picking a red marble and 3 out of 5 of picking a blue one.

The probabilities of the second pick depends on the first pick, because it only can choose of what it is left in the urn.

If the first pick was red marble, the probabilities of picking a red marble are 1 out of 4 (what is left of red marble out of the total marble left int the urn) and 3 out of 4 for the blue marble.

If the first pick was the blue marble, there is 2/4 of chances of picking red and 2/4 of picking blue.

B) So a person can have a red marble and a blue marble in two ways:

1) Picking the red first and the blue last

2) Picking the blue first and the red last

C) P(R&B) = 3/5 = 60%

Step-by-step explanation:

C) P(R&B) = P(RB) + P(BR) = (2/5)*(3/4) + (3/5)*(2/4) = 3/10 + 3/10 = 3/5

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3 years ago

3 tools federal reserve use to enact monetary policies

Vinil7 [7]

The three important tools of Federal Reserve's monetary policies are as follows:

open market operations
the discount rate
reserve requirements.

Step-by-step explanation:

The monetary policies of the United States's central bank, Federal Reserve are the acts of the entity to influence money and raise the country's economy. These policies also helps in looking over the aspects of how the money and credits draw affects on credit rates and the overall performance of the U.S. Economy.

The three prime tools of the Federal reserve's monetary policies are the Open Market Operations, Discount Rates and the Reserve Requirements.

Open Market operations

This involves in purchase and selling process of government securities. The primary dealer with which the Reserve deals compete on the basis of prices and thus the dealer gets decided with whom the reserve deal for the day.

Discount Rates

This is the discount rate charged to depository institutions for short term loans by the Federal Reserve.

Reserve Requirements

This is the money or deposit amount the Reserve Bank must sustain in its vault or depository.

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3 years ago

What is the solution of the equation 3/4x+5=-9

riadik2000 [5.3K]

Answer:

x=10.5

Step-by-step explanation:

3/4x=-14

x=10.5

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4 years ago

15y + 5 = 10 Plss need help it’s solving equations

beks73 [17]

Answer:

The value of y will be 1/3.

Step-by-step explanation:

First take +5 to the right side of the equation and subtract from 10. Then divide the answer by 15 by taking the 15 multiplied to y to the right side.

If it was helpful plz like n follow.

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3 years ago