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2 years ago

Find the solution to the system of linear equations.

Mathematics

1 answer:

natali 33 [55]2 years ago

6 0

Answer:

x = -1 y = 2

Step-by-step explanation:

Notice that the coefficients of x are opposites of each other. That makes the problem so much easier to solve. All you have to do is add the two equations and the x terms will be eliminated.

2x - 4y = -10

-2x - y = 0

- 5y = -10

y = 2 Substitute y = 2 into the first equation. 2x - 4(2) = -10

2x - 8 = -10

2x = -2

x = -1

It is always a good idea to check your results into the equations to see if they satisfy the equations.

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Write a division problem whose quotient has its first digit in the hundreds place

Margaret [11]

Quotient is another name for the answer to a division problem

the hundreds place is the 3rd number before the decimal, 9999999.0
^this one

so you need to find a division problem that equals something between 100 and 999

1000 divided by 10 is a good one, the answer to that problem is 100, and 100 has its first digit in the hundreds place.

8 0

2 years ago

Solve the equation 50=4(x-7)-6(3x-6)

rusak2 [61]

we are given

$50=4(x-7)-6(3x-6)$

Firstly , we can distribute

$50=4x-28-18x+36$

now, we can combine like terms

$50=-14x+8$

$-14x=42$

now, we can solve for x

and we get

$x=-3$ ...........Answer

3 0

3 years ago

Read 2 more answers

A square room has a tiled floor with 81 square tiles. How many tiles are along an edge of the room?

Strike441 [17]

As there are 81 tiles total, that makes your area 81. Being a square, that makes your area equation A=s^2. As you need a side, this makes your equation s=√A. Plugging in 81 as A, we get s=√81=9, so an edge has 9 tiles.

4 0

3 years ago

What is the answer for this please 23÷23

baherus [9]

Answer:

Step-by-step explanation:

Any number divided by itself equals 1. So, 23 divided by 23 is 1.

8 0

1 year ago

Fast-food restaurants spend quite a bit of time studying the amount of time cars spend in their drive-throughs. Certainly, the f

melisa1 [442]

Answer:

For the 99th percentile, we have X = 206 seconds.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 138.5, \sigma = 29$