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3 years ago

Y=2x-1 2x+y=3 how do i solve this substitution problem

Mathematics

1 answer:

nika2105 [10]3 years ago

8 0

Step-by-step explanation:

$y=2x-1 \: \: \: \: \: \: \: ..(1) \\ 2x+y=3 \: \: \: \: \: \: \:...(2) \: \: \: \: \: \: (given)$

put equation 1 in equation 2

$2x+2x - 1=3 \\ 4x = 4 \\ x = \frac{4}{4} = 1 \\ \\ x = 1 \\ \\$

$2(1)+y=3 \\ 2 + y = 3 \\ y = 3 - 2 \\ y = 1$

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I watched a video and didn't get my free answer, can I have some help,

vazorg [7]

Answer:

y + 13 = 5(x + 2)

Step-by-step explanation:

The slope-intercept form of the equation of a line is

y = mx + b,

where m = slope, and b = y-intercept.

From the slope-intercept equation y = 5x - 3, we see that the slope of the line is 3.

The point-slope form of the equation of a line is:

y - y1 = m(x - x1)

where m = slope, and (x1, y1) is a point on the line.

We have point (-2, -13), so x1 = -2, and y1 = -13.

We also have slope 5, so m = 5.

Now we use the coordinates of the given point and the slope in the point-slope equation.

y - (-13) = 5(x - (-2))

We simplify to get

y + 13 = 5(x + 2)

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3 years ago

A wall in Marcus's bedroom is 8 2/5 feet high and 16 2/3 feet long If he paints 1/2 of the wall blue, how many square feet will

Alja [10]

We can simplify across between the 5 and the 50 and also between the 42 and the 3.

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4 years ago

Read 2 more answers

What number should be added to both sides of the equation to complete the square x^2+3x=6

Allisa [31]

Take half of the coefficient of x: It is 3, and half that is 3/2.

Then <span>x^2+3x=6 becomes:

</span><span> x^2+3x + (3/2)^2 =6 + (3/2)^2, and

(x+3/2)^2 = 6 + 9/4

You were not asked to solve the equation, but why not do it for the practice?

</span>Solve (x+3/2)^2 = 6 + 9/4 for x. There will be 2 values.

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4 years ago

PLZZ answer this in a simple method

Tpy6a [65]

Answer:

hope this help you

of my handwriting is bad then sorry.

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3 years ago

10 normal six sided dice are thrown.Find the probability of obtaining at least 8 failuresif a success is 5 or 6.

erastova [34]

Answer:

0.2992 = 29.92% probability of obtaining at least 8 failures.

Step-by-step explanation:

For each dice, there are only two possible outcomes. Either a failure is obtained, or a success is obtained. Trials are independent, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$