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For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

2x + y = 8
-x - y = -5

8 + 2x

8 - 2x

-8 - 2x

-8 + 2x

Which point lies in the solution set for the following system of inequalities?

2x + y > 8
x - y < 2

(1, 1)

(3, 4)

(5, -2)

(6, 1)

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What Is This In Scientific Notation ?
0.000000000891

please&thanks:]

Sorry, I could not read the content fromt this page.

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In order to figure out how much more a large pizza costs than a small pizza, you can simply subtract the price of a small pizza from a large pizza, which will give you the answer of £1.90.

8.40 - 6.50 = 1.90

Good luck and I hope I helped you!

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1) you can subtract 3y from both sides in the first equation to get....

x = 23 - 3y

plug this into the second equation to get...

3 (23 - 3y) - 2y = 3
69 - 9y - 2y = 3
11 y = 66
y = 6

plug this into either equation to find x.

x + 3(6) = 23
x = 5

2) what you are going to substitute will be very easy as the first equation is very straight forward. multiply each side of the first equation to get y = 5x (for easier calculations), then plug it into the second equation to get...

3x + 2(5x) = 26
13 x = 26
x = 2

plug in this value in either equation to find y

2 = y/5
y = 10

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1. Write an equation, in point-slope form, of the line with a slope of 2 and containing the point (5, -2).

A.

y + 2 = 2(x - 5)

B.

y - 2 = 2(x + 5)

C.

y - 5 = 2(x + 2)

2. Find the equation of a vertical line through the point (-1, 6).

A.

x = 6

B.

x = -1

C.

y = 6

D.

y = -1

3. Find the equation of a line through the points (1, 3) and (6, -7). Express the equation in slope-intercept form.

A.

y = 2x + 1

B.

y = -2x + 5

C.

y = -2x + 7

4. Find the equation of the line that is perpendicular to y = 5 that goes through the point (-3, 2).

A.

y = -1

B.

y = 2

C.

x = 5

D.

x = -3

5. Write the equation of the line with a slope of -2 and goes through the point (-1, 6). Express the equation in standard form.

A.

2x + y = -7

B.

2x + y = -11

C.

2x + y = 4

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Home >All Categories > Science & Mathematics >Mathematics >Open Question Aswad Member since:March 15, 2011Total points:80 (Level 1)the average number of calories in a chocolate bar is 225. suppose that the
distribution of calories is approximately normal with variance=10. find the
probability that a randomly selected chocolate bar will have :
1. between 200 and 220 calories
2. less than 200 caloriesAnswer Question

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