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2 years ago

7

The invention of the telegraph ______________ a. let distant locations communicate quickly. b. kept distant locations from commu

nicating quickly. c. was 50 years after the railroad. d. was 50 years before the railroad.

1 answer:

VashaNatasha [74]2 years ago

5 0

The answer is a.......

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Graph the linear equation and answer each of the following questions. y=-2x-3

ollegr [7]

Answer:

Part 1) The y-intercept is the point (0,-3)

Part 2) The slope in fraction form is $m=-\frac{2}{1}$

Part 3) The graph in the attached figure

Step-by-step explanation:

we have

$y=-2x-3$

Part 1) What is the y-intercept?

Remember that

The y-intercept is the value of y when the value of x is equal to zero

so

For x=0

substitute in the linear equation and solve for y

$y=-2(0)-3\\y=-3$

The y-intercept is the point (0,-3)

Part 2) What is the slope (in fraction form)?

we have

$y=-2x-3$

This is the equation of the line in slope intercept form

$y=mx+b$

where

m is the slope or unit rate

b is the y-intercept

so

$m=-2$

In fraction form is

$m=-\frac{2}{1}$

The slope is negative, that means, is a decreasing function (as the x-values increases the y-values decreases)

Part 3) Graph the line

To graph the line we need two points

From the y-intercept (0,-3) use the slope to find your next point

The slope is -2, so you will rise -2 (2 units down) and run 1 (1 unit to the right).

The next point is (0+1,-3-2) -----> (1,-5)

so

Plot the points (0,-3) and (1,-5), connect them and graph the line

The graph in the attached figure

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3 years ago

Explain how you can use the basic moves of algebra to transform the equation 5x-3y=12 into 0=12-5x+3y

ozzi

Subtract 5x and add 3y from the left side so that it can be moved to the right side. This will allow you to solve and get the second equation.

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3 years ago

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Does a triangle equal to 180° or 360°?

Advocard [28]

180 degrees. in an equilateral triangle, each angle is 60 degrees

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2 years ago

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You buy a storage rack that holds 40 CDs you have 27 CDs write an inequalityt that describes how many more cds you can buy and s

MAVERICK [17]

<span>CD's must be 40 or below, so CD's total≤ 40
If you already have 27, than 27+(number of CDs bought)</span><span>≤ 40
27+x=40(max)
x=(40-27)
x=13 CDs can be bought, at maximum
so (CDs purchased)</span><span> ≤ 13
Therefore, 15 CDs would be too many to fit in the rack </span>

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2 years ago

Expand 8x - 2x + 3(-4x+9)

stiks02 [169]

Answer:

4

Step-by-step explanation:

Always do parentheses first!

-4x+9=-5x

8x-2x=6x

-5x-6x+3=

x+3=4

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3 years ago

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