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1. Graph the equation y 4. 2. Find the y-intercept and the

Resolved Question:

1. Graph the equation y=4. 2. Find the y-intercept and the x-intercept for the equation 3x+5y=45. 3. Solve using the miltiplication principle -6x>1/13. 4. Find the y-intercept and the x-intercept for 6x-5y=20. 5. Solve using the addition and multiplication principles 2.4x+19.2>48.0-7.2x. 6. Graph the line containing the given pair of points and find slope. (-3,4) (2,1)
Submitted: 8 years ago.
Category: Math Homework
Expert:  jeto01 replied 8 years ago.
2.4x+19.2>48.0-7.2x. can you please clarify the bold portion ?
Expert:  jeto01 replied 8 years ago.
I think I got it!
Customer: replied 8 years ago.
48.0 minus 7.2x This is the way it is written in the book... 2.4x + 19.2 > 48.0 - 7.2x

Ok
Expert:  jeto01 replied 8 years ago.
1.graphic
At y = 4.2, just draw a horizontal line

2. 3x + 5x = 45
x-intercept is found when y = 0
if y = 0, 3x+ 5*0 = 45 or 3x = 45
when 3x = 45,
x = 15. So x-intercept is (15, 0)
y-intercept is found when x = 0
if x= 0, 3*0 + 5*y = 45
5y = 45
y = 9, So, y-intercept is (0,9)


3.

-6x > 1/13 divide both sides by -6
(-6/-6)x < (1/13)/-6 Note that the direction of the sign (>) becomes (<). Always do that when dividing or multiplying by a negative number

x < 1/13 * 1/-6
x< 1/-78
x< -1/78

4.
6x-5y=20

When x = 0
-5y = 20
y = -4
y-intercept is (0, -4)

When y = 0
6x = 20
x = 20/6 = 3.3333
x-intercept is (3.333, 0)

5.
2.4x+19.2>48.0-7.2x
add 7.2x to both sides
2.4x+7.2x + 19.2 > 48.0
9.6x + 19.2 >48.0
subtract 19.2 from both sides

9.6x > 48.0 - 19.2
9.6x > 28.8
Divide both sides by 9.6
we get x > 3

6.

graphic




slope = m = (y1 -y2)/(x1-x2) = (4-1)/(-3-2) = 3/-5 = -3/5


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