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Nat2105 [25]
3 years ago
12

Using the x,y format where does the graph of 3x+3 and -5×+7 intersect

Mathematics
2 answers:
IRINA_888 [86]3 years ago
8 0
Not sure if I'm right but I believe they intersect at (1,4).
denis-greek [22]3 years ago
5 0
Assuming they equal y

y=3x+3
y=-5x+7
set eqal to each other since both equal y
3x+3=-5x+7
add 5x both sides
8x+3=7
minus 3 both sides
8x=4
divide by 8 both sides
x=1/2
sub back

3x+3=y
3(1/2)+3=y
1.5+3=y
4.5=y
9/2=y

x=1/2
y=9/2
(1/2,9/2) is soltuion
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Step-by-step explanation:

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Answer:

y=-4x+16.

Step-by-step explanation:

From the given graph it is clear that the y-intercept is 16.

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y=mx+b

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y=-4x+16

Therefore, the required equation is y=-4x+16.

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3 years ago
A paper company needs to ship paper to a large printing business. The paper will be
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Answer:

x = 8

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Step-by-step explanation:

Total small box weight  = 50x    [x being the number of small boxes]

Total large box weight = 80y     [y being the number of large boxes]      

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Total weight = 1280

<em>Determine x and y.</em>

<u>You know 2 equations. One for weight and another for number of boxes each.</u>

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  • x+y = 19

<u>Rewrite second equation:</u>

x+y=19

y=19-x

<u>You have to plug in one into another.</u>

1280 = 50x + 80(19-x)

<u>Solve for x</u>

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2 years ago
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Vesnalui [34]

Answer:

y=5/3x-3

Step-by-step explanation:

first, let's put 3x+5y=15 into y=mx+b form

move 3x to the other side

5y=-3x+15

divide by 5

y=-3/5x+3

now, perendicular lines have slopes that are negative and reciprocal.

With our new equation we can automatically find the slope, which would be 5/3.

now, we need to find b

plug the points (3,2) into y=5/3x+b

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so that means that our equation will now be

y=5/3x-3.

Hope this helps!

6 0
3 years ago
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