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mrs_skeptik [129]
3 years ago
7

Number (C) what’s the equation?

Mathematics
2 answers:
Fynjy0 [20]3 years ago
6 0

Answer:

y = 2/3x - 2.

Step-by-step explanation:

Check to see if its a straight line graph'

The slope  = (2-0)/ 6-3) = 2/3.

(0--2)/ 3-0) = 2/3

(2 - -6) / 6 - -6) = 8/12 = 2/3

So it looks like  a straight line.

So we can write it as

y = 2/3 x + c

When  x = 3, y = 0

0 = 2/3 * 3 + c

c = 0 -  2 = -2

The equation is y = 2/3x - 2.

nataly862011 [7]3 years ago
3 0

Answer:

y=\frac{2}{3} x-2

Step-by-step explanation:

use substitution method

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Answer:

The two numbers are .8*160=128 and .85*240=204

Step-by-step explanation:

First sentence:                 x+y=400

Second sentence           .8x+.85y=400-68

Solve y in the first sentence:  y=400-x

Plug first into second:     .8x+.85(400-x)=332

Distribute:                        .8x+.85(400)-.85x=332

Combine like terms:        -.05x+.85(400)=332

Simplify(multiply):              -.05x+      340=332

Subtract 340 on both sides:    -.05x       =332-340

Simplify(subtract):                     -.05x        =-8

Divide both sides by -.05:              x        =-8/-.05

Simplify (division):                           x        = 160

So y=400-x=400-160=240

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3 years ago
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

To Find:

If discriminant (b^2 -4ac>0) how many real solutions

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Consider a Quadratic Equation in General Form as

ax^{2} +bx+c=0

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b^{2} -4ac is called as Discriminant.

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If Discriminant,b^{2} -4ac >0

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If Discriminant,b^{2} -4ac < 0

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If Discriminant,b^{2} -4ac=0

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