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vichka [17]
4 years ago
9

Solve for r whats the answer

Mathematics
2 answers:
NARA [144]4 years ago
7 0
(9r-18)/2 < 45
9r-18< 90
9r< 108
r < 12
tankabanditka [31]4 years ago
5 0
R=12 because in order to get rid of the 2 in the denominator you have to multiply both sides by 2. Then the equation reads 9r-18<90. Next add the 18 to her 9r<108. And lastly divide by 9 to solve for r. Which in this case is 12
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<u>Answer:</u>

y = -\frac{2}{3}x + 490

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<u>Step-by-step explanation:</u>

• The slope-intercept form of an equation takes the general form:

\boxed{y = mx + c},

where:

m = slope,

c = y-intercept.

• We are given the equation:

2x + 3y = 1470

To change this into the slope-intercept form, we must make y the subject:

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⇒ y = -\frac{2}{3}x + \frac{1479}{3}        [divide both sides by 3]

⇒ y = -\frac{2}{3}x + 490

• Comparing this equation with the general form equation, we see that:

m = -\frac{2}{3}

c = 490.

This means that the gradient is \bf -\frac{2}{3}, and the y-intercept is \bf 490.

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Step-by-step explanation:

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Step-by-step explanation:

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  x = -b±\frac{\sqrt{b^2 -4ac } }{2a}    

  x = 3 ± \sqrt{9+40} /2a  

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B)  The graph vertex of the graph of f(x)  is going to be at a minimum because the leading coefficient of the function has a positive integer which means the parabola will open up and its vertex will be at the minimum point.

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C)   First  I will graph the vertex and then graph he two x intercepts and connect then like a U shape.

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