3 years ago

I need help with these three questions

Mathematics

1 answer:

dusya [7]3 years ago

3 0

0.55 per pound
90 miles per day
16 oz for 3.19

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Harry's school is selling t-shirts to raise money for the archery team. The school will receive 35% of the total sales which can

avanturin [10]

The marching l meaning of the X intercept is when the school receives $0

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3 years ago

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Find the x-intercept of the parabola with vertex (1,-13) and y-intercept (0,-11).

Advocard [28]

1. find equation

general solutions are:
$y = a x^{2} +bx +c \\ \\ \frac{dy}{dx} = 2ax +b$

for P(0,-11)

$-11 = 0a + 0b +c$ ⇒ $c = -11$

for p(1,-13)
$-13 = 1a + 1b -11 \\ a+b = -2$

and

$0 = 2a + b \\ b = -2a$

solve for a and b:
$a - 2a = -2 \\ a = 2 \\ b = -4$

the total equation is now:

$y = 2 x^{2} -4x -11$

To find the x-intercept set y=0 and solve for x

$0 = 2 x^{2} -4x-11$

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3 years ago

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Two perpendicular lines intersect at the origin. If the slope of the first line is .5, what is the equation of the second line?.

Sedaia [141]

The origin is at the point (0,0). Therefore, the y-intercept will be 0. For two points to be perpendicular, the slopes must be opposite reciprocals of each other. .5 can be seen as 1/2, so the reciprocal is 2, and it is positive, making that 2 negative. Your equation would be y = -2x.

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3 years ago

PLEASE HELP FAST!!!

Rus_ich [418]

$\\ \sf\longmapsto 3s-5+2s+25=170$