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3 years ago

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Debbie studies for 12.5 hours, John studies for 6 hours, and Ashley studies for 1.5 hours. what is the average number of hours t

he 3 students study?

1 answer:

ale4655 [162]3 years ago

6 0

you can answer it six point six six six six six infinity or you can answer it 6.7 depending upon how they want

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There are 604 students and teachers going on a field trip. A school bus holds 78 people. How many buses are needed for the field

Tasya [4]

Answer: 8 buses

Step-by-step explanation:

You need 8 buses minimum

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3 years ago

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Determine whether ABCD is a parallelogram The vertices are A(-2,3) , B(3,2), C(2,-1) and D(-3,0)

iogann1982 [59]

Answer:

Yes, this is a parallelogram

Step-by-step explanation:

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3 years ago

Help me please!! <br> Also explain you answer since this is a study guide for a important test!!

il63 [147K]

Answer:

<h3><em>the </em><em>answer</em><em> </em><em>is </em><em>A</em></h3>

Step-by-step explanation:

8x+6is equivalent to-7(1-x)+x+13 because

-7(1-x)+x+13

we use-7to multiply the numbers in the bracket which is equal to -7+7x(minus ❌times minus =+)

-7+7x+x+13

collect like terms

7x+x+13-7=8x+6

answer is A

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3 years ago

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A parabola can be represented by the equation x2 = -20y.

aliya0001 [1]

Answer:

$\mathrm{Parabola\:focus\:given}\:x^2=-20y:\quad \left(0,\:-5\right)$

Step-by-step explanation:

Given the equation

$x2 = -20y$

A parabola is the locus of points such that the distance to a point the focus equals the distance to a line the directrix.

$4p\left(y-k\right)=\left(x-h\right)^2$ is the standard equation for an up-down facing parabola with vertex at (h, k), and a focal length |p|.

so

$x^2=-20y$

$\mathrm{Switch\:sides}$

$-20y=x^2$

$\mathrm{Factor\:}4$

$4\cdot \frac{-20}{4}y=x^2$

$4\left(-5\right)y=x^2$

$\mathrm{Rewrite\:as}$

$4\left(-5\right)\left(y-0\right)=\left(x-0\right)^2$

$\left(h,\:k\right)=\left(0,\:0\right),\:p=-5$

Parabola is symmetric around the y-axis and so the focus lies a distance\ p from the center (0, 0) along the y-axis.

$\left(0,\:0+p\right)$

$=\left(0,\:0+\left(-5\right)\right)$

$\mathrm{Refine}$

$\left(0,\:-5\right)$

Therefore,

$\mathrm{Parabola\:focus\:given}\:x^2=-20y:\quad \left(0,\:-5\right)$

Please check the attached figure too.

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3 years ago

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