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3 years ago

Free Response - calculator may be used. Please help 50 points and brainliest

Mathematics

2 answers:

Naily [24]3 years ago

5 0

Answer:

the answer would most likely be A

Step-by-step explanation:

Ann [662]3 years ago

3 0

Answer:

None of the expressions are equivalent, but there may be a typo. I that is the case, the first answer is most likely correct(it should be 3x²+x-4).

Step-by-step explanation:

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Please Help! Shouldn't be that hard.

AysviL [449]

The answer is a 1:3 and b 2:3

5 0

3 years ago

If (-1,4) and (3,-2) are end points of diameter of the circle, then the equation of the circle is

Volgvan

Answer:

If you've more doubts you can ask :)

Step-by-step explanation:

If the centre of a circle is (a, b) and radius r, then the equation of the circle is :

$(x - x)^2 + (y-b)^2 = r^2$

First we will find the centre, (a , b):

$a = \frac{3+(-1)}{2} = \frac{2}{2} = 1\\\\b = \frac{-2 + 4}{2} = \frac{2}{2} = 1$

Find radius:

$Radius, r = \frac{Diameter}{2}$

Diameter is the distance between (-1, 4) and (3, -2)

$diameter = \sqrt{(x_2 - x_1)^2 +(y_2-y_1)^2} \\\\$

$= \sqrt{(3-(-1)^2 + (-2-4)^2} \\\\=\sqrt{16 + 36}\\\\=\sqrt{52}\\\\=\sqrt{4 \times 13}\\\\=2\sqrt{13} \ units$

Therefore , $r = \frac{2 \times \sqrt{13} }{2} = \sqrt{13} \ units$

Equation of the circle is :

$(x - 1)^2 +(y-1)^2 = 13$

4 0

3 years ago

What is the selling price of an item if the original cost is $784.50 and the markup on the item is 6.5 percent?

Airida [17]

784.5+(784.5×0.065)
=784.5+50.9925==835.4925 round the answer=835.5

3 0

3 years ago

Gina has been present at school for 40 of the first 45 days of the school year. The school year is 180 days long. If Gina contin

guapka [62]

The answer is going to be 160.

6 0

3 years ago

Read 2 more answers

377. Dawn wants to compare the volume of a basketball with the

olchik [2.2K]

Answer:

$V = \frac{4}{3} \pi R^{3}$ and

$v = \frac{4}{3} \pi r^{3}$

Step-by-step explanation:

Dawn wants to compare the volume of a basketball with the volume of a tennis ball.

Now, if the radius of the basketball is R and that of the tennis ball is r, then the formula that can be used to determine the volume of each ball will be

$V = \frac{4}{3} \pi R^{3}$ and

$v = \frac{4}{3} \pi r^{3}$

Now, dividing V by v we can compare the volume of the basketball and the tennis ball. (Answer)

3 0

4 years ago