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3 years ago

Bob needs one hour to roke the leaves, It takes George 1/2 an hour to do 1

Mathematics

1 answer:

Mandarinka [93]3 years ago

7 0

Step-by-step explanation:

30 minutes because you can just subtract Geoge's time

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Bob is three times as old as Mary. Four years from now, Bobwill be only twice as old as Mary. Find their present ages.

wolverine [178]

Bob is 12.
Mary is 4.
12+4 = 16.
4+4 = 8.
16/2 = 8.

8 0

4 years ago

Which are perfect squares

Sonbull [250]

Answer:

Numbers that when square rooted give whole numbers

Step-by-step explanation:

E.g. 1,4,9,16,25, and so on.

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4 years ago

Consider the three points (-7,-7), (21,14), (49,35)

kykrilka [37]

E is the correct answer

6 0

4 years ago

A parabola can be drawn given a focus of (8, 6) and a directrix of x=4 Write the equation of the parabola in any form. Answer:

Alexeev081 [22]

Answer:

The equation of the parabola in vertex form is $x-6 = \frac{1}{16}\cdot (y-6)^{2}$ .

Step-by-step explanation:

Since the directrix is of the $x = a$ , then the equation of the parabola in vertex form is of the form:

$x-h = \frac{1}{4\cdot p}\cdot (y-k)^{2}$ (1)

Where:

$x$ - Dependent variable.

$y$ - Independent variable.

$p$ - Least distance between focus and directrix.

$h$ , $k$ - Coordinate of the vertex.

The least distance between focus and directrix is determined by Pythagorean Theorem:

$p = \sqrt{(8-4)^{2}+(6-6)^{2}}$

$p = 4$

Now, we determine the location of the vertex by the following vectorial formula:

$(h,k) = F(x,y) - (0.5\cdot p, 0)$ (2)

If we know that $p = 4$ and $F(x,y) = (8,6)$ , then the location of the vertex is:

$(h,k) = (8,6) -(2, 0)$

$(h,k) = (6,6)$

And the equation of the parabola in vertex form is $x-6 = \frac{1}{16}\cdot (y-6)^{2}$ .

5 0

3 years ago

Please help me

puteri [66]

I will rounded up too 45 right answer

3 0

3 years ago