4 years ago

25 POINTS ---need an explanation

1 answer:

7 0

I suggest you look at the work in the pictures I attached. It examplains how you work out the problem and what the answer is

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2. A man drove 240 miles south at the rate of 60 miles per hour. On the return trip, he drove the rate of 40 miles per hour. The

shutvik [7]

$av = \frac{v_{2} - v_{1}}{t_{2} - t_{1}}$

$t_{1} = \frac{d}{v_{1}} = \frac{240}{60} = 4 \: hours \\ t_{2} = \frac{d}{v_{2}} = \frac{240}{40} = 6 \: hours$

$av = \frac{v_{2} - v_{1}}{t_{2} - t_{1}} = \frac{40 - 60}{6 - 4} = \frac{ - 20}{2} = - 10$

$av \: speed= 10 \\ av \: velocity = - 10 \: \: north$

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2 years ago

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What is an equation of the line that passes through the points (6, 4) and (4,1)?

netineya [11]

Answer:

3/2 x-5

Step-by-step explanation:

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3 years ago

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Can anyone help. Greatly appreciate:)

PilotLPTM [1.2K]

Answer:

Area= 12 units squared, Perimeter= 16.12899

Step-by-step explanation:

$AC= \sqrt{(4-0)^{2}+ (0+4)^{2}} = 4\sqrt{2}$

$AB= \sqrt{(0-4)^{2}+ (2-0)^{2} } = 2\sqrt{5}$

$BC= \sqrt{(0-0)^{2}+ (2+4)^{2} }= 6$

So, perimeter= $4\sqrt{2} + 2\sqrt{5} +6= 16.12899$

$Area= \frac{1}{2}bh\\$

$= \frac{1}{2}BC\sqrt{(4-0)^{2}+(0-0)^{2} }$

$= 12$ $units^{2}$

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3 years ago

A circle has a center at (4, -7) and a radius of 4 units.

elena-s [515]

Answer:

The third one

Step-by-step explanation:

The equation for a circle is $(x-h)^{2} +(y-k)^{2} =r^{2}$

(h, k) is the center

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3 years ago

Factor the common factor out of 8x^3+12x

Agata [3.3K]

The answer is, 4x(2x^2+3)

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4 years ago

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