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3 years ago

Find the accelartion:

1 answer:

6 0

A. Man runs (> 2.2 m/s is running) uphill at 6 m/s (???) and decelerates to walking at 2.0 m/s near the top, all in 5 minutes, assuming he ran in a straight line.

Acceleration is (final velocity-initial velocity (m/s) )/time (s)
=(2-6)/(5*60)=-4/300= -0.0133 m/s^2

B. Car goes east for 300 km in 45 min.
Velocity
=300*1000 m / (45*60) s due east
=300000/2700 m/s due east
=111.1 m/s due east
(is it an airplane? A cesna cruises at 63 m/s (226 km/h) )

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Solve the following system of equations. What is one x-value of a solution?

gulaghasi [49]

Answer:

There is some mistake in the question, because the solutions are x = -1.445 and x = -34.555

Step-by-step explanation:

Given the functions:

f(x) = x² + 4x + 10

g(x) = -32x - 40

we want to find the points at which f(x) = g(x).

x² + 4x + 10 = -32x - 40

x² + 4x + 10 + 32x + 40 = 0

x² + 36x + 50 = 0

Using quadratic formula:

$x = \frac{-b \pm \sqrt{b^2-4(a)(c)}}{2(a)}$

$x = \frac{-36 \pm \sqrt{36^2-4(1)(50)}}{2(1)}$

$x = \frac{-36 \pm 33.11}{2}$

$x_1 = \frac{-36 + 33.11}{2}$

$x_1 = -1.445$

$x_2 = \frac{-36 - 33.11}{2}$

$x_2 = -34.555$

5 0

3 years ago

Alice earned some money over the summer. She charged $11 per hour to baby-sit and $7.50 per hour to mow lawns. She baby-sat for

Ronch [10]

(11 * 25) + (7.5 * 19) =

$417.50

5 0

3 years ago

Read 2 more answers

57 plus what equals 100

netineya [11]

Answer: 43

Step-by-step explanation:

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3 years ago

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Which is a correct definition of perpendicular lines?

djyliett [7]

It would be B: a set of points that extends infinitely in two directions

4 0

3 years ago

CAN SOMEONE HELP .. WITH THE RIGHT ASWER PLZZ...

Ksenya-84 [330]

B. Add -12x to both sides. Then divide all terms by -2. The positive 12 on the right side will be a -6 and the -42 will be a positive 21. The inequality sign is always switched whenever the equation is divided by a negative number.

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3 years ago