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arsen [322]
2 years ago
5

Can anyone help me please

Mathematics
1 answer:
Nady [450]2 years ago
6 0

Yo sup??

since WY is the perpendicular bisector we can say

3x-5=2x+3

x=8

Hope this helps

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The deck of a bridge is suspended 275 feet above a river. If a pebble falls off the side of the bridge, the height, in feet, of
Ivenika [448]

Answer:

Our equation for the height is:

y(t) = 275 - 16*t^2.

a) To find the average velocity between two times, t1 and t2, (where t2 > t1) the equation is:

AV = \frac{y(t2) - y(t1)}{t2 - t1}

Then:

i) t1 = 4s, t2 = 4s + 0.1s = 4.1s

The average velocity is:

AV = \frac{(275 - 16*4.1^2) - (275 - 16*4^2)}{4.1 - 4} = \frac{16(4^2 - 4.1^2)}{0.1} = -129.6

And the units will be ft/s, so the average speed is:

-129.6 ft/s

The minus sign is because te pebble is falling down.

ii)  t1 = 4s, t2 = 4s + 0.05s = 4.05s

The average velocity is:

AV = \frac{(275 - 16*4.05^2) - (275 - 16*4^2)}{4.05 - 4} = \frac{16(4^2 - 4.05^2)}{0.05} = -128.8

So the average speed is -128.9 ft/s

iii)  t1 = 4s, t2 = 4s + 0.01s = 4.01s

The average speed is:

AV = \frac{(275 - 16*4.01^2) - (275 - 16*4^2)}{4.01 - 4} = \frac{16(4^2 - 4.01^2)}{0.01} = -128.16

The average speed is -128.16 ft/s.

b) The instantaneous velocity of the pebble after 4 seconds can be obtained by looking at the velocity equation, that is the derivative of the height equation.

v(t) = dy(t)/dt.

v(t) = -2*16*t + 0

Then the velocity at t = 4s is:

v(4s) = -32*4 = -128

The instantaneous velocity at t = 4s is -128 ft/s.

3 0
3 years ago
The length of a rectangular parking lot is 32 meters and the width is 20 meters. The parking lot is surrounded by a sidewalk tha
Nastasia [14]
The expression is:
32 X 20 + x

Hope that will help :)
4 0
2 years ago
A fair coin is tossed 5 times in a row. The exact probability of the coin landing heads exactly 2 times is?
OLga [1]

|\Omega|=2^5=32\\|A|=10\\\\P(A)=\dfrac{10}{32}=\dfrac{5}{16}

5 0
3 years ago
mia is 6973920 minutes old. convert her age to years days and months assuming that a year has 365 days and a month has 30 days
svp [43]

Answer:

6973920 is equal to 159.2 months

159.2 months is equal to 13.26 years

.26 of a year is 3 months

Mia is 13 years 3 months old

Step-by-step explanation:


4 0
2 years ago
Read 2 more answers
This is a question I need help on. Please! 15 points!
Kitty [74]

Answer:

a

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
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