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MariettaO [177]
4 years ago
5

30 POINTS!

Mathematics
1 answer:
Luba_88 [7]4 years ago
6 0

Answer: 5.5 seconds

Since the penny is dropped and not thrown, the initial velocity is 0 and the initial height is given as 150m. Plugging these into the given equation result in -4.9t^2+0t+150=-4.9t^2+150. To find how long it will take for the penny to hit the ground we set the equation equal to zero and solve for t. Since this doesn't factor, you'll need to use the quadratic formula:

+/-\frac{\sqrt{0^2-4(-49)(150)}}{2(-49)} =+/-\frac{10\sqrt{15} }{7}=+/-5.533. Since time cannot be negative, the answer will be the positive 5.5 seconds.

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schepotkina [342]
Put the points on the coordinate plane
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3 years ago
Question 16
anastassius [24]

Step-by-step explanation:

Distance between 2 towns 360 miles showed length 3 inches

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3 0
3 years ago
What is the factored expression of 56n - 70?
mart [117]

Answer:

14(4n - 5)

Step-by-step explanation:

The GCF of 56 and 70 is 14

56/14 = 4

70/14 = 5

Place the GCF outside the parenthesis

14(

and keep the n on 56 and put it on 14, = 14n,

14(4n

then keep the subtraction sign and 5 and put it in the parenthesis

14(4n - 5)

i hope that maked sense and helped you! (and could i have brainliest if possible it would really help me!)

5 0
3 years ago
At Greenwood Landscaping, rock costs $47.50 per ton. How much would 2.5 tons cost?
Alecsey [184]
Oh boy, well looking in perspective 47.50 per ton
there are 2.5 tons. Lets break this down:
2 and half tons
2 x 47.50= N
Noted after using our trusty calculator you'll get 95
2 x 47.50= 95
then you have that half
which would look like this :  2/47.50
Divide 47.50 by 2 (Because a half is .5 or 1/2 of the whole number in this case 47.50)
2/47.50 =23.75
Next add up your two new answers 23.75 + 95 = ?
Hope this helps.
7 0
3 years ago
The difference between two numbers is 9<br>Find these numbers if their sum is 45.​
kirill115 [55]

Answer:

spoe that x and y are the two numbers. Then we have x-y=9 and x+y=45. By adding the two equations together we obtain 2x=54 and so x=27. This implies that y=45-27=18.

6 0
3 years ago
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