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andrezito [222]
3 years ago
12

A researcher observes and records the height of a weight moving up and down on the end of a spring. At the beginning of the obse

rvation the weight was at its highest point. From its resting position, it takes 20 seconds for the weight to reach its highest position, fall to its lowest position, and return to its resting position. The difference between the lowest and the highest points is 6 in. Assume the resting position is at y = 0.
Mathematics
1 answer:
andreev551 [17]3 years ago
8 0

i have a easy way but u cant do it it needed 2 pages

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Can someone explain how to solve this?
BigorU [14]

Answer:

b

Step-by-step explanation:


8 0
3 years ago
2x^2+9x=-7 <br> Solve round to nearest tenth
Drupady [299]

Answer:

  x = -3.5 or -1

Step-by-step explanation:

Add 7 and factor.

  2x^2 +9x +7 = 0

  (2x +7)(x +1) = 0

  x = -3.5   or   x = -1 . . . . . values that make the factors zero

_____

<em>Comment on factoring</em>

Factoring ax^2 +bx +c = 0 requires you find factors of ac that have a sum of b. Here, you're looking for factors of 2·7 = 14 that have a sum of 9. If you're observant, you realize that 2+7=9, so 2 and 7 are the factors you want.

Now, you can write the factored form as ...

  (ax +p)(ax +q)/a = 0 . . . . where p and q are the factors of ac we just found

The divisor "a" is used to simplify one or both of the factors. Here, we have ...

  (2x +2)(2x +7)/2 = 0

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4 0
3 years ago
Elena harvested 75 kg of apples last autumn. This autumn, her harvest increased by 24%. How many kilograms of apples did she har
sergejj [24]
She harvested 93 kg of apples.

First you need to set it up like this:
X/75=24/100

Then you cross multiply and get:
1800=100x

The you isolate the variable (divide both sides) and get 18

75+18=93

8 0
3 years ago
- 10p+8=7p+12 what is the answer
Tresset [83]
-10p+8=7p+12
8=17p+12
-4=17p
-4.25=p
5 0
3 years ago
6x-2y=10 and 6x+3y=15
Gnesinka [82]

Answer:

x = 2 ; y =1

Step-by-step explanation:

6x-2y=10  -----------------(i)

6x+3y=15  -------------(ii)

multiply (i) by (-1)

(i)* (-1)      -6x + 2y = -10

(ii)            <u>  6x + 3y = 15</u>

add,                  5y = 5

                           y= 5/5

                          y = 1

Put y = 1 in (i)

              6x - 2*1 = 10

                6x - 2  = 10

                      6x = 10 + 2

                      6x = 12

                       x = 12/6

x = 2

3 0
3 years ago
Read 2 more answers
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