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DerKrebs [107]
3 years ago
7

Three friends were eating chocolate chip cookies after school. Nacy ate four less than two times the amount of cookies that Kate

ate. Avery ate two times the amount of cookies that Nancy ate. If the girls ate a total of 16 cookies, how many did each girl eat?
Mathematics
1 answer:
galben [10]3 years ago
7 0
Let the number of cookies that kate eats be ‘n’
kate : n
nacy : 2n-4
avery : 2(2n-4)

n + 2n-4 + 2(2n+4) = 18
7n - 12 = 16
7n = 28
n = 4

kate : 4
nacy : 2x4 - 4 = 4
avery : 2(2x4 - 4) =8
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scoundrel [369]

Answer:

96%

Step-by-step explanation:

96% decrease

7 0
3 years ago
a ball is shot straight upward. with it's height, in feet, after t seconds given by the function f(t)=-16t^2+192t. Find the aver
jekas [21]

ANSWER

80  {ms}^{ - 1}

EXPLANATION

The average velocity of the ball is the rateof displacement over the total time.

The height of the ball, in feet, after t seconds is given by the function:

f(t)=-16t^2+192t

At time t=1, the height of the ball is

f(1)=-16(1)^2+192(1)

f(1)=-16+192 = 176ft

At time t=6, the height of the ball is

f(6)=-16(6)^2+192(6)

f(6)=-16(36)+192(6)

f(6)=-576+1152 = 576

The average velocity

=  \frac{f(6) - f(1)}{6 - 1}

=  \frac{576- 176}{6 - 1}

=  \frac{400}{5}

= 80  {ms}^{ - 1}

7 0
3 years ago
The density of water is 1 gram per cubic centimeter. A more dense object will sink, and a less dense object will float. Will a m
Bogdan [553]
Ah clever. So you need two formulas.

1) Volume of the marble.

   4(pi)r^3/3
= 4(pi)(1.4)^3/3
<span>= 11.49 (approx)
</span>
2) Formula for density.
  
    D = M / V
        = 9 / 11.49
        = 0.78

0.78 < 1

Therefore the marble will float.

8 0
3 years ago
Read 2 more answers
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Svetradugi [14.3K]

Answer:

2/4

Step-by-step explanation:

2/4 × 2= 4/8 hsuddhskshvshiseu

8 0
3 years ago
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lara [203]
(0,-3)
(2,0)
(4,3)

These are your answers
7 0
3 years ago
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