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ludmilkaskok [199]
3 years ago
14

Will mark as brainliest please help.

Mathematics
2 answers:
alex41 [277]3 years ago
8 0
The first one is the answer to the first question.

the second one is the answer to the second question



Masja [62]3 years ago
3 0
Y = mx + b
m = -4
use point (8, -7) to find b
-7 = -4(8) + b
-7 = -32 + b
-7 + 32 = b
25 = b

y = -4x + 25
or
y + 4x = 25
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A box is to be constructed from a sheet of cardboard that is 10 cm by 60 cm by cutting out squares of length x by x from each co
Stells [14]

Volume of a rectangular box = length x width x height<span>

From the problem statement,
length = 60 - 2x
width = 10 - 2x
height = x</span>

<span>
where x is the height of the box or the side of the equal squares from each corner and turning up the sides

V = (60-2x) (10-2x) (x)
V = (60 - 2x) (10x - 2x^2)
V = 600x - 120x^2 -20x^2 + 4x^3
V = 4x^3 - 100x^2 + 600x

To maximize the volume, we differentiate the expression of the volume and equate it to zero.

V = </span>4x^3 - 100x^2 + 600x<span>
dV/dx = 12x^2 - 200x + 600
12x^2 - 200x + 600 = 0</span>

<span>x^2 - 50/3x + 50 = 0

Solving for x,
x1 = 12.74 ;      Volume = -315.56  (cannot be negative)
x2 = 3.92 ;      Volume = 1056.31

So, the answer would be that the maximum volume would be 1056.31 cm^3.
</span><span>
</span>
6 0
3 years ago
Which function is graphed? ​
Gennadij [26K]

Answer:

x-intercept=(-1,0) y-intercept =(0,-3)

Step-by-step explanation:

6 0
3 years ago
Please help !!! Due instant
Vinvika [58]
I believe the range is 25.
4 0
3 years ago
In a group of seven people, each person flips a fair coin five times and records the results. what is the probability that at le
Firlakuza [10]
1/2+1/2+1/2+1/2+1/2
1/2+1/2+1/2+1/2+1/2
10/2
5
3 0
3 years ago
Stephanie goes shopping on Sunday. She
just olya [345]
Started with: $60
left with: $10
items bought: 20

60 - 10 = 50 < amount spent
  
50/20 = amount spent/items bought
           = $ 2.50 < each chocolate

you can check this by multiplying the items bought and the amount each item cost to get how much you spent

20 × 2.5 = 50

Stephanie started off with 60 dollars and ended with 10 dollars

60 - 50 = 10

hope this helps :)









4 0
3 years ago
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