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son4ous [18]
2 years ago
15

Solve for x. Will mark brainliest

Mathematics
1 answer:
Serjik [45]2 years ago
4 0

Answer:

41) x = 8

Step-by-step explanation:

41)

Arc MN is 100 degrees because it is the double of 50 degrees.

12x+4=100

12x-4=100-4

12x=96

x/12=96/12

x=8

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Plz help with this word problem
s344n2d4d5 [400]
Well, this problem is best solved by setting up a system of two linear equations.

A linear equation can be defined 
y=mx+b
where 
b=initial value (when x=0), and
m=rate of increase or decrease.

In the given example, the x-axis represents hour, and the y-axis, number of cells.

Chemical #1 
initial value = b = 12000 cells
rate = m = -4000 / hr
The equation is therefore 
y1=-4000x+12000......................(1)

Similarly, for chemical #2
initial value = b = 6000 cells
rate = m = -3000 / hr
The equation is therefore
y2=-3000x+6000 .......................(2)

The time the two will have an equal sized colony would represent the solution of the system of equations (1) and (2), i.e. when  y1=y2
which means
-4000x+12000 = -3000x+6000
transpose and solve for x
4000x-3000x = 12000-6000
1000x=6000
x=6 hours.

At 6 hours from the start, 
y=-4000x+12000 = -4000*6+12000 = -24000+12000 = -12000 cells

So the solution is x=6, y=-12000, or (6,-12000)

Physical interpretation
Since cells cannot have a negative number, the two are actually equal before six hours, when they are both zero.
Case 1: y=0 when x=3
Case 2: y=0 when x=2

Therefore, after three hours, both trials will have zero cells.

You have to judge whether to give the mathematical solution (x=6,y=-12000) or the physical interpretation (x=3, y=0) as the answer.


6 0
3 years ago
Read 2 more answers
What is 1/4 subtract 1 and 1/2 A. 1/2 B. 1/8 C. 3/4 D. 3/8
Lelu [443]

Answer:

-1 1/4

Step-by-step explanation:

1/4 - (1 1/2)

Get a common denominator

1/4 - 1 2/4

Take the larger number and subtract the smaller number and take the sign of the larger

1 2/4 - 1/4 = 1 1/4

The sign of the larger was negative

-1 1/4

3 0
3 years ago
Please help!! will give brainliest! show how you did it
amid [387]

Answer:

5

Step-by-step explanation: since i helped can i have brainlist please :D    

8 0
2 years ago
A) 363<br><br> B) 33<br><br> C) 7<br><br> D) 77
stich3 [128]
Aaaaaaaaaaaaaaaaaaaa
3 0
2 years ago
The following data points represent the number of puppies in each litter at Port's Pup Rescue.
NikAS [45]
2,2,6,7,9,11,14

And the Median is 7
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3 years ago
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