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Marrrta [24]
2 years ago
6

-2- 3(7-k) =-4(2k-1)

Mathematics
1 answer:
Ivan2 years ago
7 0

Answer:

k=27/11

Step-by-step explanation:

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if the computer screen shows this image as calinda is downloading a file, how big is the file she’s loading ?
just olya [345]

Answer:

the file is 20 kb

Step-by-step explanation:

16kb/80%

xkb/100%

1600=80%

80       80

20KB

4 0
3 years ago
Use a separate sheet of paper to solve the system of inequalities by graphing. Use the graph to decide if the point (1, –1) is i
Lena [83]

Answer:

The answer is no though, the point (1,-1) is below both.

Step-by-step explanation:

So the two inequalities are y≤-3x+3 and 3x+8y≥3

With inequalities you have to know a few things.  First, when you graph you may have to use non solid lines.  for instance, if you had x<5, 5 would not be part of the answer because it is only answers less than 5.  so you represent this by making a dashed line that says "you cannot include values on this line".  Second, with algebra, if you multiply both sides by a negative it flips the inequality.  for instance -y > 54 you would multiply (or divide) by -1 and it would change to y < -54.  Third, when graphing an inequality, treat it like an equation and graph the line as if it were said equation(with solid or dashed lines as needed)  then, if it is y > f(x) you shade in the section above the line and y < f(x) shades in below.  The shaded part is your answer basically.  Now lets get into yours.

y≤-3x+3

It is already in the form y = f(x)  so grapht he line 3x + 3 with a solid line since it is y is less than or equal to,  then shade below that line.  

3x+8y≥3

First get it so y is by itself

3x+8y≥3

8y≥3 - 3x

y ≥ 3/8 - 3/8 x

Now grapht his line  with a solid line and shade the area above it.

Now, the shaded area below between y ≥ 3/8 - 3/8 x and  y≤-3x+3 and the lines are your answer, so you need to check if the point (1, -1) is in this shared shaded area or on one of the lines.

The answer is no though, the point (1,-1) is below both.

6 0
3 years ago
What is the equation of the following graph in vertex form (0,12) (2,0) (4,-4) (6,0)
Scorpion4ik [409]
X value is going up and y value is moving up and down.  So, it`s look like a quadratic function. y intercept is 12 and x intercept is 2 and 6.  and vertex is (4,-4). than f(x)= a(x-4)^2+4. and put (0,12). and 16a+4=12. a=1/2.  f(x)=1/2x^2-4x+12 or 1/2(x-4)^2+12 
3 0
2 years ago
Clearview Window Cleaners washes 20 office windows in 168 minutes.How many hours is that?
bezimeni [28]
1 : 8.4 min
1 : 7.14 every hour
So they wash 7 windows every hour
7 0
3 years ago
Help please this is due at 12 !!!
Blababa [14]

Answer:

Angle BC, because 70+20 = 90

Step-by-step explanation:

8 0
2 years ago
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