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dsp73
3 years ago
13

4x-1divide by 2=x+7 what is x

Mathematics
1 answer:
sertanlavr [38]3 years ago
6 0
X= 2.5
just move the terms collect the terms calculate it, divide both sides !!
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A person is to install five devices each 6 7/8 inches wide with 3 1/2 inches between switches. how much space will be needed to
solong [7]
Refer to the diagram shown below.

w = 6 7/8 in = 6.875 in, the width of each device.
d = 3 1/2 in = 3.50 in, the space between teo devices.

The total space needed is
D = 4(w+d) + w
    = 5w + 4d
    = 5*6875 + 4*3.5 
D  = 48.375 in  or 48 3/8 in

Answer:  48 3/8 inches or 48.375 inches

6 0
3 years ago
Which is a y-intercept of the graphed function
dybincka [34]

Answer:

\displaystyle (0, -9) \\ (0, -3)

Step-by-step explanation:

There is no graph posted, but y-intercepts are <em>x</em>'s are set equal to zero.

I am joyous to assist you anytime.

4 0
3 years ago
The lines graphed below are parallel. The slope of the red line is -4/3. What is the slope of the green line?
Anna35 [415]
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6 0
3 years ago
Find the geometric sum 4 + 12 + 36 + . . . + 236,196.
Zolol [24]
The answer choices are sufficiently far apart that you can work this backward. The sum will be ...
  236,196*(1 + 1/3 + 1/9 + 1/27 + ...)
so a reasonable estimate can be given by an infinite series with a common ratio of 1/3. That sum is
  236,196*(1/(1 - 1/3)) = 236,196*(3/2)

Without doing any detailed calculation, you know the best answer choice is ...
  354,292


_____
There are log(236196/4)/log(3) + 1 = 11 terms* in the series, so the sum will be found to be 4(3^11 -1)/(3-1) = 2*(3^11-1) = 354,292.

Using the above approach (working backward from the last term), the sum will be 236,196*(1-(1/3)^11)/(1-(1/3)) = 236,196*1.49999153246 = 354,292

___
* If you just compute log(236196/4)/log(3) = 10 terms, then your sum comes out 118,096--a tempting choice. However, you must realize that the last term is larger than this, so this will not be the sum. (In fact, the sum is this value added to the last term.)
3 0
3 years ago
Prove that the diagonals of a parallelogram bisect each other.
lutik1710 [3]

Answer:2a + 2b, 2c

Step-by-step explanation:

4 0
3 years ago
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