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fredd [130]
2 years ago
12

Twice a number decreased by 8 is 2 less than half the number. What is the number?

Mathematics
2 answers:
Diano4ka-milaya [45]2 years ago
4 0

Answer:

4

Step-by-step explanation:

with th information given we can express the equation:

2x-8=\frac{x}{2} -2

where x is the unknown number.

to clear for x first we multiply the equation by 2, to eliminate the fraction:

2(2x-8=\frac{x}{2}-2 )\\4x-16=x-4

moving all terms with x to the left:

4x-x-16=-4\\3x-16=-4

and adding +16 to each side:

3x-16+16=-4+16\\3x=12

and finally, dividing by 3

x=\frac{12}{4} =4

the number is 4.

Aleks04 [339]2 years ago
3 0

i think the equation is

2n-8=2-1/2n

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-2 &lt; n &lt;_ 6<br><br> n is an integer. What is the possible values of n?
AysviL [449]

Answer:

<h2>E</h2>

Step-by-step explanation:

E is correct!!

  • See in A the first option -2 will become equal so it will be wrong
  • and in B one option that is 0 is missing
  • and in c again -2 will be equal to -2
  • in d 7 is greater than 6

But in E all are correct!!

So answet is option e

7 0
3 years ago
Solve the following:<br> a) 4x 3= 2x + 7<br><br> b) 2x+6= 7x14
nikdorinn [45]
<h2><u>Correct question</u> : 4x - 3 = 2x + 7 </h2>

<h2><u>Solution</u> : 4x - 3 = 2x + 7 </h2>

4x - 2x = 7 + 3 \\  \\ 2x = 10 \\  \\ x =  \frac{10}{2}  \\  \\ x = 5.

<h2>•••••••••••••••••••••••••••••••••••••••</h2>

<h2><u>Correct Question</u> : 2x + 6 = 7x - 14</h2>

<h2><u>Solution</u> : 2x + 6 = 7x - 14</h2>

2x - 7x =  - 14 - 6 \\  \\  - 5x =  - 20 \\  \\ x =  \frac{20}{5}  \\  \\ x = 4.

7 0
1 year ago
15PTS PLEASE HELP ASAP!<br> (dont write random answers pls)<br> look at the pic attached:
LenKa [72]

Answer:

b) 1000m

Step-by-step explanation:

the law of sines.

you know all the angles and the length of the side a

7 0
2 years ago
Water is flowing into a large spherical tank at a constant rate. Let V (t) be the volume of water in the tank at time t, and h(t
aleksley [76]

Answer:

See solutions for detail.

Step-by-step explanation:

a.  \frac{dV}{dt} is the instantaneous rate of change of volume given with respect to time, t.

The volume's rate of change is written as a function of time.

-\frac{dh}{dt} is the rate of change in the height of water in the tank with respect to time, t.

b.  \frac{dV}{dt}- is the only constant. Water flows into the constant at a constant rate, say 6cm^3 per minute.

c. \frac{dV}{dt} is positive. Volume water in the take  is increasing from time to time.

-The volume at time t=1 is greater than the volume at t=0, hence, it's a positive rate of change.

d. \frac{dh}{dt} is a positive rate. The initial height of water in the tank is zero.

-The final height at time t is 0.25h. The height is increasing with time.

Hence, it is positive.

8 0
3 years ago
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HACTEHA [7]
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6 0
3 years ago
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