How do you factor 0 = 4x2 + 2x – 30?

Mathematics

2 answers:

Wewaii [24]2 years ago

6 0

Answer:

x= 5/2, x= -3

4x^2+2x-30=0; Factor that without the 0. Then you get 2 (2x-5) (x+3)=0.

2x-5=0 x= 5/2

x+3=0 x= -3

Hope this helps! :D

JulijaS [17]2 years ago

5 0

The answer is x = 11

first you multiply the numbers
0= 8 + 2x- 30

then you calculate that difference
0= -22+ 2x

then move variable to the left
-2x= -22

divide
x= 11

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A flash disk has the capacity of storing 1 megabyte of data. How many kilobytes of data can be stored in the same flash disk

Luden [163]

For this sort of problem, you need to be familiar with prefixes.

So:

megabyte = $1 *10^6$ bytes

kilobyte = $1*10^3$ bytes

and a regular byte would just be $1$

Now, you will need to do a conversion:

$1megabyte*\frac{1*10^6bytes}{1megabyte}*\frac{1*10^{-3}kilobyte}{1byte}$

I'm going to explain this just in case, but we convert megabytes to regular bytes in the first half by using the information I gave you above. (In one megabyte, there are $1*10^6$ bytes!)

In the second fraction thought, remember one kilobyte is $1*10^3$ bytes. However, you usually only see one of each thing on the bottom of fractions, so you need to add a negative sign to the 3. (technically you could just do $\frac{1kilobyte}{1*10^3bytes}$ , but I think it is more correct to do write it out how I did).