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Airida [17]
3 years ago
14

A number is Multiplied by 3 and 5 is added. If one half of the new nummber is 16, what was the first number​

Mathematics
1 answer:
borishaifa [10]3 years ago
5 0

Step-by-step explanation:

The original number is x.

The new number is 3x + 5.

We know that 0.5(3x + 5) = 16, so 3x + 5 = 32.

3x + 5 = 32, 3x = 27, x = 9.

Hence the original number is 9.

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The price of an item increased from 20 to 30. The percentage of increase is pls help me I have exam after a week pls I hope you
Veronika [31]

Answer: 50% increase

Step-by-step explanation:

Think of 20 as 100%

Half of 20 is 10 which is 50% in this scenario.

30-20=10

This means that the price of the item increased by 50% or 10.

6 0
2 years ago
HELP!!!!!plz!!!!!!ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Ugo [173]
Is it not 2? or half?
8 0
3 years ago
Help plsss fast plsplspsls
Bess [88]
The first answer is c
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4 0
3 years ago
(x+3)^2 + 16/(x+3)^2 = 92 <br><br> x + 1/(x+3) = ??
Irina-Kira [14]
One
Remark

This is very complicate unless you pick the right method. It's very handy o know about substitutions.

Method
Let z = (k + 2)^2

Now the problem becomes
z + 16/z = 92           Multiply through by z 

Solution
z^2 + 16 = 92z
That does not look very promising. If you know the quadratic formula, this mess can be solved. If you do not know what the quadratic formula is, then what I've written is the answer. 

Worse yet, you have to know what complex numbers are. Is this something you know about? The z form of this equation is fine. It gives answers that are rational. The problem is that both are negative and so in your next step, you will be forced to take the square root of a negative number.

Maybe the answer is just
(x + 3)^ + 16 = 92(x + 3)^2
If all you have to do is expand this then you get
x^2 + 6x + 9  + 16 = 92(x^2 + 6x + 9) Remove the brackets.
x^2 + 6x + 25 = 92x^2 + 552x + 828  Put the left over to the right.
0 = 92x^2 - x^2 + 552x - 6x + 828 - 25
0 = 91x^1 + 546x + 803


It looks that way from the second question. If I'm wrong about that, put a comment down below.

Two
 Put over a common denominator and expand
\frac{(x + 3)^2 + 1}{(x + 3)^2}  =  \frac{x^2 + 6x + 9 + 1}{x^2 + 6x + 9} =  \frac{x^2 + 6x + 10}{x^2 + 6x + 9}
3 0
2 years ago
11c4 how do I get the answer
Yakvenalex [24]

Answer:

330

Step-by-step explanation:

This is the "choose" formula.

The equation for the choose formula is this:

nCk = n! / k!(n-k)!

! = factorial.

Plug in our numbers:

11C4 = 11! / 4!(11-4)!

39916800 / 24(5040)

39916800 / 120960

330

6 0
3 years ago
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