Step-by-step explanation:
1/2 the fourth answer :)
Answer:
X = -1/2 or 1/2
Step-by-step explanation:
When the square root of a number is found, this usually results in 2 solutions which may be equal in size but opposite in signs.
As such,
X^2=1 to find x find the root of both sides
X = √1
X = -1 or 1
Going by this
4x^2=1
Divide both sides by 4
X^2=1 /4
taking the square root of both sides
X = √1/4
The root of 1 is -1 or 1 while that of 4 is -2 or 2 hence,
X = -1/2 or 1/2
See explanation.
Step-by-step explanation:
To find the amount of profit earned in each product,apply the percent profit formula;
%profit= profit/original price *100
<u>a)Candy </u>
% Profit =65%
Selling price = $6400
This means;
165%=6400
100%=?
Cross multiply
(100*6400)/165 =$3878.80
Original price= $3878.80
Profit= $6400-$3878.80
=$2521.20
<u>b)Wrapping Paper</u>
%profit= 40%
Selling price= $1200
This means;
140%=$1200
100%=?
Cross-multiply
(1200*100)/140=$857.14
Original price=$857.14
Profit=$1200-$857.14
=$342.90
<u>c)Stationery</u>
%profit= 50%
Selling price =$900
This means;
150%=900
100%=?
Cross-multiply
(900*100)/150 = $600
Original price = $600
Profit= $900-$600=$300
<u>d)Calender's</u>
%Profit=25%
Selling price=$3120
This means;
125%=$3120
100%=?
Cross-multiply
(100*3120)/125=$2496
Original Price=$2496
Profit= $3120-$2496=$624
2)
Selling price for pens and pencils =$4500
%percent profit earned = 42%
Profit earned will be:
142% = $4500
100%=?
Cross-multiply
(100*4500)/142 =3169.01
Original price=$3169.01
Profit= $4500-$3169.01
=$ 1331
Learn More
To find profit : brainly.com/question/927518
Keyword : Percent profit,
#LearnwithBrainly
If you change the decimal to a fraction you will be able to tell be cause a proportion is basically a fractional part
F (g (x))= 2/(2/x)
=2×(x/2)
=x
g (f (x))=2/(2/x)
=2 (x/2)
=x
f and g are inverses functions
