Answer:
The answers are :
1. 5%.
2. 467.50 DKK.
Step-by-step explanation:
Given:
Discount on Monday of a good at 10 percent.
Increase discount on Friday would be 15 percent.
1. Difference between the percentage = .
So, the percentage increase in discount is .
2. First, the actual price means the price without discount should be calculated.
So,let the actual price be :
According to question,
of
=
Multiplying both sides by 100
=
Dividing both sides by 90
=.
And, now the price after the announcement of the discount
of
=% of
=
=
=.
So, the price after the announcement of the percent discount is DKK.
Therefore, the answers are :
1. 5%.
2. 467.50 DKK.
We are going to solve this problem two ways:
Solution 1. Graphical
If you plot the equation of temperature
for x between 0 and 160 minutes you'll get the plot in the attachement.
The blue curve represents the variation of the temperature in time. Notice that it crosses the red line (132 degrees <span>Fahrenheit</span>) twice, at around 20 F and 70 F.
So the answer is yes, if will reach 132 F.
Solution 2. Analytical
In order to see if the variation of temperature y(x) intersects 132 F line means to solve the equation:
Step 1. Write the equation in the quadratic form:
Step 2. Calculate the discriminant:
Only by looking at the discriminant we can see that it is positive, which means that it crosses the 132 F line in two points, which also means that there are two roots of the equation, both real numbers.
Step 3 (optional). Calculate the roots of the equation.
As you can see, tha analytic solution matches the graphic solution. At time x=20.5 minutes the temperatures reaches 132 F and is still rising. At time x=69.5 minutes the temperature is again 132 F but this time is decreasing.
Answer:
13
Step-by-step explanation:
Given the expression;
2 1/3 : 4 1/3 = 7 : x
Wea re to look for x;
Convert to improper fractions;
7/3 : 13/3 = 7:x
7/3 * 3/13 = 7/x
7/13 = 7/x
Cross multiply
7x = 13 * 7
7x = 91
x = 91/7
x = 13
Hence the unknown value is 13
Answer:
-6r-18g+6t
Step-by-step explanation: