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.
Okay. Handle 500-100 first. That brings it to 3{5[10+5(400)+399]}. Next, Handle 5(400). That brings you to 3{5{10+2,000+399]}. Then handle all the addition. That leads to 3[5(2,409)]. Next, configure 5(2409). That leads to 3(12045). Then do that one which ends as 36,135 for a final answer.
Answer:
6x^2 + 4xy
Step-by-step explanation:
Answer:
x = 20
y = 40
Step-by-step explanation:
2x + 50
2(20) + 50 = 90
x + 30
20 + 30 = 50
5x/2
5(20)/ 2
100/2 = 50
180 - (90 + 50)
180 - 140 = 40
y = 40
In this question, it is given that
Harish tthought of a two digit odd number greater than 50. One of its digits was half the other.
Since it is a two digit odd number. So for the number on one's place, we have 5 options which are 1,3,5,7,9. And none of these can be double .
And in the ten's place, it have to be greater then 5. So we have two options, 6 and 8.
And double of 3 is 6, so the number is 63.