What is x+8y=-15 7x+8y=-19
2 answers:
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Answer:
Step-by-step explanation:
When looking for constant rate, you have to see what is the repeating rate or coordinate in order to solve constant rate.
Let us take two coordinate points,
- ( 1 , 5 )
- ( 3 , 15 )
If we were to look for constant rate, we have to see the similarity (in this case the multiplication of the two numbers) between the two points.
What can they be?
They both have x multiplying by 5 to get y!
1 * 5 = 5
3 * 5 = 15
The same goes with all other points on the graph, leaving you with five as the constant rate.
The probability that the student does not know the answer but he randomly guesses it is 0.146025
<h3>How to solve for the probability of having a correct guess</h3>The question has only one right answer out of 5 choices.
Probability he answers incorrectly:
1 - 0.55 * 4/5
= 0.45 * 0.8
= 0.36
Probability he does not know answer but answers the question correctly
= 0.09/0.55+0.09
= 0.140625
Read more on probability here: brainly.com/question/24756209
Answer:
124.5
Step-by-step explanation:
We need to use two different area formulas to get our final answer.
We need the area formula for the triangle = (h*b) / 2; h = height, b = base.
We also need the area for the circle = . r is radius, we will replace pi with 3.14 per instructions.
To start off, let's do the circle. A = 3.14*r^2. r is given to us, r is 8.
So, just plug this into a calculator:
This would be the area of the circle if it was full, however, we only have half of the circle, so we will divide the area in half to get our final circle area, which is 100.48 ft.
Now, for the triangle. Our height is the radius of the circle, which is 8. And our base is 6 feet. Use the formula to get the area for the triangle.
A = 8*6 / 2 = 24
The area of the triangle is 24 feet. Now, we will combine the triangle area and circle area to get our final answer.
100.48 + 24 = 124.48
Round to the nearest hundredth and you get: 124.5 ft^2