What are the formulas for the following?
1. Ryan wants to rent a car. He has 100 dollars. The rate is 29.99 per day and 38 cents a mile. How far will he be able to travel?
2. A class of 25 algebra students had a mean average on the chap. 6 test. Another class of 27 students earned a mean of 69 on the same test. What was the mean for the two classes?
3. A right triangle has a hypotonuse of 6 and a perimeter of 14. Find the area of this triangle
and some answers to this:
Use the numbers 2,3,6,11,15 in a number sentence that equals 3,7,1,6,2. use any operation
2007-06-18 14:32:42 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
1.
$100 - $29.99 = $70.01
$70.01 / $0.38 = 184.2368miles
2007-06-18 14:39:04 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1. First, subtract 100 with 29.99. Then, divide the answer, 70.01 with .38 . Your answer is approximately 184 miles.
2. / What was the mean for the first class?
3. Take the formula for area of a triangle and that is 1/2 base , meaning the number the will half of the base that you use for the equation , multiplied by the height.
The answer is 7.
2007-06-18 22:27:01 · answer #2 · answered by Kandice F 4 · 0⤊ 0⤋
1.
The distance (x) Ryan can travel in one day is found in the following way:
100 = 0.38*x + 29.99
70.01 = 0.38*x
184.24 = x
Ryan can travel 184.24 miles in one day before he runs out of money.
2.
You didn't specify the mean score for the first group of students, so I can't answer this question.
3.
Call the two unknown sides a and b. Since the hypotenuse is 6, you know that
a^2 + b^2 = 6^2
a^2 + b^2 = 36
Since the perimeter is 14, you know that
a + b + 6 = 14
a + b = 8
a = 8 - b
Plugging this into the first equation, we get
(8 - b)^2 + b^2 = 36
2*b^2 - 16*b + 64 = 36
2*b^2 - 16*b + 28 = 0
Using the quadratic formula to find b, we find the two solutions:
b = 4 + sqrt(2)
and
b = 4 - sqrt(2).
Plugging these in, we find that whichever solution we use for b, we get the other one for a, so it doesn't matter which we use.
The area of the triangle is
1/2*base*height
= 1/2*(4 + sqrt(2))*(4 - sqrt(2))
= 7
2007-06-18 21:56:54 · answer #3 · answered by lithiumdeuteride 7 · 1⤊ 0⤋
1) $100 - $29.99 = 70.01
$70.01/ $.038 = 184 miles
The rest is simple math operations like this. You just need to take the time an apply what you have learned.
2007-06-18 21:40:58 · answer #4 · answered by Lady Geologist 7 · 0⤊ 0⤋
answer for question no.1 :
100 dollars minus 29.99. the balance left devide by 0.38.
and you will get the miles.
= 184.2368 miles
2007-06-18 21:44:38 · answer #5 · answered by zeck 1 · 0⤊ 0⤋