Tutors Answer Your Questions about Equations (FREE)
Question 1169222: Would you please verify that I have correctly done the below problem?
3a/a+4 - 2a^2 - 16/a^2 -16 = Below is how I did the problem:
3a/a + 4 + 2a^2 - 16a/(a-4)(a-4) = 3a(a-4) + (2a^2 - 16a)/ (a-4)(a+4) = 3A^2 - 12A+ 2A^2 -16/ (A-4)(A+4) = ANSWER 5A^2 - 28A / (A-40(A+4) or 5a^2 -28a/a^2 -16
Thank you
Click here to see answer by Edwin McCravy(20054)  |
Question 1169222: Would you please verify that I have correctly done the below problem?
3a/a+4 - 2a^2 - 16/a^2 -16 = Below is how I did the problem:
3a/a + 4 + 2a^2 - 16a/(a-4)(a-4) = 3a(a-4) + (2a^2 - 16a)/ (a-4)(a+4) = 3A^2 - 12A+ 2A^2 -16/ (A-4)(A+4) = ANSWER 5A^2 - 28A / (A-40(A+4) or 5a^2 -28a/a^2 -16
Thank you
Click here to see answer by MathLover1(20849)  |
Question 1169299: For the following exercise, write a linear function to model the given data and make the indicated estimation. See Example 7. (Objective 6)
Suppose that in 2000 there were approximately 502 violent crimes per 100,000 people. Suppose further that in 2009 violent crimes dropped to about 424 per 100,000 people. Using the linear function model, estimate the number of violent crimes in 2021 for a city with a population of 400,000.
Click here to see answer by Boreal(15235)  |
Question 1169299: For the following exercise, write a linear function to model the given data and make the indicated estimation. See Example 7. (Objective 6)
Suppose that in 2000 there were approximately 502 violent crimes per 100,000 people. Suppose further that in 2009 violent crimes dropped to about 424 per 100,000 people. Using the linear function model, estimate the number of violent crimes in 2021 for a city with a population of 400,000.
Click here to see answer by Theo(13342)  |
Question 1169155: Subscript notation is frequently used for working with larger systems of equations. Use a matrix approach to solve the system. Express the solutions as 4-tuples of the form
(x1, x2, x3, x4).
x1 − 3x2 − 2x3 + x4 = −4
−2x1 + 7x2 + x3 − 2x4 = −2
3x1 − 7x2 − 3x3 + 3x4 = −5
5x1 + x2 + 4x3 − 2x4 = 20
Click here to see answer by greenestamps(13198)  |
Question 1169455: Did I correctly simplify the below problem?
If not, please show where I have not done it correctly, and show the correct simplified solution to the problem.
1/a+b
+
5/2(a+b)
=
7a+7b/
2a2+4ab+2b2
Thank you
Click here to see answer by Theo(13342)  |
Question 1169513: Consider a proper fraction such that the numerato is 2 less than the denominator. If the numerator and denominator are each increased by 1, then the ration of the numerator and denominator of the new fraction is 4:5. Determine the original fraction.
Click here to see answer by Theo(13342)  |
Question 1169512: A tank containing 50 litres of water develops a leak and loses water at a constant rate. After 20 minute it contains 40 litres. After a further 30 minutes the tank is 5% of its full capacity. Determine the tank's capacity.
Click here to see answer by Theo(13342)  |
Question 1169511: Three friends A, B and C dine out and decide to split the the bill according to what they order. A's portion and B's portion of the bill totalled $35,while B's portion of the bill was $5 less than C's portion of the bill. The ratio of A's portion to C's portion of the bill is 4:5. Determine the total bill amount.
Click here to see answer by Theo(13342)  |
Question 1169604: Cara has a piece of wire. She bent the wire into square and then bent it into an equilateral triangle. She found that the length of a side of the square is 5 cm shorter than that of the equilateral triangle.Find the length of a piece of wire.
Click here to see answer by math_tutor2020(3816) |
Question 1169621: Find the dependent variable in the situation, "You are selling books for $4 each to raise money for a trip."
a. cost of trip
b. price per book
c. #of books
d. total amount of money raised
e. date of trip
Click here to see answer by Theo(13342)  |
Question 1169673: The business partners, A, B and C, share the profit as follows:
The ratio of A's share to B is 6:5 and the ration of B's share to C is 3:4. Determine:
1.1 A's share: B's share: C's share
1.2 the total profit if A gets $5000 less than C
Click here to see answer by math_tutor2020(3816) |
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