# Jackster

Most popular questions and responses by Jackster
1. ## word problem

Participants in a psychology experiment were able to memorize an average of M words in t minutes, where M = −0.001t3 + 0.1t2 Estimate the number of words memorizes after 14min where M=-0.001t^3 +0.1t^2

2. ## algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -5x – 7y = 25.5 -2x + 10y = -9

3. ## math

Simplify the following product of complex numbers. (8 + i) • (-4 – 3i)

4. ## Math

(5x ^3)^2(2x^7)

5. ## Math

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. -14xy / 42x^5y^8

6. ## Math

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. 6.2 • 107 / 4.15 • 103

7. ## Math

How do i solve using the elimination method. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

8. ## math

Raise the quantity in parentheses to the indicated exponent, and simplify the resulting expression. Express answers with positive exponents. (-33xy^-1/66x^0y^-3)2

9. ## algebra

Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.001518x4 + 0.067326x3 – 1.4367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is

10. ## word problem

Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 8x3 – x2 – 2x + 4. The shop estimates their costs for that quarter to be given by x2 – 4x + 7. For the second quarter, find and simplify a

12. ## Word Problem

Suzie’s flower shop estimates that supplies costs for one month will be given by the polynomial 5x2 + 4x – 7. She estimates that utilities costs for one month is given by 8x + 8. Find and simplify an expression that would estimate Suzie’s total costs

13. ## Math

Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 10^4) • (8.4 • 10^5)

14. ## math

Simplify the following quotient of complex numbers into the form a + bi. -8-8i/1+2i

15. ## math

Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 104) • (8.4 • 105)

16. ## agebra

simplify -14xy / 42x^5y^8

17. ## algebra

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -3x + 6y = -3 / -6x + 4y = -10

18. ## Inter algebra

help, I am stuck on this one. -ã(7c)^2

3X/ X^(-1)

20. ## math help

A 125-ft diagonal brace on a bridge connects a support of the center of the bridge to a side support on the bridge. The horizontal distance that it spans is 25 ft longer that the height that it reaches on the side of the bridge. Find the horizontal and

21. ## math

Find the following product: (y-10)^2

22. ## Math

multiply and check (a^2+4)(5a^3-3a-1)

24. ## Inter algebra

Simplify the following expression, and rewrite it in an equivalent form with positive exponents. (10x-5)-5

25. ## algebra

How do i solve these kind of problems? -ã((7c)^2)

26. ## Algebra

(5x ^3)2(2x^7)

1. ## algebra 2

Find the quotient: 6x^3 + 5x^2 + 2x +1 / 2x +3

posted on March 16, 2011
2. ## Algebra

Find the degree show all work: a^3b^8c^2 - c^22 + a^5c^10

posted on March 11, 2011
3. ## math

How do I find the quotient of: 4x^2-9y^2 / 2x+3y

posted on March 11, 2011
4. ## college algebra

-ã(7c)^2

posted on March 1, 2011