Jackster
Most popular questions and responses by Jackster
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
asked on March 4, 2011 
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
asked on February 21, 2011 
math
Simplify the following product of complex numbers. (8 + i) • (4 – 3i)
asked on March 2, 2011 
Math
(5x ^3)^2(2x^7)
asked on March 2, 2011 
Math
Simplify the following expression, and rewrite it in an equivalent form with positive exponents. 14xy / 42x^5y^8
asked on March 1, 2011 
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
asked on March 1, 2011 
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
asked on March 23, 2011 
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
asked on March 2, 2011 
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
asked on March 8, 2011 
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
asked on March 7, 2011 
Math
adding (1/4x^21/6x3/8)+(1/4x^21/4x1/2)
asked on March 6, 2011 
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
asked on March 4, 2011 
Math
Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 10^4) • (8.4 • 10^5)
asked on March 3, 2011 
math
Simplify the following quotient of complex numbers into the form a + bi. 88i/1+2i
asked on March 2, 2011 
math
Express the answer using scientific notation; retain all nonzero decimal places. (1.9 • 104) • (8.4 • 105)
asked on March 2, 2011 
agebra
simplify 14xy / 42x^5y^8
asked on March 1, 2011 
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
asked on February 21, 2011 
Inter algebra
help, I am stuck on this one. ã(7c)^2
asked on March 1, 2011 
algebra
3X/ X^(1)
asked on February 28, 2011 
math help
A 125ft 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
asked on March 22, 2011 
math
Find the following product: (y10)^2
asked on March 13, 2011 
Math
multiply and check (a^2+4)(5a^33a1)
asked on March 3, 2011 
Math
ADD: (14.9a^3+3.2a^25.1a)+(2.1a^23.7a+4.6)
asked on March 3, 2011 
Inter algebra
Simplify the following expression, and rewrite it in an equivalent form with positive exponents. (10x5)5
asked on March 1, 2011 
algebra
How do i solve these kind of problems? ã((7c)^2)
asked on February 28, 2011 
Algebra
(5x ^3)2(2x^7)
asked on February 28, 2011

algebra 2
Find the quotient: 6x^3 + 5x^2 + 2x +1 / 2x +3
posted on March 16, 2011 
Algebra
Find the degree show all work: a^3b^8c^2  c^22 + a^5c^10
posted on March 11, 2011 
math
How do I find the quotient of: 4x^29y^2 / 2x+3y
posted on March 11, 2011 
college algebra
ã(7c)^2
posted on March 1, 2011