06/15/15

perform the indicated operation
1+i/4-5i   Express the answer in form a+bi. The dash is because it divides the two equations
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06/15/15

a ball is thrown upward with an initial velocity of 96 ft/sec from a height 640ft. its height s, in feet, after t seconds is given by s=-16t2+96t+640
I do not understand how this question ends up as 12+- the square root of 784-s all over 4
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06/15/15

simplify the following
i30
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06/15/15

A game store has 150 Xbox's. If the store owner decides to increase his inventory by 17%, how many more Xbox's does he need to buy?
I don't understand this question or how to solve it. I tried to put it as a proportion but it didn't seem right. Please help!!!
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06/15/15

perform indicated operation. express answers in form a + bi
(5+3i) - (2-4i)- (3-8i)  I subtracted them together and got 9i
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06/15/15

assume that all variable are positive real numbers
3-1/3 x2/5 y-5/8 ______________ 3-10/3 x-5/2 y3/8    This is a fraction
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06/15/15

what is the least possible degree of the function?
A polynomial function with real coefficients has zeros at -2, -1, √2, and -3i. What is the least possible degree of the function?     A polynomial function with rational coefficients has zeros... more
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06/15/15

I have a 75% as my final grade , what if I get a zero on the final exam that it's worth 10% ?
Please help ! I'm really nervous for this final and I just wanted to see the lowest score with the lowest number just to see what would happen , thank you !
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06/15/15

Word problem
The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The... more
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06/14/15

How to write " the quotient of a number and seven is six" as an algebraic equation
My math teacher assigned this for homework but I do not understand how to add the quotient part to x+7=6
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06/14/15

F={z|z<4}Write FnH and F ?H using interval notation. Write Ø if set has no solution.
need help with solving this problem   F={z|z<4} H={z|z>=7}   Write F∩H and F ∪H using interval notation. Write Ø if set has no solution. please can someone help I'm in desperate need of... more
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06/14/15

Need help identifying the ordered pair(s), vertex, and x intercept.
Quadratic equation is  x^2-18x+72=0. My solution is (x=6, x=12). My instructions are: 1. Graph the quadratic equation, which I have done. 2. Label and include the ordered pair for the vertex on... more
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06/14/15

a man completed 75% of his journey. if he has 240 kilometers completed what is the total distance of his journey?
a man completed 75% of his journey. if he has 240 kilometers completed what is the total distance of his journey?
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06/14/15

Please answer this exponential growth problem.
The population of Portugal in 1980 was 9.8 million people. The population has been constantly rising at a rate of 1.5% What is Portugal's population for the year 2020?
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06/14/15

show that each expression is equivalent to ln8
(log102 + log104) / log10 e   I got as far as: log108/log10e but then I don't know how to simplify log10e and end up getting ln8 as an answer
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06/14/15

Victoria deposits money into an account bearing 5 3/8% annual interest compounded continuously.
1.) How long will it take her money to triple? 2.) How long will it take her money to sextuple? 
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06/14/15

Write a rational function (f) that has the specified characteristics. vertical asymptote: x=-2, slant asymptote: y=x+1, zero: x=2
 I've tried everything but only find that the answer is not possible. There may be a hole.   Write a rational function (f) that has the specified characteristics. vertical asymptote:... more
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06/14/15

Select the approximate values of x that are solutions to f (×)=0 where f (×)=-8×^2+2×+6
Math question
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06/14/15

How do I get the percent of adults from the survey slept longer than I did?
I slept 7.5 hours   A previous study administered to US adults showed that the amount of sleep (in hours) they get in a 24 -hour period is normally distributed with a mean of 7 hours and a... more
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06/14/15

Carlos wants to make covers for cell phones. He buys a kit for $6.15. He decides to sell the cases for $8.30.
Carlos wants to start selling cell phone covers. He buys at kit for $6.15 and decides that he will sell the phones for $8.30. How many cell phone covers does he need to sell to make a profit of $400?
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06/14/15

On a standardized national exam, the mean score was 174.9 and the standard deviation was 8.7. What percentage of the students scored less than 192.3?
Please help me out with this.
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06/14/15

Assing a value to the constant "k" which will make g continuous.
Assing a value to the constant "k" which will make g continuous.   g(x) = {(x^3+7x^2+x+7)/(x+7), when x is not = to -7 g(x) = { k, when x =-7   With other problems like this in the past you... more
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06/14/15

find the stopping distance if a van is traveling at 48mph
the stopping distance of a van varies directly with the square of the speed. a van traveling at 40mph can stop in 40ft. I need to solve for d
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06/14/15

A stockbroker charges brokerage fees for buying shares. The fees are 2.1% on the first $4000 and 1.8% on the remaining value...
A stockbroker charges brokerage fees for buying shares. The fees are 2.1% on the first $4000 and 1.8% on the remaining value. a) Given that the stockbroker earned $204.60, calculate the purchase... more
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06/13/15

Pay rise of 4.5%, new pay rate of $18.81/h. Old pay rate? Extra money p.a?
After receiving a pay rise of 4.5%, Becky's rate of pay increased to $18.81 per hour. a) What was her pay before the increase? b) How much extra will she earn over a full year if she works 35... more
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