Mix

07/09/17

Mixture problem

most gold jewelry is 14-karat gold, approximately 58% gold. If 18-karat gold is 75% gold and 12-karat gold is 50% gold, how much of each should be used to make a 14-karat gold bracelet weighing 100... more

07/09/17

Find the real zeroes and multiplicity of 3x(2x+5)(x-4)^2(x+8)^3

College Algebra Help

help with word promblem need answer

A suspension bridge with weight uniformly distributed along its length has twin towers that extend 75 meters above the road surface and are 400 meters apart. The cables are parabolic in shape and... more

linear systems using the substitution method??

6x=3y+2y-2x+4=0

Two Fractions have Denominators

Set up a linear system and solve it using elimination to determine the two numerators. Two fractions have denominators 3 and 4 and their sum is 17/2. If the numerators are switched, the sum is 3/2.

07/08/17

Survey problems

The Tampa School District services the Elementary and Middle schools in Tampa. There are 27 teachers teaching in Tampa Elementary Schools and 53 teachers teaching in Tampa Middle Schools. If the... more

Percentage of worldwide population smartphone usage

In 2014, there were approximately 1.75x10^9 smartphones users worldwide. If the world's population in 2014 was about 7.19x10^9, determine the approximate percentage of the worldwide population that... more

07/08/17

A=1/2(b1+b2)h solve for h

A is the Area of a Trapezoid. B1+B2 are the bases. H is the height. 

Graphing and slope

A student incorrectly graphs the data and plots the volume on the y-axis and the mass on the x-axis. How will this affect the units for the slope of the line? What will the student need to do... more

07/07/17

Sales job commission

You are considering a sales job that pays a base salary of $200 per week plus a 5% commission on whatever you sell. If you will be selling items that average $500 per sale, how many of those do you... more

Suppose that an individual has a body fat percentage of 15.3 % and weighs 149 pounds. How many pounds of his weight is made up of fat?

Suppose that an individual has a body fat percentage of 15.3%and weighs 149pounds. How many pounds of his weight is made up of fat? Round your answer to the nearest tenth.

07/07/17

A block of mass 10 kg slides down an inclined plane that has an angle of 30. If the inclined plane has no friction and the block starts at a height of 2 m, how

 how much kinetic energy does the block have when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2.

i need to find the perimeter by and the only info given is the area

Stephanie wants to put a fence around her garden at her house. She knows that the fence will be in the shape of a square, but she only knows that a = 4 feet. How much fence will she need for the... more

07/07/17

what is the dilution factor if you make a 1/10 dilution and then make another 1/10 dilution from the first dilution?

So if I start with a stock tube of 100ul and take 10ul + 90ul water to make a 1/10 dilution that is my 1/10 dilution of the stock. Now if I make another dilution from my 1/10 by taking 0ul + 90ul... more

Multiplying negative powers of 10 inquiry.

Good afternoon. Mind blown on this one. I am a homeschooling father with an interesting problem. When multiplying negative powers of 10 the process is to simply add them together, thus... more

07/07/17

Write a system of equation to model each situation

Write a system of equation to model each situation.solve by any method.   one antifreeze solution is 20 alcohol. Another antifreeze solution is 12% alcohol. How many liters of each solution... more

07/06/17

Defining functions of x

Determine if the following equations define functions of x:   a. y=√x+5   b. x2+y2=5

Rational and irrational numbers

Given the set of real numbers x, such that x<2,   a. Provide an example of a rational number in this set   b. Provide an example of an irrational number in this set

07/06/17

Given the function f(x)=-3e^(x+1), find f(x) if x=2 Show your work

Given the function f(x)=-3e^(x+1), find f(x) if x=2 Show your work

07/06/17

I don’t understand square of a number, help!

what is the square root of 32 minus the square root of 8?

07/06/17

Find the simple interest owed if $430 is borrowed at 5.9% for 9 years.

Find the simple interest owed if $430 is borrowed at 5.9% for 9 years.  

07/06/17

Find all solutions of the equation in the complex number system. X^3-8=0

basic concept

07/06/17

Odell has the same number of quarters,dimes , and nickels . In all he has $4 in change. How many of each did he have

It is any type of strategy to solve this problme  

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