165 Answered Questions for the topic Variables

Variables Algebra 1

05/09/16

simplying and solving fractions with variables and no numbers
Cant seem to figure this out! please help!   Solve for G: M=R+V/G   Solve for A: C=3A/(A-B)    
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Variables

05/08/16

A business employs 150 workers at the start of the year, but then some employees quit or are fired. After that, the business had 142 employees
Mathematical sentence using w as the variable
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05/04/16

Please explain how you would find the discriminant of -8x^2 and 3x^2 - 6
I saw these questions on my test and had no clue how to solve them considering that we don't get our tests back, I would like to figure out how to properly do them. I understand that the formula is... more
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04/09/16

Find the base, b, for the exponential equation of the form y=a x b^x that describes each situation.
The population of a town decreased by 2.5% each year. The variable y gives the population after x years. Find the base, b, for the exponential equation of the form y=a x b^x that describes the... more
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04/01/16

Planning an investigation; Is undiluted white wine vinegar the most effective at reducing the number of microorganisms living on the surface of my skin?
Observation given; the concentration of the undiluted white wine vinegar is 5% ethanoic acid.   Questions;   1) Independent variable? 2) Dependent variable? 3) Possible range of values for... more
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03/20/16

Write a function which is given the day number, and it returns the day name (a string). Assume the days of the week are numbered 0,1,2,3,4,5,6 from Sunday to S
Write a function which is given the day number, and it returns the day name (a string). Assume the days of theweek are numbered 0,1,2,3,4,5,6 from Sunday to Saturday in Python with if statements. 
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Variables

03/11/16

give that the variable y varies inversely as x, write an equation relating x and y. x=-5,y=-30
 give that the variable y varies inversely as x, write an equation relating x and y.  x=-5,y=-30
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03/08/16

Finding numeric values of variables A & B from an equation
An amusement park designs a roller-coaster ride based on the function f(t)=at^2-bt+20, where t is the time of the ride in seconds. The designer wants to achieve the speed f'(1)=10 mph, and... more
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03/06/16

Algebra word problem
mr reed has three kids. He know the sum of their ages is 30. The sum of the two younger children equals the sum of the oldest. In three years , the youngest will be half the age of the oldest now.... more
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Variables Missing Number

02/20/16

Jeremy bought 9 water bottles with a $20 dollar bill. Each water bottle cost $2. How much change should Jeremy receive?
 Write an equation to match the problem. Use the letter c to stand for the missing number.
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12/02/15

Solve for x
1. 23x+1=3x-2  
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11/05/15

geometry side restriction of x
Triangle ABC: side AB: not given. Side BC: x+10. Side AC: 2x+4. Angles: Angle A is greater than Angle B. What are the restrictions on x?
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Variables Equations

10/26/15

John's car uses 6.4 gallons of gas for every 100 miles he works. How much gas will he need for a trip of 75 miles?
i dont understand this question due to the wording
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10/05/15

Linear Models
A salesperson recieves a base salary of $35,000 and a commission of 10% of the total sales for the year.     a. Write a linear model that shows the salesperson's total income based on total sales... more
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09/20/15

Independent and Dependent Variables
You fill up your vehicle with gas that is $3.70/gal.   Define Variables:    x= ___________                              y= ___________ Equation:                _____________     Interpret... more
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09/12/15

Math Word Problem
Terry invests her inheritance of $350,000, part at 7% per annum and the remainder at 10% per annum. After one year, the total interest was $32,600. How much was invested at each rate?   For the... more
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Variables

09/03/15

Ammy scored 4 times more points as Lenny in the basketball game. There sum was 35 points. How many points did each have?
 we are looking fort how many points each scored.
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09/02/15

How do I find the answer to vx+2=x-4
I know the answer is 7, but I can't count on trial and error, or luck , to help me on a test! What's the best method to finding the answer, especially since I need to show my work?
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08/18/15

what is the value of f(x) = -x+4 when x=-2
this is the first time I've encountered f(x) so I'm not sure how to go with the equation.
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Variables Math

07/22/15

If (x²+1) (y³+1) (z^4+1) = 0, which of the following must equal 0?
A. x+1 B. y+1 C z+1 D. x+y+z E. xyz   This was heard. Please help. Thank you!
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Variables Math

07/22/15

If s=x+2(a+x), which is 6x-1 in terms of s and a?
A. 2s-4a-1 B. 2s-2a-1 C. s-2a-1 D. 2s+4a-1 E. a-2s-1   I tried, but I don't know what the answer is. Please hep. Thank you!
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Variables Math

07/16/15

If ƒ(a,b) = 2a + 2b, all of the following are true for all values of a and b EXCEPT...
A. ƒ(a,b) = (b,a)B. ƒ(a, ƒ(a,b)) = ƒ(ƒ(a,b), b)C. ƒ(a,0) = 2aD. -ƒ(a,b) = ƒ(-a, -b)E. ƒ(a,b) + ƒ(b,a) = ƒ(2a,2b)   Please help. Thank you.
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Variables Math Algebra Equation

07/14/15

Solve this please, as quick as possible:D
(24.6+3x)÷4=-2x+2(x+4.77)
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07/03/15

Finding possible values of b and c
Three positive integers a, b and c are such that 1/a + 2/b = 1/c + 1/2. 1. Make c the subject of the formula. 2. If a=3, find the possible values if b and c.   Note: how many possible values... more
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Variables Math

07/02/15

What is the value of c in terms of a and b?
If a, b, and c are all positive integers and if a²x² + cx + b² is the square of an integer for all integer values of x, what is the value of c in terms of a and b?    Please help. Thank you!!
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