The answer is 6, but I don't understand the "why."

The answer is 6, but I don't understand the "why."

A telephone company charges x cents for the first minute of a call and charges for any additional time at the rate of y cents per minute. If a certain call costs $7.75 and lasts more than one minute...

if x<0 and 9<lx-5l<10 then what are the possible values for lx-1l?

If 3r-s=10 then which of the following is equivalent to 27^r/3^s? The choices are 27^2, 9^4, 3^10

anyone could help me find the answer for this the given formula was( F=75-2q)Mr.Thomas has created a rubric for calculating the raw score before any grading curve for the united states history final...

Getting Started I took the exam at Irvine Valley College. Unlike most schools, whose administrators post classroom assignments on a billboard, IVC showed up around 8:15, had students stand in the quad, and verbally had students split into separate groups like cattle. Then students ended up having to walk down a confusing pathway to a classroom, where we had to have our IDs checked... read more

need to use a system of equations

Ellen's Rules for Effective Time Management, Part 2 3. Know when it’s time to take breaks. Spending a good chunk of time on one subject is good; it helps you settle into a rhythm and lets your brain get into the correct frame of reference for the subject. But there exists a horizon beyond which no progress can or will be made. It’s the point at which your brain has become over-saturated... read more

A dealer sold two cars, each for $1,200. From one car he realized a profit of 25% of his cost. From the other he suffered a loss of 25% of his cost. Determine his overall gain or loss as a result...

Hi,i would like to know about tricks in SAT mathmatics test. I always can't figure out this questions -> that problem expressed in words or table chart question. Thank...

A)570 B)513 C)214 D)155

hey I don't have idea how to calculate this problem. please give me an advice. kx-3y=4 4x-5y=7 x and y are variables,k is a constant . For what value of k will system of equations...

I mentioned this problem from one of my earliest blog posts with one of my students last week, so I thought I'd bring it back as this week's Math Journey. Enjoy! ~ The SAT messes with your head. Don't feel embarrassed, it messes with everyone's head. It's designed to. The SAT is a test of your critical reasoning skills, meaning it's actually far more about logic... read more

A landscaper is designing a rectangular fountain with a 4-foot-wide path around it. The equation A = 4p + 64 will relate the area A, in square feet, of the path to the perimeter p, in feet, of...

A value added to a variation that is proportional, is known as a/an _______. A. extra B. addend C. constant D. subtend

In the equation y = kx, k represents the ____________________. A. constant of change B. variability quotient C. scalar D. constant of variation

A teacher’s salary is modeled by the equation an=48,000(1.0325)t−1 where t represents years of experience. How much should this teacher expect to pay in their 5th year of teaching? A. $52,833...

y = x2-2x+1 y = -2x + 13/4 If the point (x,y) is a solution to the system of equations above in which x>0, what is the value of y?

Given that x < 0, which of the following is equivalent to the epxression ((1/(x-1)+(1/(x-2))/(4x-6)? A. 1/(2x2-6x+4) B. 2/(x2-3x+2) C. (8x2-24x+18)/(x2-3x+2) D...

The expression (5x-2)/(x+3) is equivalent to which of the following? A. (5-2)/3 B. 5 - (2/3) C. 5 - (2/(x+3)) D. 5 - (17/(x+3))

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