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...

If the polynomial P(x) has factors of 12, (x-5), and (x+4), which of the following must also be afactor of P(x)? Edit: I'm so sorry that...

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...

(-5, 0) (0,-5)

What is the sum of all values of m that satisfy 2m2 - 16m + 8 = 0?

If cos x = a, where π/2 < x < π and cos y = -a, then which of the following could be the value of y?

Line x and Y is parallel. Line L pass through point (-1,-6) and vertex of parabola the equation is y=-2(x-1)+2. If (r,s) lies on line K, which of the following is another of K?

In the United States, 55 million computers, 32 million televisions, and 150 million cellphones were either disposed of or recycled in the past year. If 30% of computers, 20% of televisions, and 10%...

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...

need to use a system of equations

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...

If the graph of the equation y = ax2+bx+c passes through the points (0,2), (-6,-70, AND (8,-14), what is the value of a+b+c?

For how many values of x between 0 and 2π does sin[3x] = 1/2?

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

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

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...