What is the value of x in the solution to the system of equations?

-3x=2y+14
y=6x-18

a)50/9

b)22/15

c)-46/5

d)-22/9

2.5 milligrams is equivalent to how many grams

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation.

Consider the function f left parenthesis x right parenthesis equals 4 x squared minus 3 x minus 1f(x)=4x2−3x−1 and complete parts (a) through (c). (a) find f left parenthesis a plus h right parenthesis f(a+h); (b) find startfraction f left parenthesis a plus h right parenthesis minus f left parenthesis a right parenthesis over h endfraction f(a+h)−f(a) h; (c) find the instantaneous rate of change of f when aequals=77.