2018年5月9日 · You need a minimum of three points to plot a straight line. y=2x-7 the y intercept is (0,-7) When y=0, 2x=7 so => x=3.5 this gives (3.5,0) Then pick another value for x and …

2018年3月4日 · x=-12 2x+7= -17 2x= -17-7 2x= -24 (Divide both sides by 2) x=-12. Algebra Linear Equations Two-Step Equations and Properties of Equality

2016年2月14日 · #color(blue)(x^2+2x-7# This equation is a Quadratic equation (in form #ax^2+bx+c=0#). Use the Quadratic formula:

2016年4月29日 · dy/dx=3^(2x+7)ln(9) Using the derivative d/dxa^x = a^xln(a) together with the chain rule, we can note that 3^(2x+7) = f(g(x)) where f(x) = 3^x and g(x)=2x+7 and apply the …

2015年6月7日 · x=-3 and y=2. Solve x+5y=7 for x. x=7-5y Substitute 7-5y for x into the other equation. 2(7-5y)+7y=8 = 14-10y+7y=8 ' 14-3y=8 Subtract 14 from both sides. -3y=-6 Divide …

2016年7月22日 · {(x=6), (y=7) :} In order to solve a system of equations using substitution, you must express one variable in terms of the other in one equation, then use this value in the …

2016年7月6日 · x > 5 We will solve the equation similar to a standard linear equation. We will need to make x the subject so... 2x + 7 > 17 subtract 7 from both sides leaving the greater …

2016年12月31日 · See below. To complete the square, we take a quadratic equation of the form ax^2+bx+c=0 And turn it into a(x+d)^2+e=0 Begin by factoring out -2 to get a coefficient of 1 …

2016年1月3日 · So to find this we substitute #y=0 " into " y=-2x+7# giving: #0=-2x+7# Add #2x# to both sides giving: #0+2x=2x-2x+7# #2x=0+7# Divide both sides by 2 giving: #2/2 x=7/2# #1 xx …

2017年3月31日 · "Vertex :"(1,-6) "given function "y=-x^2+2x-7 "derivate the function y with respect to x and make equal to zero."