Georgia lifts free weights. the bar weighs 25 pounds. she puts two 25-pound weights and two 10-pound weights on the bar. how much do the bar and the weights weigh together?
option b. 1.93, -11.93 is the right answer.
here the given equation is x²-23 = 10x and we have to solve the equation for the value of x.
first we simplify the equation to bring in the shape of ax²+bx+c=0
x²-23 = 10x
(x²-23)-10x = 10x-10x
x²-10x -23 = 0
now we the formula for the value of
now x = (-5+6.93) = 1.93
and x = (-5-6.93) = -11.93
since he answered 3 out of a 100 incorrectly, then he answered 97 out of a 100 correctly.
percent means out of a 100, hence 97 out of a 100 as a percent is
= 97% = 0.97 as a decimal fraction
since y is already isolated, substitute it into the y of: 4x+3y=-36.
you should get: 4x+3(x+2)=-36
simplify this and you'll get:
add both of the variables:
add -6 to both sides, (because there is a -36 on one side, and a 6 on the other, you have to add a negative to eliminate the 6 whilst adding to the -36)
divide both sides by 7:
now substitute this into y=x+2