Slope = 3 - -12 / 2- -1 = 5 the only answer with slope = 5 is C
y-5 = (1)(x-3) point slope form
y = x +2 slope intercept form
y -1 = 1/4 (x- -2)
y = 1/4x + 1.5 slope intercept form
x^2 + 8x + 4 divide by 4
1/4 x^2 + 2x + 1 A = 1/4 B = 2 add 'em together
3a + 4c =106
2a + 3c = 75 multiply this eq by - 1.5 abd add to top equation to get :
-.5 c = -6.5
c = $ 13
2a + 3(13) = 75
a = $ 18
You should be able to figure it out from here:
https://web2.0calc.com/questions/circle-problem_10#r1
1200 / ( x + x + 1 1/2 ) = 220 hrs
(1200/220 - 1.5 )/2 = x = 1.977 m/hr and 3.477 m/hr
87/44 m/hr for the slower group 153/44 for the faster m/hr
.30 x + .60 ( 60-x) = .40 (60) solve for x = 30 % amount then 60% amount = 60 - x
I do not know if it is correct....look at the SECOND answer posted
https://web2.0calc.com/questions/exponents_35
1/5 * 6000 = 6000/5 = 1200
6.25 ≥ x < 6.35
