To determine which of the choices is lies on the line represented by the equation, 2x + 5y = 4, substitute the values of the abscissas to the x of the equation and solve for y. Evaluate if the y calculated is equal to the ordinate of the ordered pair. Calculations are shown below.
A. (7, -2) ; 2(7) + 5y = 4 ; y = -2 ; EQUAL B. (0,-1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL C. (0,1) ; 2(0) + 5y = 4 ; y = 0.8 ; NOT EQUAL D. (3, -2) ; 2(-3) + 5y = 4 ; y = 2 ; NOT EQUAL
You need to divide the total amount by $75, to see how many DVD players she could buy with the $568. 568÷75= 7 remaining 43 This means that Julia can buy 7 DVD players, and will have $43 extra dollars left over.
Step-by-step explanation:4 tablets twice a day is 8 (4*2=8). 3 tablets twice a day (3*2=6) for days 2-6 which is 5 days (6*5=30) is 30. The 7th day is 1 tablet twice a day (1*2=2). You’re multiplying the tablets Ben has to take times 2. Add them all together and you have 40.
