The campus bookstore sells graphing calculators for $110 and scientific calculators for $16. on the first day of classes, 50 calculators were sold for a total of $1,646. how many of each were sold?

9 graphing calculators and 41 scientific calculators were sold.

Step-by-step explanation:

Let be "g" the number of graphing calculators and "s" the numbe of scientific calculators.

Set up a system of equations:

You can solve the system of equations using the Elimination Method. Multiply the first equation by -16, add the equations and then solve for "g":

Substitute the value of "g" into the first equation and solve for "s":

answer: give more info

step-by-step explanation:

answer: c, the green line

step-by-step explanation:

there is no black line, eliminate b.

simple interest implies periodic payments, but the red line shows no payments, eliminate d.

simple interest has equal payments. if paid say every day, the graph is about a straight line (actually a stairstep).

the yellow line is not straight, eliminate a.

check: the green line is straight, answer is c.

simple interest with positive interest rate gives a straight line sloping up to the right. green line:

g(t) = $100 + ($200-$100) ÷ (20 years) × (t years)

= $100 + (4%/year) × ($100)(t years)

incidentally, the yellow line curving upward represents continuously compounded interest

y = $100 × 2^(t years / (14 assuming the yellow line hits $200 at 14 years. 2^0 is 1, so y(0) = $100; 2^(14/14) is 2, so y(14) = $200.