Sumiko and Chung are shopping. Chung wants to buy a video game that costs $60, and Sumiko wants to buy a new pair of sunglasses for $80. In their possession, they have a gift card for $20 dollars, applied after taxes, and a 15 percent off coupon, applied before taxes. Sumiko and Chung want to use their remaining money to buy lunch, which they will split, at the mall. Assuming that taxes are 8.7 percent, who should use which savings option to ensure they have the most money remaining for lunch?

1.83

Step-by-step explanation:

First, add the game and glasses. Write down the number you just got. Now, multiply by 0.15.

Take the second away from the first.

Now multiply that by 0.087

Finally, take 20 away

That is how much money you have spent.

Use both savings so they both get a huge meal.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

slope is 35 and 20 miles is the y-intercept.

step-by-step explanation: