DIRECTIONS: Use this information to answer Parts A and B. An oil painting was sold at an auction house for $6,550. The buyer agrees to pay that price plus a commission called the buyer's premium. For the painting, the rate for the
buyer's commission was 25%.

Picture is part b

Part A:

Total Spent: $

PartB:

1: $655

2: $327.50

3: $1,310

4: $1,637.50

Step-by-step explanation:

6,550·0.25=1,637.50

6,550·0.1=655

6,550·0.05=327.50

6,550·0.2=1,310

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15