Mitchell solved a quadratic equation. His work is shown below.

In which step did Mitchell make an error?

5 (x-2) ² + 6=86

5 (x-2) ²=80 Step 1

(x-2) ²=16 Step 2

x²-2²=16 Step 3

x²=20 Step 4

x=±√20 Step 5

Identify the slope and y-intercept of the line y=-6x+4

Five siblings have a combined age of 195

A marine biologist wants to determine the impact of warming oceans on the coral in Great Barrier Reef.

The test to detect the presence of the hepatitis B virus is 97% accurate for a person who has the disease and 99% accurate for a person who does not have the disease. In a given population, 0.55% of the people are infected.

A regulation football field is 120 yd long, including the two end zones. Each end zone is 10 yd long. What fraction of the football field is made up of the two end zones?

Multiply the following (4 - 2x) 2

A shopper buys a 12 - pound bag of oranges for $18.75. What is the unit price?

Harry kept a record of how far he ran each day last week Distance (in miles) Monday 4.5 Tuesday 3.9 Wednesday 4.25 Thursday 3.75 Friday 4.2 On which day did Harry run the greatest number of miles?

Matthew collects purple and red marbles. he has 320 marbles and 65% of them are purple. How many red marbles does he have?

Multiply the complex numbers. (5+1i) (-3+2i)