Juliet decided to solve the quadratic x2 + 8x = 9. Which of the following steps is where she made her first mistake? x2 + 8x = 9 Step 1: x2 + 8x − 9 = 0 Step 2: (x + 9)(x − 1) = 0 Step 3: x = 9 and x = -1

Step-by-step explanation:

hello

last step is not good

from

(x+9)(x-1) = 0 we can write

<=> x+9 = 0 or x-1=0

<=> x = -9 or x = 1

so the solutions are -9 and 1

hope this helps

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west

alaska, florida, nevada, south dakota, texas, washington and wyoming, tenessee and new hampshire.

step-by-step explanation: