Dreya is saving money to purchase a $900 computer, and she saves $10 the first week. each week after that, she saves $3 more than the previous week, except in the last week, when she reaches $900. to have a final sum of exactly $900, how much money does dreya need to save in her final week of saving? $13 $60 $70 $73

f(x)=4

step-by-step explanation:

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

1) letter c.

2) 4 square root of 9

hope this

step-by-step explanation: