Answer:
Mark has 23 marbles, Don has 74 marbles
Step-by-step explanation:
Mark has x marbles, Don has y marbles
y = 5 + 3x
x + y = 97
so
x + (5 + 3x) = 97
4x = 97 - 5 = 92
x = 92/4 = 23
y = 97 - 23 = 74
firstly chain rule is dy/dx = dy/du * du/dx
a) y = 5u² + u - 1 hence dy/du = 10u +1
u = 3x +1 hence du/dx = 3
so dy/dx = 3(10u +1) {sub in u and expand}
b) y= u^-2 hence dy/du = -2u^-3
u=2x+3 hence du/dx = 2
so dy/dx= 2(-2u^-3) {sub in u}
Answer:
14 years
Step-by-step explanation:
If the value of the car is $28,000 and each year the value goes down by $2,000 it will be $0 in 14 years. 28/2=14
Answer:
Step-by-step explanation:
line with slope of 3/4 going through the points (-8,4)
in y = mx + b form, the slope will be in the m position. And ur points are always (x,y).......so x = -8 and y = 4
now sub all ur info into y = mx + b and we are gonna solve for the only thing we dont have and thats b, the y intercept
y = mx + b
4 = 3/4(-8) + b
4 = - 24/4 + b
4 = -6 + b
4 + 6 = b
10 = b
so ur equation for this line is : y = 3/4x + 10 <===
360-138-102-47=73
B is the answer
