X + 3 • ( 10 + y ) - 7x - 4
x + 30 + 3y - 7x - y
x - 7x + 3y - y + 30
-6x + 2y + 30
Answer:
The number is 385.
Step-by-step explanation:
Digit in ones place = 5
Let the digit in tens place be x
Let the digit ion hundreds place be y.
Digit on tens place is 3 plus the digit in my ones place:
x = 3 + 5 = 8
Digit on hundreds place is 2 less that the digit in my ones Place :
y = 5 - 2 = 3
(yx5) = (385)
The number is 385.
Answer:
y= -1/4x - 5
Step-by-step explanation:
first you need to find the slope.
to do this you can use the equation: change in y/change in x which is also y2 - y1/x2-x1
-8 - (-6)/12-4
-2/8
-1/4 = slope
since the line's equation is y = mx + b, we still need to find the y-intercept. we can do this by just plugging in one of the points
-6 = -1/4(4) + b
-6 = -1 + b
-5 = b
so the final equation is y= -1/4x - 5
It would be D because the formula is: pi r^2