Answer:
Step-by-step explanation:
We need to find the distance between the points (5, 2) and (1, 9). In order to do this, we will use something called the distance formula. The distance formula is written as follows:
Now we need to plug in our points which we have given in the form (x, y):
Next, perform the operation of subtraction inside the parentheses to simplify:
The exponent is the next step in the order of operations, so square 4 and -7:
Finally, add 16 to 49:
The square root of 65 cannot be simplified further, but an approximation can be made.
≈ 8.062257748
Answer:
90
Step-by-step explanation:
Its 630/7
Answer:
(y - 25) = - 0.25(x - 20)
Step-by-step explanation:
Given that :
Height of candle after burning for 20 minutes = 25 cm
Height after burning for 1 hr (60 minutes) = 10 cm
Height (y) in cm of candle x minutes after being lit:
Using the equation :
(y - y1) = m(x - x1)
m = (change in y / change in x)
Change in height within 60 minutes :
Height at 20 minutes = 25cm
Height after an hour = 10
Change in height per hour = (25 - 10) = 15cm
Hence, m = change in height per minute
15cm / 60 = 0.25cm ( - 0.25) (decrease in height)
y1 = 25 ; x1 = 20
(y - y1) = m(x - x1)
(y - 25) = - 0.25(x - 20)
Answer:
24
Step-by-step explanation:
18 * 4 /3 = 72/3 = 24