Answer:
Option B
Step-by-step explanation:
Since, number of calories 'C' burned is proportional to the number of minutes (m) given to the exercise,
C ∝ m
C = km
Where k is the proportionality constant.
From the table attached,
For C = 250 calories and m = 30 minutes,
250 = 30k
k = 
= 
Therefore, equation representing this situation will be,
C = 
Option B will be the correct option.
Answer:
Correct
Step-by-step explanation:
Well, the form
gives the maximum (if a<0) at coordinates
, where
. If a>0, the same formula gives the minimum (there's no maximum)
Answer:
(x - 6)(x + 3)
Step-by-step explanation:
Consider the product of the factors of the constant term which sum to give the coefficient of the x-term
product = - 18 and sum = - 3
The factors are - 6 and + 3, hence
x² - 3x - 18 = (x - 6)(x + 3)
Answer:
y = 6
Step-by-step explanation:
If x = 1, then: 3 x 1 + y = 9 (first equation)
3 x 1 + y = 9
3 + y = 9
y = 9 - 3
y = 6
