C.
The starting temperature is 21 degrees, so this is the y-intercept.
Since the temperature dropping, the slope of 4 is negative.
The result in slope-intercept form is -4h+21
Y=9x+5 theres your answer
I do not understand this question
Answer:
all real numbers
Step-by-step explanation:
The absolute value means non negative
all non negative numbers are greater than negative numbers
so any number will satisfy this equation
Answer:
–9(3x³ – 8x + 9)
Step-by-step explanation:
–27x³ + 72x – 81
The above equation can be factorised as follow:
–27x³ = –3 * 3 * 3 * x * x * x
72x = 2 * 2 * 2 * 3 * 3 * x
–81 = –3 * 3 * 3 * 3
Common factor = 3 * 3
Greatest common factor = 9
Thus,
–27x³ + 72x – 81 = 9(–3x³ + 8x – 9)
–27x³ + 72x – 81 = –9(3x³ – 8x + 9)