<em>Answer:</em>
<em>(r + 9)(r - 3)</em>
<em>Step-by-step explanation:</em>
<em>r² + 6r - 27 =</em>
<em>= r² + 9r - 3r - 27</em>
<em>= r(r + 9) - 3(r + 9)</em>
<em>= (r + 9)(r - 3)</em>
Answer:
y=-17
Step-by-step explanation:
4(-5)= -20
then -20+3= -17
Answer:
r= -10
Step-by-step explanation:
Multiply both sides by -3/4
remove parenthesis
move constant to the right
change the signs
Answer:
23 days
Step-by-step explanation:
Given that the mass of a particular substance is known to grow exponentially at a rate of 1.5% per day
Initial mass = 
After t days, mass = 
The equation is

Approximately after 23 days the mass will become 325 gms.
Answer: C. 115 pieces of candies divided equally between 5 friends is not equal to 21 each
Step-by-step explanation: 115 divided by 5 is 23 each and not 21.