Answer:
D. 7n = 28
Step-by-step explanation:
Let's substitute 4 for n in each equation to check if it the resulting equation is correct:




Therefore the answer is D
20 mails in 1/4 day (0.25 day)
-> 1 day = 20/0.25 = 80 emails
Answer:
Step-by-step explanation:
Isolate the term of x from one side of the equation.
<h3>x-5≤10</h3>
<u>First, add by 5 from both sides.</u>

<u>Solve.</u>
<u>Add the numbers from left to right.</u>


- <u>Therefore, the solution is x≤15, which is our answer.</u>
I hope this helps you! Let me know if my answer is wrong or not.
Answer:
2x^3 - 2x^2 - 12x
Step-by-step explanation:
2x(x - 3)(x + 2)
= 2x ( x^2 + 2x -3x - 6)
= 2x (x^2 - x - 6)
= 2x^3 - 2x^2 - 12x (answer).
Answer:
90 units
Step-by-step explanation:
circumference C = 2
r
taking
as 3.
C = 2 × 3 × 15
(15 is the radius of the circle)
C = 90 units