Answer:
A
Step-by-step explanation:
Given the 2 equations
2x + y = 13 → (1)
x - y = - 4 → (2)
Add the 2 equations term by term to eliminate the y- term, that is
3x = 9 ( divide both sides by 3 )
x = 3
Substitute x = 3 into either of the 2 equations and solve for y
Substituting into (1)
2(3) + y = 13
6 + y = 13 ( subtract 6 from both sides )
y = 7
solution is (3, 7 ) → A
Answer:
Step-by-step explanation:
We are given with Second-order derivative of function f(x).
We need to find Third-order derivative of the function f(x).
We know that,
f'''(x) = (f''(x))'
So,
Therefore,
Answer:
Step-by-step explanation:
Step 3:
Let LM = x
OK = KP = 12 units [Radii of circle K]
LN = LP = 8 units [Radii of circle L]
Therefore, KL = KP + PL
KL = 12 + 8
= 20 units
Step 4:
Since, ΔKOM and ΔLNM are the similar triangles,
By the property of two similar triangles, corresponding sides of these similar triangles will be proportional.
12x = 8(x + 20) [By cross multiplication]
12x = 8x + 160
12x - 8x = 160
4x = 160
x = 40
To answer this, determine the change in water level over 2 1/4 months: it's -11.5 inches. Next, divide this change by the time involved:
-11.5 inches
------------------- = -5 1/9 inches per month (answer)
2.25 months
Answer:
16n + 18
Step-by-step explanation:
-5n + 3(6 + 7n)
Distributing the 3 over the parenthesis:-
= -5n + 3*6 + 3*7n
= -5n + 18 + 21n
= 16n + 18