2
3
−
4
2
+
9
−
4
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given

Required
Evaluate 
We have:

Apply law of logarithm

Express 9 as 3^2

Evaluate the exponents

.
So:


Substitute 


Answer:
y = -x + 4
perp: m = 1
y + 4 = x - 3
y = x - 7
Step-by-step explanation:
Answer:
4 ....,..........................................
Answer:
85%
Step-by-step explanation:
- Calculate how many students passed on their first try. 20 x 70% is 14, so 14 students passed on their first try.
- 6 students retook the test. Half of 6 is 3. Add 3 to the 14 students that passed earlier.
- Calculate the percent with the equation 17/20 = 0.85. 0.85 = 85%.