Answer:

Step-by-step explanation:
Use PEMDAS method to execute operations in the following order:
- Parentheses
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
First equation:
12 + (38 - 18)2 = 12 + 20 × 2 = 52
Second equation:
(12)2 - 6(2 - 23) = 24 - 6(-21) = 24 + 126 = 150
Hope this helps.
Answer:
D)
Step-by-step explanation:
we know that,
Parallel lines have the same slope
given equation is in the form given by

where m is know
as
, the answer is -⅔
Answer:
The lines are perpendicular
Step-by-step explanation:
we know that
If two lines are parallel, then their slopes are equal
If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes is equal to -1)
we have
----> equation A
isolate the variable y
Divide by 7 both sides

The slope of the line A is 
----> equation B
isolate the variable y
Divide by 3 both sides

The slope of the line B is 
Compare the slope of both lines


so
----> the lines are not parallel
Find the product of the slopes
----> the lines are perpendicular
Answer:
a. 35
b. 13
Step-by-step explanation:
a. x/5= 7
Cross Multiplication
x= (7)(5)
x= 35
b. x/2= 6.5
Cross Multiplication
x=(6.5)(2)
x=13