Part A
To identify the values of x that make 2x−1 positive
⇒ 2x - 1 > 0
⇒ 2x > 1
⇒ x > 
As a result, for any x greater than

, the expression 2x-1 is positive
Part B
To find values of y making 21−37 negative
⇒ 21-3y < 0
⇒ 21 < 3y
⇒ 7 < y
Thus, for all y values exceeding 7, the expression 21-3y is negative
Part C
To identify values of c that digit 5−3c greater than 80
⇒ 5-3c > 80
⇒ -3c > 75
⇒ -c > 25
⇒ c < -25
Therefore, for values of c less than -25, the expression 5-3c surpasses 80
Answer:

Step-by-step explanation:
Refer to the attached bar graph.
The bar graph illustrates the count of reserved campsites at a campground across a week.
Consequently, the total number of reserved campsites on Friday and Saturday will amount to (26 + 30) = 56.
Now, calculating the total reservations from Monday to Sunday gives us (5 + 3 + 4 + 7 + 26 + 30 + 9) = 84.
Therefore, the percentage of bookings for Friday and Saturday will be
. (Answer)
136 = x.
In detail: When an angle is presented, the angle opposite corresponds to the first equation. The angles at the bottom equal a total of 360, so calculating 46 x 2 = 92. Subtracting 92 from 360 gives 268. Dividing that by 2 yields one of the larger angles as 134 degrees. The upper angle correlates to the lower one, therefore, 136 = x.
Answer:
The y-intercept for line MN is 2
The standard form of the equation is revealed as ⇒ x + y = 2
Step-by-step elucidation:
Coordinates marking the ends of line MN → M(-3, 5) and N(2, 0)
The slope of the line was computed as 
= 
= -1
For line MN which passes through (-3, 5) with a slope of -1, the equation formulated is given by
y - 5 = (-1)(x + 3)
This simplifies to
y - 5 = -x - 3
Thus resulting in
y = -x + 2
Here the equation appears in the y-intercept form of
y = mx + b
where m represents the slope of the line and b denotes the y-intercept
So, consequently, the y-intercept for line MN is 2
The equation generates in the standard form as
x + y = 2
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His annual savings over 52 weeks amounts to $867.