Find the height of a cylinder with radius 2.5 cm and surface area 88.59 cm2.
2 answers:
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Answer:
y=-2x+19
Step-by-step explanation:
For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form: m= .
Now we have,
m= 3-7/8-6
m=-2. Since m=-2, the equation is y=-2x+b.
To find b, think about what your (x,y) points mean:
(6,7). When x of the line is 6, y of the line must be 7.
(8,3). When x of the line is 8, y of the line must be 3.
Substitute them to the equation y=-2x+b.
You can use either (x,y) point you want..the answer will be the same:
(6,7). y=mx+b or 7=-2 × 6+b, or solving for b: b=7-(-2)(6). b=19.
(8,3). y=mx+b or 3=-2 × 8+b, or solving for b: b=3-(-2)(8). b=19.
So, the equation of the line that passes through the points
(6,7) and (8,3) is y=-2x+19.
Answer:
$13.85
Step-by-step explanation:
If the textbook decreases by 11% per year, this means it will be 89% of the previous year's value since 100% - 11% = 89%
89% in decimal form = 89/100 = 0.89
Therefore, the exponential function is:
, where
is the number of years
So when ,