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2 years ago

Solve. You must factor first. 2n^2 +9n - 35=0

Mathematics

2 answers:

Ksivusya [100]2 years ago

7 0

Answer:

Step-by-step explanation:

2n² + 9n - 35 = (2n-5)(n+7)

n = 2.5, -7

Pie2 years ago

7 0

Answer:

$2 {n}^{2} + 9n - 35 = 0 \\2 {n}^{2} + 14n - 5n - 35= 0 \\ 2n(n + 7) - 5(n + 7)$

then (2n-5)(n+7)

5/2 and-7

is your answer

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HELP!!!

ella [17]

Answer:

120

Step-by-step explanation:

We are given that the function for the number of students enrolled in a new course is $f(x) = 4^{x}-1$ .

It is asked to find the average increase in the number of students enrolled per hour between 2 to 4 hours.

We know that the average rate of change is given by,

$A = \frac{f(x)-f(a)}{x-a}$ ,

where f(x)-f(a) is the change in the function as the input value (x-a) changes.

Now, the number of students enrolled at 4 = f(4) = $f(x) = 4^{4}-1$ = 255 and the number of students enrolled at 2 = f(2) = $f(x) = 4^{2}-1$ = 15

So, the average increase $A=\frac{f(4)-f(2)}{4-2}$ = $A=\frac{255-15}{4-2}$ = $A=\frac{240}{2}$ = 120.

Hence, the average increase in the number of students enrolled is 120.

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3 years ago

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Step-by-step explanation:

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