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Blizzard [7]
3 years ago
14

F(x) = 2x^2 – 5x; find f(3)​

Mathematics
2 answers:
Reptile [31]3 years ago
8 0

Answer:

f(3)=3

Step-by-step explanation:

This question asks us to find f(3). We want to find what f(x), or y is, when x is equal to 3.

f(x)=2x^2-5x

Substitute 3 in for x.

f(3)=2(3)^2-5(3)

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

Evaluate the exponent first. 3^2 is the same as 3*3, which is equal to 9.

f(3)=2(9)-5(3)

Multiply 2 and 9

f(3)=18-5(3)

Multiply 5 and 3

f(3)=18-15

Subtract 15 from 18

f(3)=3

Nookie1986 [14]3 years ago
4 0

Answer:

f(3) = 3

Step-by-step explanation:

f(x) = 2x^2 – 5x

Let x = 3

f(3) = 2(3)^2 - 5(3)

      = 2*9 -15

      = 18-15

      =3

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Answer:

22.7604763 degrees

Step-by-step explanation:

Note that the answer is NOT 20 degrees.

She adjusted the ramp to half the original <em>incline</em>

Therefore we have tan 40 = x = 0.839099631.

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Taking the arctan of both sides, we get

y = arctan(0.419549815) = 22.7604763 degrees

8 0
3 years ago
In a school auditorium, the number of chairs in a row is the same as the number of rows of chairs. There are 7033 students in th
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Use the total number of students as the area

Find the number or rows by taking the square root of student:

The square root of 7033 is 83.86

Round up to 84

Total seats would be rows x seats per row:

84 x 84 = 7,056 total seats

7056 seats - 7033 students = 23 empty seats

3 0
3 years ago
If Kareem’s living room has an area of 225 square feet, how much will he spend to carpet his living room?
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Answer: $ 568.99

Because 18.99+22 x 225/9 = 568.99

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z*x*y

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reasoning: if you know that 9 x 20 = 180, how can you use this to find 9 x 24? explain your strategy.
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9 * 4 = 36

180 + 36 = 216

So 9 * 24 = 216
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3 years ago
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