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3 years ago

Given f (x) = x2 + 7, evaluate f (4).

Mathematics

2 answers:

Blizzard [7]3 years ago

8 0

Answer:

f(4) = 23

Step-by-step explanation:

$f(x) = x^2 + 7$

Plug x = 4

$f(4) = 4^2 + 7$

$f(4) = 16 + 7$

$f(4) = 23$

trapecia [35]3 years ago

3 0

Answer: f(4) = 23

Step-by-step explanation: Notice that f is a function of x.

So we want to find f(4).

We find f(4) by plugging 4 in for x, everywhere that x appears in the function.

So we have f(4) = (4)² + 7.

(4)² is 16 so we have 16 + 7 which is 23.

So f(4) is 23.

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Given two equilateral triangle; the length of the sides of the 2nd triangle are 2 less than 3

goldfiish [28.3K]

9514 1404 393

Answer:

first triangle -- side: 304.8 mm; perimeter: 914.4 mm

second triangle -- side: 863.6 mm; perimeter: 2590.8 mm

Step-by-step explanation:

We are given two equilateral triangles. The perimeter of the second is given as 102 inches, so its sides have length 102/3 = 34 inches. This is 2 less than 3 times the side length in the first triangle. So, adding 2 will give 3 times the side length of the first triangle: 36 inches, which also happens to be its perimeter. Those side lengths are 36/3 = 12 inches.

Now, we know:

first triangle -- side length 12 inches, perimeter 36 inches

second triangle -- side length 34 inches, perimeter 102 inches.

These measurements are desired in millimeters. Each inch is 25.4 millimeters, so we can find the desired measures by multiplying these numbers by 25.4.

12×25.4 = 304.8; 36×25.4 = 914.4

34×25.4 = 863.6; 102×25.4 = 2590.8

The desired lengths are ...

first triangle -- side: 304.8 mm; perimeter: 914.4 mm

second triangle -- side: 863.6 mm; perimeter: 2590.8 mm

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Part of a school’s stage is shaped like a sector of a circle, as shown below. The students do not yet know the exact dimensions

Natasha2012 [34]

Answer:

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Step-by-step explanation:

<u>Use the formula:</u>

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or
radians/π = L/circumference

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