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aev [14]
2 years ago
10

If f(x)=x2-1, what is f(4)?

Mathematics
2 answers:
Dmitriy789 [7]2 years ago
7 0
Explanation
4^2-1
16-1
Answer
15
Marta_Voda [28]2 years ago
7 0

Answer: 15

Step-by-step explanation:

Substitute 4 in x.  

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The lenghts of two sides of. a triangle are 12cm and 15cm.between what two measures should be the length of the third side fall?
maw [93]

Answer:

m,

Step-by-step explanation:

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2 years ago
PLS HELP!! determine which ordered pair is NOT a solution of y=-4x-2.
Alexxandr [17]
Your answer is B (3, -14) 
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3 years ago
Write a numerical expression that represents the number of increments it will take to reach -60 feet.
Marizza181 [45]

Answer:

Step-by-step explanation:

Write a numerical expression that represents the number of increments it will take to reach -60 feet

4 0
3 years ago
In Exercises 3 and 4, find the values of x and y <br> plz help!!!
jonny [76]

Answer:

x = 20°

y = 30

Step-by-step explanation:

The triangle given on close inspection, it is an equilateral triangle.

Each angle in an equilateral triangle is equal. Likewise, each side is equal.

Thus;

16 + y = 46

y = 46 - 16

y = 30

The triangle that has angle 80°, the other complete angle is 60° because it's an angle of an equilateral triangle.

Thus, the smaller angle there is;

180 - (80 + 60) = 40°

Because sum of angles in a triangle is 180°

Now, x + 40 = 60°

Since that's also an angle of an equilateral triangle.

x = 60 - 40

x = 20°

8 0
3 years ago
A rocket is launched from a tower. The height of the rocket, y in feet is related to the time after launch, x in seconds, by the
gizmo_the_mogwai [7]

Step-by-step explanation:

The height of the rocket y in feet is related to the time after launch, x in seconds, by the given equation i.e.

y=-16x^2+165x+78 ......(1)

It is required to find the maximum height reached by the rocket. For maximum height put \dfrac{dy}{dx}=0.

So,

\dfrac{d(-16x^2+165x+78)}{dx}=0\\\\-32x+165=0\\\\32x=165\\\\x=5.15\ s

Put x = 5.15 in equation (1).

y=-16(5.15)^2+165(5.15)+78\\\\y=503.39\ m

So, the maximum height reached by the rocket is 503.39 m.

5 0
3 years ago
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