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3 years ago

Given the function f(x)=-3(x)^2, find the value of f(5).

Mathematics

1 answer:

pentagon [3]3 years ago

5 0

Answer:

Step-by-step explanation:

you just put the 5 in the x's spot in the equation

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What would be the most logical first step for solving this quadratic equation?

Sav [38]

Answer:

D. Subtract 4 from both sides

Explanation:

I just learned about quadratic equations in school. The first step of solving quadratic equations is to make sure it is in standard form and equal to 0.

Standard form:

ax^2 + bx + c = 0

4 0

2 years ago

The angle marked a = 146 Work out the angle marked x.

notka56 [123]

Answer:

<h2>34 degrees</h2>

Basic facts:

<em>Corresponding angles are sometimes known as 'F' angles.</em>

angles in a straight line add up to 180

Step-by-step explanation:

To find the other side of <em>a</em> we follow the Basic fact annd do

180-146

=34

following the rule, we know that this is a flipped F

An F is a corresponding angle

therefore f is 34

5 0

2 years ago

consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i

eimsori [14]

we have

$f(x)=x^{2} +2x-15$

we know that

The x-intercept is the value of x when the value of the function is equal to zero

in this problem

Find the roots of the function

equate the function to zero

$x^{2} +2x-15=0$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$x^{2} +2x=15$

Complete the square. Remember to balance the equation by adding the same constants to each side

$x^{2} +2x+1=15+1$

$x^{2} +2x+1=16$

Rewrite as perfect squares

$(x+1)^{2}=16$

Square root both sides

$(x+1)=(+/-)\sqrt{16}$

$(x+1)=(+/-)4$

$x=-1(+/-)4$

$x1=-1+4=3$

$x2=-1-4=-5$

$x^{2} +2x-15=(x-3)(x+5)$

therefore

<u>the answer is</u>

the x-intercepts are the points $(3,0)$ and $(-5,0)$

3 0

3 years ago

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Solve and check the equation<br> 2(4-5x) = 2(3x+2)

Tasya [4]

ANSWER: 0,25
Ok done. Thank to me :>

3 0

3 years ago

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Question 18

My name is Ann [436]

( x-5 ) (x + 6 )
multiply

X times X + 6x - 5x - 5 times 6

connect like terms

x squared + 6x - 5x - 30

Answer is

x squared + x - 30

6 0

4 years ago

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