All categories

2 years ago

F(x)=2x^2+9 Find f(-5)

Mathematics

2 answers:

Marrrta [24]2 years ago

6 0

════════ ∘◦❁◦∘ ════════

<h3>Answer = 59</h3>

════════════════════

<h3>Known </h3>

f(x) = 2x² + 9

════════════════════

<h3>Question</h3>

f(-5) = ?

════════════════════

#as you the x inside the (x) changed into (-5) it means that you need to change the x into -5.

f(-5) = 2(-5)² + 9

= 2 × 25 + 9

= 50 + 9 = 59

<em>#</em><em>S</em><em>o</em><em> </em><em>f</em><em>(</em><em>-</em><em>5</em><em>)</em><em> </em><em>=</em><em> </em><em>5</em><em>9</em>

════════════════════

Serga [27]2 years ago

3 0

Answer:

Step-by-step explanation:

Given

f(x) = 2x² + 9

f ( -5) = 2 * ( -5)² + 9

= 25 * 2 + 9

= 50 + 9

= 59

You might be interested in

In the figure below, triangle JKL is isosceles, with JK = LK, and triangle LMN is equilateral. K M M N L Note: picture not drawn

Musya8 [376]

Answer: 56

Step-by-step explanation:

6 0

2 years ago

Point C is on line segment \overline{BD} BD . Given CD=x,CD=x, BC=5x-5,BC=5x−5, and BD=2x+7,BD=2x+7, determine the numerical len

NARA [144]

Answer:

$CD = 3$

Step-by-step explanation:

Given

$CD = x$

$BC = 5x - 5$

$BD = 2x + 7$

Required

Determine CD

Since, C is a point on BD, the relationship between the given parameters is;

$BD = BC + CD$

Substitute the values of BD, BC and CD

$2x + 7 = 5x - 5 + x$

Collect Like Terms

$2x - 5x - x = -5 - 7$

$-4x = -12$

Divide both sides by -4

$\frac{-4x}{-4} = \frac{-12}{-4}$

$x = 3$

To determine the length of CD;

Substitute 3 for x in $CD = x$

Hence;

$CD = 3$

3 0

2 years ago

Lily saved 16 coins. She saved ten-can and one-dollar coins only. If she had $5.20, how many ten-cent coins did she have?

Firlakuza [10]

Answer:

Step-by-step explanation:

Let d represent the number of dimes Lily saved. Then the value of her coins in cents is ...

10d +100(16-d) = 520

-90d +1600 = 520 . . . . . eliminate parentheses, collect terms

-90d = -1080 . . . . . . . . . . subtract 1600

d = -1080/-90 = 12 . . . . . divide by the coefficient of d

Lily has 12 ten-cent coins.

4 0

3 years ago

A store has 40% off sale on headphones. With this discount, the price of one pair of headphones is $36.00

Nataliya [291]

40 % off means we pay 60 % (must total 100%)

original price * 60 % = 36.00

change percent to decimal

original price * .6 = 36

divide each side by .6

orginal price = 60

7 0

3 years ago

The value of 27degree in grade measure is<br>1. 50 grade<br>2. 30grade<br>3. 40grade<br>4. 45grade

Crank

Answer:

30 grade

Is the answer according

to me

5 0

2 years ago