All categories

2 years ago

If f (x)= 2x^2-7 find f (4)

Mathematics

2 answers:

sladkih [1.3K]2 years ago

7 0

Answer:

Step-by-step explanation:

f(x)=2x+7

f(4)=2(4)+7

=8+7

=15

f(-4)=2(-4)+7

=-8+7

=-1

f(4)+f(-4)

=15+(-1)

=14.

Contact [7]2 years ago

4 0

Answer:

Step-by-step explanation:

f (x)= 2x^2-7

Let x=4

f (4) = 2 ( 4)^2 -7

Exponents first

f(4) =2*16 -7

Multiply

f(4) =32 -7

Subtract

f(4) =25

You might be interested in

4) This results when you flip the numerator and denominator of a fraction.

Semenov [28]

Answer:

To divide one fraction by another one, flip numerator and denominator of the second one, and then multiply the two fractions. The flipped-over fraction is called the multiplicative inverse or reciprocal.

Step-by-step explanation:

I got this from google.

3 0

3 years ago

(please zoom / zoom out if needed to see question. (: )

DaniilM [7]

Arc length = 2 π R (C/360)
where:
C is the central angle of the arc
R is the radius of the arc

arc length = 2 π R (137/360) = 2.39R

5 0

2 years ago

Determine the number of possible triangles, ABC, that can be formed given angle A = 30°, a = 4, and b = 6.

Sophie [7]

Answer:

Step-by-step explanation:

Alright, lets get started.

using Sine Law,

$\frac{sinA}{a}=\frac{sinB}{b}$

$\frac{sin30}{4}=\frac{sinB}{6}$

$sinB=0.75$

$angle B = 48.6$

Another angle will be

$angle B' = 180-48.6 = 131.4$

considering angle B, angle C = $180 - (48.6+30)=101.4$

considering angle B', angle C' = $180-(131.4+30)=18.6$

$\frac{sinA}{a}=\frac{sinC}{c}$

$\frac{sin30}{4}=\frac{sin101.4}{c}$

$c = 7.84$

Similarly, finding c'

$\frac{sinA}{a}=\frac{sinC'}{c'}$

$\frac{sin30}{4}=\frac{sin18.6}{c'}$

$c'=2.55$

Hence two triangles are possible with below details: : Answer

A = 30, B = 48.6, C = 101.4, c = 7.84

A = 30, B' = 131.4, C' = 18.6, c' = 2.55

Hope it will help :)

5 0

2 years ago

Its

damaskus [11]

Answer:

$P(Green\ and\ Green) = \frac{25}{144}$

Step-by-step explanation:

Given

$Green=5$

$Blue = 7$

Required

$P(Green\ and\ Green)$

This is calculated as:

$P(Green\ and\ Green) = P(Green) * P(Green)$

Since, it is a probability with replacement, we have:

$P(Green\ and\ Green) = \frac{Green}{Total} * \frac{Green}{Total}$

So, we have:

$P(Green\ and\ Green) = \frac{5}{12} * \frac{5}{12}$

$P(Green\ and\ Green) = \frac{25}{144}$

5 0

2 years ago

How many pieces of 4 <br> inches of ribbon can get from a roll of 25 feet ribbon?

Dovator [93]

1 feet = 12 inches

25 feet= 25*12 inches
25 feet=300 inches
300inches/4inches=75 pieces of ribbon

8 0

2 years ago

Read 2 more answers