All categories

3 years ago

If f(n) = n2 - n, then f(-4) is _____. -20 20 12 -12

Mathematics

2 answers:

kolbaska11 [484]3 years ago

8 0

The correct option is "20" because

f(n)=n2−n
(−4)=(−4)2−(−4)
=16+4
=20

Alekssandra [29.7K]3 years ago

5 0

Answer:

The answer is 20.

Step-by-step explanation:

The answer of this question is applying the number -4 in the equation, this is:

$f(n)=n^{2} -n\\Replacing\\f(-4)=(-4)^{2} -(-4)\\f(-4)=16+4\\f(-4)=20$

The answer is 20.

You might be interested in

A retail shop is replacing their flooring with laminate wood. The floor plan is shown below. Determine the total square feet of

Pavlova-9 [17]

Answer:

its 123 look at the immage

Step-by-step explanation:

3 0

2 years ago

Fabio and Gwen are saving money to buy a new gaming station. They need at least $510 to purchase the new gaming station. Gwen we

Phoenix [80]

Answer-

Set of constraints to model the problem are,

$12x+9y\geq 510$

$y \leq 2x$

$y \geq 25$

Solution-

x = the number of lawns weeded by Gwen,

y = the number of dogs walked by Fabio.

As, Gwen charges $12 each time she weeds a yard and Fabio charges $9 each time he walks a dog,

$\text{Earnings of Gwen} = 12x$

$\text{Earnings of Fabio} = 9y$

$\text{Total earning} = 12x+9y$

They need at least $510 to purchase the new gaming station, means they need $510 or more than $510.

The equation for this is,

$12x+9y\geq 510$

The number of dog walks that Fabio has scheduled is no more than twice the number of yards Gwen has scheduled to weed, means

y must be less than or equal to 2x.

The equation for this is,

$y \leq 2x$

Fabio will walk at least 25 dogs, means y must be greater than of equal to 25.

The equation for this is,

$y \geq 25$

8 0

3 years ago

Read 2 more answers

What is 9/14 x 2 1/3!!!!

pshichka [43]

The answer is 11
Explaination:
9/14 multiple both numbers by 3=27/42
Break 2 1/3 into 2 and 1/3
1/3 multiple both numbers but 14=14/42
27/42 x 14/42 keep number on the bottom the same
27x14= 378
Divide 378/42=9
Add the 2 from 2 1/3 to the nine
2+9=11

8 0

2 years ago

Read 2 more answers

Please help in this question. I WILL mark brainliest. NO LINKS

deff fn [24]

Answer:

B, you are correct

Area of the bigger trapezoid = (6 + 2) x 1/2 x 6 = 8 x 1/2 x 6 = 4 x 6 = 24

Area of the smaller trapezoid = (4 + 2) x 1/2 x 3 = 6 x 1/2 x 3 = 3 x 3 = 9

<h2>Area of the shaded area = 24 - 9 = 15</h2>

Hope that helps! :)

-Aphrodite

Step-by-step explanation:

6 0

3 years ago

Julie decided to grow a plant from a seed. She measured the height of her plant each day for 30 days.

k0ka [10]

The given formula is f(t) = 0.4t

They want to solve for f(10), replace t in the formula with 10"

f(10) = 0.4(10)

Multiply:

f(10) = 4 centimeters.

4 0

3 years ago