H(n) = n^2 - 4n; Find h(-3)

Mathematics

2 answers:

k0ka [10]3 years ago

7 0

For this case we have the following function:

$h (n) = n ^ 2-4n$

We must find the value of the function when $n = -3$ .

Substituting we have:

$h (-3) = (- 3) ^ 2-4 (-3)$

We must bear in mind that the law of multiplication signs complies:

$- * - = +$

So:

$h (-3) = 9 + 12\\h (-3) = 21$

Answer:

$h (-3) = 21$

Vladimir79 [104]3 years ago

3 0

Answer:

h(-3)= (-3)^2 - 4(-3)

9+12= 21

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alexandr402 [8]

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4 years ago

Read 2 more answers

The diagram below gives the dimensions of a swimming pool. 18 ft , 20ft, 36ft (c) What is the total area of the swimming pool? E

WARRIOR [948]

The picture in the attached figure

Part 1) <span>What is the total area of the swimming pool?
</span>
we know that
<span>area of the swimming pool=area rectangle-area semi circle

area rectangle=20*36-----> 720 ft</span>²

area semicircle=pi*r²/2
r=18/2----> 9 ft
area semicircle=pi*9²/2----> 127.17 ft²

area of the swimming pool=720 ft²-127.17 ft²----> 592.83 ft²

the answer Part 1) is
The area of the swimming pool is 592.83 ft²

Part 2) <span>What is the perimeter of the swimming pool?
</span>
perimeter of the swimming pool=perimeter of rectangle-18 ft+perimeter semi circle
perimeter of rectangle=2*[20+36]---> 112 ft

perimeter semi circle=2*pi*r/2----> pi*r
r=9 ft
perimeter semi circle=pi*9----> 28.26 ft
so
perimeter of the swimming pool=112 ft-18 ft+28.26 ft----> 122.26 ft

the answer Part 2) is
122.26 ft