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SSSSS [86.1K]
3 years ago
10

What is the product of ( 8 – j10 ) and ( 6 + j4) in rectangular form?

Mathematics
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

b

Step-by-step explanation:

Given

(8 - j10)(6 + j4) ← expand factors using FOIL

= 48 + j32 - j60 - j²40 [ j² = - 1 ]

= 48 - j28 + 40

= 88 - j28 → b

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Extra points// mathematics
timurjin [86]

Answer:

B

Step-by-step explanation:

Givens

a = 2 sqrt(3)

b = 3 sqrt(2)

c = ?

Formula

a^2 + b^2 = c^2

Solution

  • (2sqrt(3))^2 = 2*2 * sqrt(3)*sqrt(3)
  • (2sqrt(3))^2  = 4 * 3
  • (2sqrt(3))^2  = 12
  • (3sqrt(2))^2 = 3 * 3 * sqrt(2)*sqrt(2)
  • (3sqrt(2))^2 = 9 * 2
  • (3sqrt(2))^2 = 18

(2sqrt(3)^2 + 3sqrt(2)^2 ) = c^2

4*3 + 9*2 = c^2

12 + 18 = c^2

c^2 = 30

sqrt(c)^2 = sqrt(30)

c = sqrt(30)

Answer

B

4 0
3 years ago
Read 2 more answers
What times what equals 36 and add up to 11
kotegsom [21]
9 and 4. 9*4 = 36, 9 + 4 =1 1.
8 0
4 years ago
An aquarium sells five stuffed animal sharks for $64.95. What is the cost of eight stuffed animal sharks?
Gekata [30.6K]
$103.92

Process:
64.95/5 = 12.99,  12.99 x 8 = 103.92
8 0
3 years ago
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The organic garden at a restaurant is rectangular in shape and has a perimeter of 84ft. If the length of the garden is 24ft long
ArbitrLikvidat [17]

Answer: the area of the garden is 297 ft^2

Step-by-step explanation:

The organic garden at a restaurant is rectangular in shape and has a perimeter of 84ft. This means that the total distance around the restaurant is 84ft.

Perimeter of a rectangle is expressed as 2(L + W)

L = length of the rectangle

W = width of rectangle.

Since the perimeter is 84ft

2(L + W) = 84

If the length of the garden is 24ft longer than the width of the garden, this means that

L = W + 24

Therefore

2(W +24 + W) = 84

2(2W +24) = 84

4W + 48 = 84

4W =84 - 48 = 36

W = 36/4 = 9

L = W + 24 = 9+24

L = 33 feet

Area if a rectangle is expressed as

Area = L× W

Area = 33 × 9 = 297 ft^2

5 0
4 years ago
At the amusement park each student is given $16 for food this covers the cost of $2 plus $4 for snacks how much money does the s
sweet [91]

The school expects them to spend $10 dollars.

5 0
3 years ago
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