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ycow [4]
2 years ago
14

Subtract. (2 + 5i) – (4 – 2i)

Mathematics
2 answers:
jeka57 [31]2 years ago
5 0

Answer:

7i - 2

Step-by-step explanation:

(2 + 5i) - (4 - 2i)

2 + 5i - 4 + 2i

2 - 4 + 7i

7i + 2 - 4

7i - 2

Assoli18 [71]2 years ago
3 0

Answer:

3i-2

Step-by-step explanation:

I am not sure it could also be, well I don't know.

Hopefully its correct, sorry if it not.

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<h2>2/5 </h2>

Step-by-step explanation:

<h2>Hope it help & study well</h2>
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3 years ago
The probability of choosing a penny from the 1980s from the bag of pennies without looking is StartFraction 3 over 40 EndFractio
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Unlikely

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2 years ago
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The Length of a standard jewel case is 7cm more than its width. The area of the rectangular top of the case is 408cm. Find the l
salantis [7]

Answer:

The length of the case is 24 cm and its width is 17cm.

Step-by-step explanation:

The Length of a standard jewel case is 7cm more than its width.

Let the length be represented by L and the width be represented by W, this means that:

L = 7 + W

The area of the rectangular top of the case is 408cm². The area od a rectangle is given as:

A = L * W

Since L = 7 + W:

A = (7 + W) * W = 7W + W²

The area is 408 cm², hence:

408 = 7W + W²

Solving this as a quadratic equation:

=> W² + 7W - 408 = 0

W² + 24W - 17W - 408 = 0

W(W + 24) - 17(W + 24) = 0

(W - 17) (W + 24) = 0

=> W = 17cm or -24 cm

Since width cannot be negative, the width of the case is 17 cm.

Hence, the length, L, is:

L = 7 + 17 = 24cm.

The length of the case is 24 cm and its width is 17cm.

4 0
3 years ago
Yesterday, there were 17 problems assigned for math homework. Monica got 17 out of 17 problems correct. What percentage did Moni
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Answer:

100%

Step-by-step explanation:

17/17 is 100

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3 years ago
Nina saves 40% of her summer job earnings for college. This summer, she earned $200 more than last summer, and she saved $900. W
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Answer:

(900 ÷ 4) x 10 -200 = 2050 And this will equal last Summer's earnings

Step-by-step explanation:

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Therefore:

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3 0
3 years ago
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