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katrin [286]
3 years ago
12

10(4 - 3i ) = 1) 40-3i 2) 40-30i 3) 40+30i

Mathematics
2 answers:
dusya [7]3 years ago
4 0
10(4-3i)
=10*4-10*3i
=40-30i

Open the bracket by multiplying each term by 10
love history [14]3 years ago
3 0
2 because 10×4 is 40 and -3i×10 is -30i making it 40-30i
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2 years ago
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Trapezoid ABCD has an area of 525 cm squared. If height AB = 21 cm and BC = 37 cm, what is the measure of AD?​
Annette [7]

Answer:

AD = 13

Step-by-step explanation:

Area of trapezoid ABCD

=  \frac{1}{2} (AB + AD) \times AB \\  \\  525=  \frac{1}{2} (37+ AD) \times21\\  \\  525 \times 2=  (37+ AD) \times21 \\  \\ 1050 = 21 \times 37 + 21AD \\  \\ 1050  = 777+ 21AD \\  \\  21AD  = 1050 - 777 \\  \\ 21AD  = 273 \\  \\ AD  =  \frac{273}{21}  \\  \\ AD  = 13

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2 years ago
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vredina [299]

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116

Step-by-step explanation:

5 0
2 years ago
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zubka84 [21]
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3 years ago
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