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Makovka662 [10]
3 years ago
14

When you multiply (3+6i)(3+7i) you get an answer of the form a+bi. Find a.

Mathematics
1 answer:
stiks02 [169]3 years ago
5 0

(3 + 6i)(3 + 7i)

FOIL: First, Outside, Inside, and Last

3 x 3 = 9

3 x 7i = 21i

6i x 3 = 18i

6i x 71= 42i

9 + 21I + 18I + 42I = 9 + 81I

a = 9

B = 81I

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Lowest common denominator of 3 5/7 and 4 4/5
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Answer: look at the screenshot

Step-by-step explanation:

it has everything you need

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2 years ago
PLEASE! WILL GIVE METAL AND FAN.
Pani-rosa [81]
20000*0.45 = 9000 in the bond
20000*0.15 = 3000 in the CD
20000*0.20 = 4000 in stocks
20000*0.029 = 580 in savings

A=9000(1 + 4.35%)^3 = 10,226.33
A=3000(1 + 2.90%)^3 = 3,268.64
A=4000 (1 + 8%) x (1 - 4%) x (1 + 6%) = 4,396.03
A=580(1 + 4.35%)^3 = 4,545.04
Total value = 22,436.04
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6 0
3 years ago
Read 2 more answers
At 5 p.M., the temperatures recorded at two weather stations in Antarctica are -6 degrees and 2 degrees. The temperature changes
RoseWind [281]

Answer:

- 8° per hour

Step-by-step explanation:

Given that:

Station A = - 6°

Station B = 2°

Rate of temperature change = x° / hour ; which is the same at both stations

Temperature at station A 3 hours after the recording is the same as the temperature in station B 4 hours after the recording ;

Temperature change in Station A:

-6 + 3x

Temperature change in station B:

2 + 4x

Temperature change in A = temperature change in B

-6 + 3x = 2 + 4x

Collect like terms

3x - 4x = 2 + 6

- x = 8

x = - 8

Hence, the rate of temperature change x in both stations is - 8° per hour

8 0
3 years ago
Forty students are In Science club. Of those 45% are girls. This percent increase 56% after new girls join the club. How many ne
stepan [7]
45% of 40 is 0.45×40=18 girls
if x girls join then 56% of 40+x is 0.56(40+x)=18+x
22.4+0.56x=18+x
put together like terms
4.4=0.44x
<span>x=10 girls joined</span>
8 0
3 years ago
Salid bought 35 feet of window trim at a hardware store the trim cost 1.75 pet foot including sales tax if salid paid 100.00 bil
skad [1K]

Answer: Salid should get $38.75 of change.

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

  • <em>Quantity of window trim bought: 35 feet </em>
  • <em>Cost per feet: $1.75 </em>
  • <em>Amount paid: $100 </em>

First, we have to calculate the total cost, by multiplying the Quantity of window trim bought (35) by the price per feet (1.75)

35 x 1.75 = $61.75

Finally, to calculate the change that Salid should get, we have to subtract the total cost (61.75) to the amount paid (100)

100-61.75=$38.75

6 0
3 years ago
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