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WITCHER [35]
3 years ago
12

What is the standard for of (1 7i)(3-i)?

Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0
3 -1i + 21i -7i2 now you have to fix the last factore because you have to change the imaginery i this would give you the answer of 3 - 1i + 21i +7 now add common factor which would give you the final answer of 3 +20i +7
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The velocity of a car was 30m/s when the driver pushed the brake of the car and it stopped after 2 seconds. Assume that the acce
Murljashka [212]

Answer:

the "acceleration" is -15m/s (it's negative because it is slowing down, not speeding up[it might just be a positive 15m/s if it is called deceleration and not acceleration])

Step-by-step explanation:

30m/s (starting speed)/2 (the number of seconds it took to stop from 30m/s

3 0
3 years ago
Kath starts with a number. she adds 3 to her number then double the result. finally, she subtracts 7. if she ended with 9, what
Dimas [21]
The answer is 5. Work backwards: first add 7 to 9, then divide by 2, then subtract 3.

9+7=16
16/2=8
8-3=5

Cross Check:
5+3=8
8*2=16
16-7=9

Final Answer: 5
4 0
3 years ago
Is this right??<br><br> 313.65 x 0.9 = 282.285x
yan [13]
Yes Your Answer Is In Fact 282.285  :)
5 0
3 years ago
How can you use doubles when multiplying with 4 to find 4x8
pshichka [43]
4 = 2 * 2

Multiplying by 2 is the same a doubling.
Since 4 is 2 * 2, to multiply a number by 4, double the number twice.

Example:
What is 4 * 100?
Double 100 to get 200.
Double 200 to get 400.
Therefore, 4 * 100 = 400.
By doubling twice, we do the same as multiplying by 4.
4 0
3 years ago
Does 5=5 and n=4 have no solutions, 1 solution or infinite solutions
IrinaK [193]

−5(z+1)=−2z+10

one solution

7 0
3 years ago
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