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Zepler [3.9K]
2 years ago
6

Solve 2x2 − 12x + 20 = 0. 3 ± i 3 ± 2i 1 ± 2i 2 ± 3i

Mathematics
1 answer:
makkiz [27]2 years ago
7 0
This is the concept of quadratic equations, solving the equation 2x^2-12x+20=0 using the formula we get:
x=[-b+/-sqrt(b^2-4ac)]/(2a)
from our equation, a=2,b=-12 and c=20
x=[-(-12+/-sqrt((-12)^2-4*2*20)]/(2*2)
x=[12+/-sqrt(144-160]/4
x=[12+/-sqrt(-16)]/4
x=[12+/-4i]/4
x=[3+\-i]
the answer is A] 3+/-i
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Shannon scores 36 points on 6 questions on her test what is the unit rate for one question?
VLD [36.1K]

Answer:

Uh I think 6

Step-by-step explanation:


7 0
3 years ago
Find the area of an equilateral triangle that has perimeter of 24 m. ​
mafiozo [28]

we know the perimeter is 24, and is an equilateral triangle, so it has three equal sides, so each side is 24 ÷ 3 = 8.

\bf \textit{area of an equilateral triangle}\\\\ A=\cfrac{s^2\sqrt{3}}{4}~~ \begin{cases} s=side's\\ \qquad length\\ \cline{1-1} s = 8 \end{cases}\implies A=\cfrac{8^2\sqrt{3}}{4}\\\\\\ A=16\sqrt{3}\implies A\approx 24.71

6 0
3 years ago
3 Points
jolli1 [7]

Answer:55555

Step-by-step explanation:3 Points

Dawn's credit card has an APR of 15%, calculated on the previous monthly

balance, and a minimum payment of 2%, starting the month after the first

purchase. Her credit card record for the last 7 months is shown in the table

below.

End of

month

Previous

balance

50.00

51700.00

$1687 25

$1674 60

$1662 04

$1649.57

51637 20

New

charges

$1700 00

50.00

50 00

50.00

50.00

Payment

received

$0.00

$34 00

533 75

533 49

$3324

$32.99

$32.74

Finance

charges

50.00

521 25

$21 09

$20.93

$20.78

520 62

$20.46

Principal

paid

$0.00

$12.75

$1265

$12.56

$1247

$12.37

$1228

New

balance

$1700.00

$1687 25

51674 60

S1662 04

$1649 57

S1637 20

S1624 92

50.00

50.00

How much of the initial purchase has Dawn paid off over the 7 months?

Answer:



Step-by-step explanation:



8 0
3 years ago
Ian's parents asked him to creat a budget for his $ 1,000 monthly income . He determines that he would like to save the remainin
Kay [80]

35%

First, we need to find the amount of money that is being spent. Add all of the amounts together.

$350 + $100 + $120 + $80

$450 + $120 + 80

$570 + $80

$650

So, Ian spends $650 of his budget each month. How much does that leave for savings? Just subtract $650 from $1,000 to find that he saves $350 each month.

Now, you just need to find the percentage. The percentage is the same as the numerator in a fraction with a denominator of 100, so x% = x/100. For example, 1% = 1/100. $350 / $1000 = x / 100

How do we turn 1,000 into 100? Divide it by 10. And if you do something to the denominator of a fraction, you have to do it to the numerator as well. So, divide $350 by 10 and divide $1000 by 10, leaving you with $35 / $100 = x / 100

Multiply both sides by 100 to get x by itself. This leaves you with 35 = x, so 35% of Ian’s budget with go towards saving.

4 0
3 years ago
4 Sheila buys 200 shares of stock at $18.25 per share and sells them at $32.50 per
JulsSmile [24]

Answer:

Step-by-step explanation:

If Sheila buys

200 shares for 18.25

200*18.25==3650

she sells them for

200*32.50=6500

her profit is

6500-3650=2850.00

another way to solve this would be

32.50-18.25=14.25

14.25*200=2850

7 0
2 years ago
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