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Maksim231197 [3]
2 years ago
9

Simplify expression 2i(4.5-20i)3i

Mathematics
1 answer:
Margaret [11]2 years ago
3 0

Answer:

-27+120i

Step-by-step explanation:

that is the answer

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Question Progress Homework Progres 23/2 Solve the quadratic equation 3x + x-5 = 0 Give your answers to 2 decimal places.​
kykrilka [37]

The value of x is 1.14 or x = -1.47

We find the value of x in the quadratic equation 3x^2 +x-5=0

Using the formula: (-b ± √ (b²- 4 a c)) / (2a)

Where the value of a = 3, b = 1 and c = -5

Substituting the above values (a = 3, b = 1 and c = -5)

in the formula:

(-1 ± √ (1²- 4 3 (-5))) / (2*3)

= (-1 ± √ (1+60)) / (6)

= (-1 ± √ (61)) / (6)

= (-1 ± 7.81) / (6)

= (-1 + 7.81) / (6) or (-1 -7.81) / (6)

= (6.81) / (6) or (-8.81) / (6)

=1.135 or -1.468

Hence the value of x= 1.14 or -1.47

LEARN MORE ABOUT QUADRATIC EQUATIONS HERE: brainly.com/question/1214333

#SPJ9

3 0
1 year ago
Match each measurement with the correct unit.
makvit [3.9K]

Answer:

1. volume = L

2. length = m

3. area = m²

4. mass = kg

5. weight = lbs

6. density = g/cm³

Step-by-step explanation:

i learned this stuff

6 0
3 years ago
What is the absolute deviation of 4 in this data set?
Nana76 [90]

Answer:

n

6

Mean

11

Average Absolute Deviation (MAD)

4.6667

Step-by-step explanation:

4 0
2 years ago
Helppp and explain plzzzzzz
devlian [24]
The second one is correct. 66/300 = x/100
4 0
3 years ago
Read 2 more answers
The ratio of money in Terry's bank account to Faye's bank account was 3:7. Terry then put £220 in his account and Faye withdrew
Nadusha1986 [10]

Answer:

Terry initially had £390

Step-by-step explanation:

The ratio of the original amount is 3:7

Let the original amount Terry has be t and the original amount Faye has be f

3/7 = t/f

or simply 3f = 7t ••••••(i)

Terry putting 220 means he now has

t + 220

Faye withdrew 300

He now has f-300

These values are equal

t + 220 = f-300

f = t+220+300

f = t + 520 ••••••(ii)

Put ii into i

3(t + 520) = 7t

3t + 1560 = 7t

7t-3t = 1560

4t = 1560

t = 1560/4

t = 390

4 0
2 years ago
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