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Oksana_A [137]
3 years ago
7

Find the quotient of (5+2i)(6-4i)/(2+i)

Mathematics
1 answer:
Olin [163]3 years ago
6 0
The answer is 68/5 - 54/5i
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An automobile manufacturer claims that its van has a 39.0 miles/gallon (MPG) rating. An independent testing firm has been contra
Marrrta [24]

Answer:

The test statistic is -1.00

Step-by-step explanation:

Test statistic (Z) = (sample mean - population mean) ÷ sd/√n

sample mean = 38.8miles/gallon, population mean = 39miles/gallon, sd = 2.2miles/gallon, n = 120vans

Z = (38.8 - 39) ÷ 2.2/√120 = -0.2 ÷ 2.2/10.95 = -0.2 ÷ 0.20 = -1.00 (to 2 decimal places)

6 0
4 years ago
marie hikes at a rate of 2 miles per hour if she hiked for 6 and 2/5 hours how many miles will she hike
hram777 [196]

Well, for this question we can start off by making an equation

(6.4)2

This problem is quite simple actually so we will just multiply 6.4*2

6.4*2=12.8 miles

5 0
3 years ago
Mr. Weber drives to a landscape supply center to buy sand and gravel. He needs at least 2 lb of sand. The amount of gravel he wi
faltersainse [42]

The answers are (2 1/2, 10) and (3, 12)

//I just took the test and these were the answers

3 0
3 years ago
Read 2 more answers
12x -20=n (3x-5)<br><br> I need help I don’t get it please help me.
Salsk061 [2.6K]

Answer:

The value of n = 4 and  

The value of x = \frac{5}{3}

Step-by-step explanation:

Method I:

As given, 12x -20=n (3x-5)      .........(1)

Firstly , take 12x - 20

As 12x - 20 can be written as 4(3x - 5)

∴ equation (1) becomes

4(3x - 5) = n (3x-5)

Divide the equation by (3x-5) , we get

4 = n

Method II:

As given, 12x -20=n (3x-5)

⇒12x - 20 = 3nx - 5n

⇒12x - 3nx = 20 - 5n

⇒3x(4 - n) = 5( 4 - n)

Divide the equation by (4-n) , we get

3x = 5

⇒ x = \frac{5}{3}

∴ we get

n = 4 and  x = \frac{5}{3}

Now, check that value of n and x satisfies the equation or not

12(\frac{5}{3}) - 20 = 4( 3(\frac{5}{3}) - 5)

⇒4(5) - 20 = 4(5 - 5)

⇒20 - 20 = 4(0)

⇒ 0 = 0

Hence , we get

The values of x and n satisfies the equation

so, we get

n = 4 and  x = \frac{5}{3}

5 0
3 years ago
Please help!!!!!!!!!!!!!!!!!!
blagie [28]

Answer: C. 1,485 cubic feet

Step-by-step explanation:

Ur welcome :)

8 0
3 years ago
Read 2 more answers
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