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erica [24]
3 years ago
5

If x=2y=4z, express

Mathematics
1 answer:
Umnica [9.8K]3 years ago
8 0
x = 4z

2y = 4z

Dividing both sides by two,

y = 2z

OK, part 1.

x+4y+z = 4z + 4(2z) +z = 13z

When z=2 then x+4y+z =13(2)=26

Part 2.

2x+3y+2z= 2(4z) +3(2z) + 2z = 16z

When z=2 then 2x+3y+2z=16(2)=32


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2m divided by 3/9; m = 3/2
11Alexandr11 [23.1K]

Answer:

Not completely sure but I think 9

Step-by-step explanation:

In order to solve this equation, you would need to first multiply m by 2 to get 2 m. 3/2=1.5; 1.5*2 =3. 3/9 simplifies to 1/3

Then you would want to solve. So, you would need to divide 2 by 1/3 which would give you 9.

8 0
3 years ago
Hey can you please help me posted picture of question
shepuryov [24]
The correct answer is option C.

The solution is shown below:

(8 - 3i)(6 + 5i)

= 8(6 +5i) - 3i(6 + 5i)

= 48 + 40i - 18i - 15i²

= 22i + 48 - 15(-1)

= 22i + 48 + 15

= 22i + 63

= 63 + 22i
6 0
3 years ago
Is y=-½x+2 perpendicular to -2x+1​
BartSMP [9]

Answer:

i think no sorry if im whrong

3 0
3 years ago
To download movies off the internet, you must pay $1.99 per movie, plus a onetime fee of $5.50. Which expression shows the total
daser333 [38]

There's no expressions shown

7 0
3 years ago
Read 2 more answers
Suppose a large shipment of telephones contained 21% defectives. If a sample of size 498 is selected, what is the probability th
grandymaker [24]

Answer:

P(-3\% < x < 3\%) = 0.901

Step-by-step explanation:

Given

p = 21\%

n = 498

Required

P(-3\% < x < 3\%)

First, we calculate the z score

z = \sqrt{p * (1 - p)/n}

z = \sqrt{21\% * (1 - 21\%)/498}

z = \sqrt{21\% * (79\%)/498}

z = \sqrt{0.1659/498}

z = \sqrt{0.000333}

z = 0.0182

So:

P(-3\% < x < 3\%) = P(-3\%/0.0182 < z

P(-3\% < x < 3\%) = P(1.648 < z

From z probability, we have:

P(-3\% < x < 3\%) = 0.901

6 0
3 years ago
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