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3 years ago

A and b are odd numbers.

Mathematics

2 answers:

stepladder [879]3 years ago

8 0

Answer:

2(3+7)=20 and 20 is a multiple of 4

Step-by-step explanation:

4 times 5 equals 20, which makes it a multiple of 4

3 and 7 are both odd, and added together get 10. Times that by 2 and you get 20

Ksenya-84 [330]3 years ago

3 0

Answer:

let a=3 and b=5

2(a+b) then

2(3+5)=16

16 is a multiple of 4

Step-by-step explanation:

Any two odd numbers added together make an even number.

Any even number multiplied by 2 is divisible by 4

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Name two lines in the diagram.

Oksanka [162]

Answer:

Options (3) and (6)

Step-by-step explanation:

"A straight line is a set of all points between two points and extending beyond these points."

Therefore, from the given diagram,

Arrows connecting set of two points B and C and D and E will be straight lines.

Geometrically we denote them with an arrow over the line.

$\overleftrightarrow {BC}$ and $\overleftrightarrow {DE}$

Therefore, Options (3) and (6) will be the answer.

6 0

3 years ago

Which of the following below is a function?

ohaa [14]

Answer:

i don't know sorry

Step-by-step explanation:

6 0

2 years ago

Who would be interested in using inequalities? What are the benefits

Troyanec [42]

I would be interested, they help because they allow you to see how much you can use for whatever it is you need. An example would be how much money you can spend per month to still have enough for your bills

4 0

3 years ago

A metallurgist has one alloy containing 34% copper another containing 48% copper. How many pounds of each alloy must he use to m

Zielflug [23.3K]

Answer:

<h2>36.14 pounds of 34% copper alloy and 9.86 pounds of 48% copper alloy</h2>

Step-by-step explanation:

First alloy contains 34% copper and the second alloy contains 48% alloy.

We wish to make 46 pounds of a third alloy containing 37% copper.

Let the weight of first alloy used be $x$ in pounds and the weight of second alloy used be $y$ in pounds.

Total weight = $46\text{ }pounds=x+y$ $-(i)$

Total weight of copper = $37\%\text{ of 46 pounds = }34\%\text{ of }x\text{ pounds + }48\%\text{ of }y\text{ pounds }$

$\dfrac{37\times 46}{100}=\dfrac{34x}{100}+\dfrac{48y}{100}\\\\ 34x+48y=1702$ $-(ii)$

Subtracting 34 times first equation from second equation,

$34x+48y-34x-34y=1702-34\times46\\14y=138\\y=9.857\text{ }pounds \\x=36.143\text{ }pounds$

∴ 36.14 pounds of first alloy and 9.86 pounds of second alloy were used.

5 0

3 years ago

If x=z+8 where z varies inversely as y and z=2 when y=3 find relation between y and x?

sattari [20]

Answer:

y = 6/(x - 8).

Step-by-step explanation:

z = k/y where k is a constant

2 = k/3

k = 6.

So z = 6/y

and x = 6/y + 8

Multiply through by y:

xy = 6 + 8y

xy - 8y = 6

y(x - 8) = 6

y = 6/(x - 8)

5 0

2 years ago