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3 years ago

is it easier to subtract when the numbers are written above and below each other? explain your answer

2 answers:

3 0

Usually its easier to subtract numbers written vertically because of the sheer fact that you're just taking away instead of adding on. If you have basic idea about adding then you should understand subtracting easier. But, because most schools teach adding first its easier for some.

LenKa [72]3 years ago

3 0

Yes it is, if you have a problem like 34,789 - 28,058 it would be much easier to put 28,058 under 34,789 and subtract it vertically rather than trying to subtract it mentally. Obviously subtracting numbers vertically only works with numbers with 2 digits or more.

Hope this helps :)

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Which set of transformations would prove triangle GFE ~ triangle GHI?

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Answer:

Dilation of 1/2 and then a reflection over y=2

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3 years ago

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Given the graph of a line y=−x. Write an equation of a line (there are many) which intersects the line, but is not perpendicular

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This would be any equation whose slope isn’t -1 or 1.

If the slope was -1, the lines would be parallel because the have the same slope.

If the slope was 1, the lines would be perpendicular because 1 is the negative reciprocal of -1.

Any line with any other slope will intersect with y=-x.

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3 years ago

Select all expressions that represent a correct solution to the equation 6(x+4)=20

Sergeeva-Olga [200]

Answer:

D. 20 ÷ 6 − 4

E. 1/6(20 − 24)

F. (20−24) ÷ 6

Step-by-step explanation:

6(x + 4) = 20

6(x) + 6(4) = 20

6x + 24 = 20

- 24 - 24

6x = -4

/6 /6

x = -4/6 or x = -2/3

D. 20 ÷ 6 − 4

20/6 - 4

20/6 - 24/6

-4/6 = -2/3

E. 1/6(20 − 24)

1/6(-4)

-4/6 = -2/3

F. (20 − 24) ÷ 6

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2 years ago

Due to conservation efforts, the gray whale has been removed from the endangered species list. There are now 13,000 in the world

brilliants [131]

Answer:

$P = 13,000(1.11) ^ t$

Step-by-step explanation:

This scenario can be modeled using an exponential growth equation.

The exponential growth equations have the following form:

$P = p (1 + r) ^ t$

Where P is the population in year t

p is the initial population at t = 0

r is the growth rate

t is the time in years.

In this case we know that the current population is 13,000 and that the growth rate is 11%

$p = 13,000\\r = 0.11$

The equation that models this scenario is:

$P = 13,000(1 + 0.11) ^ t$

$P = 13,000(1.11) ^ t$

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3 years ago

a soccer coach gives each player 1/2 liter of water at halftime. if there are 11 players how many liters does he need

Vitek1552 [10]

Answer:

1 player =1/2 liter

11 players=X

1/2x11

16,5

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2 years ago

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