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3 years ago

What is the best estimate for each expression?

Mathematics

1 answer:

sasho [114]3 years ago

4 0

yo sup??

1/8+2/5=5+16/40=21/40=1/2 (approx)

13/14-1/10=130-14/140=116/140=0 (approx)

1/12+1/20=5+3/60=8/60=0.133=0 (approx)

I hope its correct...fingers crossed.

Hope this helps.

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Share 264 in the ratio 2:3:1

NikAS [45]

Answer:

88:132:44

Step-by-step explanation:

Divide 264 by 6 (2+3+1) = 44

2*44=88

3*44=132

1*44=44

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In Argentina, a cow on a ranch is expected to need an average of 4200 m2

nika2105 [10]

The cows of Argentina needs an approximate area of 4200 m² for grazing, and there is a total of 4500 cows.

And we are asked to find the total area of their grazing but in hectares. So, we can write:

$1 \: cow = 4200 \: {m}^{2}$

Then, for 4500 cows:

$4500 \: cows = 4200 \: {m}^{2} \times 4500$

$4500 \: cows = 18900000 \: m {}^{2}$

We know that, 1 hectares = 10000 m² = 10⁴ m²

Then let the area of the field be x in hectares:

$1 \: hectare = 10000 \: {m}^{2}$

$x \: hectare = 18900000 \: {m}^{2}$

Then, putting them in proportion, We will get:

$x = \dfrac{18900000}{10000} hectares$

$x = \boxed{ 1890 \: hectares}$

So, the total area in hectares = 1890 hectares.

And we are done !!

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3 years ago

Identify each matrix A such that A^2 has identical diagonal elements?

Maksim231197 [3]

Answer:

The correct matrices are:

Matrix:

7 1 5

1 5 7

5 7 1

all diagonal elements of A^2 are: 7^2 + 1^2 + 5^2

Matrix:

9 18 27

27 -9 18

18 27 9

all diagonal elements of A^2 are: 9^2 + 27*18 + 18*27 or (-9)^2

Matrix:

8 1 6

6 8 1

1 6 8

all diagonal elements of A^2 are: 8^2 + 6*1 + 1*6

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3 years ago

In ten throws theo makes 4 baskets how many baskets will he make in 25 throws

grigory [225]

10 throws = 4 made baskets

20 throws = 8 made baskets

25 throws = 10 made baskets

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