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3 years ago

Estimate the answer to 64 x 186 21 x 98

Mathematics

2 answers:

Vikentia [17]3 years ago

8 0

Answer:

I am a bit confused on what the question is asking. But 64*186= 11904 and if we were to round that number it would be 12000. 21*98=2058 and that number rounded is 2100 or just 2000. (hope this is right and helps :D)

Step-by-step explanation:

creativ13 [48]3 years ago

8 0

When estimated it would be 12000 and 2100

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Alaska has a land area of about 1,700,000 km² Florida has a land area 1/10 the size of Alaska what is the land area Florida

ElenaW [278]

1/10 of 1,700,000 km² is 170,000 km² .

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3 years ago

What is the simplified expression for –3cd – d(2c – 4) – 4d?

kompoz [17]

–3cd – d(2c – 4) – 4d
= –3cd – 2cd + 4d – 4d
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answer
A:–5cd

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3 years ago

Simplify: 18q2−45q+25/9q2−25.

Svet_ta [14]

Answer:

$\frac{(6q-5)}{(3q+5)}$

Step-by-step explanation:

Given: $\frac{18q^{2}-45q+25 }{9q^{2}-25 }$

Factorizing the numerator and the denominator, we have:

18 $q^{2}$ - 45q + 25 = 18 $q^{2}$ - 30q - 15q + 25

= (3q - 5)(6q - 5)

and

9 $q^{2}$ - 25 = (3q - 5)(3q + 5)

So that,

$\frac{18q^{2}-45q+25 }{9q^{2}-25 }$ = $\frac{(3q-5)(6q-5)}{(3q-5)(3q+5)}$

= $\frac{(6q-5)}{(3q+5)}$

Therefore,

$\frac{18q^{2}-45q+25 }{9q^{2}-25 }$ = $\frac{(6q-5)}{(3q+5)}$

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3 years ago

Which function is the inverse of f(x) = –5x – 4?

Finger [1]

Answer:

f^(-1)(x) = \frac{-1}{5} (x+4)

Step-by-step explanation:

Given is a function

$f(x) = -5x-4\\$

To find its inverse.

We must check whether f is one to one or onto first

If -5x1-4 = -5x2-4 we get x1=x2

Hence f is one to one

Also for every f(x) we can find a x so f is onto.

So inverse exists

Let

$y=-5x-4\\-5x=y+4\\x=\frac{-1}{5} (y+4)$

Replace x by f inverse and y by x

$f^(-1)(x) = \frac{-1}{5} (x+4)$

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3 years ago

(12) — (23 + 13i) = Chc

rewona [7]

Answer:

-11 - 13i.

Step-by-step explanation:

(12) — (23 + 13i)

= 12 - 23 - 13i

= -11 - 13i.

4 0

3 years ago