Asked by Jon

1)Find the value of 7+2(5-2*3^2)

7+2(5-2*9)
7+2(5-18)
7+2(-13)
7+-26
(answer)-19

2)Name the sets of numbers to which 457 belongs.

(answer)natural,whole,integers,rational,reals
Answered by blueridge
We have this:

7 + 2(5 - 2 * 3 ^ 2)

USE PEMDAS...Do you know what PEMDAS stands for?

Work out the inside of the parentheses first.

Inside we have this guy:

5 - 2(3)^2

5 - 2(9)

5 - 18

-13

We now have this:

7 + 2(-13)

7 - 26 = -19

Done!

=================

NEXT:

Name the sets of numbers to which 457 belongs.

457 belongs to the following family of numbers:

natural
whole
intergers
real numbers

I have doubt about rational.

Rational numbers are basically fractions.

Unless you meant to type 0.457, did you?

In other words, if a number can be written as a decimal (a decimal is basically a fraction) that either repeats forever or simply ends (called a terminating decimal), then the number is RATIONAL.

Can 457 be expressed as decimal number?

NO, it cannot!

This is why I doubt that the family of numbers above includes rational for 457.

See my point?



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