What is rational or irrational

2 answers:

kondor19780726 [428]3 years ago

3 0

A rational number is a number that you can be written as a ratio and a irrational number is a real number that cannot be written as a ratio or integer as a fraction.

Blizzard [7]3 years ago

3 0

Rational numbers can be written in form
a/b whre b is not zero
just fyi, repeating decimals are rational example
0.3333333. means 1/3
if there is a repeating part, there is a fraction for it

irrational numbers cannot be written in a/b
they have no repeating parts, and go on infintely
famous exampes are π and e and √2

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Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy

tia_tia [17]

Answer:

84 ounces of pure gold

Step-by-step explanation:

Jess has 60 ounces of an alloy that is 40% gold. How many ounces of pure gold must be added to this alloy to create a new alloy that is 75% gold?

Pure gold = 100% gold

Let the number of ounces of pure gold = x

Hence, we have the equation

40% × 60 ounces + 100%× x ounces = 75%(60 + x)ounces

= 0.4 × 60 + 1x = 0.75(60 + x)