Question 2. I give thanks and 5 stars :D

Answer:

$2.50

Step-by-step explanation:

This problem is asking for the unit rate. To solve this problem, you would do $12.50 divided by 5 to get $2.50.

$12.50 divided by 5 = $2.50

Answer:

$2.50

Step-by-step explanation:

To get this answer you need to divide 12.50 divided 5. When you do this you will get $2.50.

Answer:

Option A and C is correct.

Step-by-step explanation:

Discount is defined as a reduced price on something being sold or at a price lower than that item is normally sold for.

For a 20% discount,

Given:

Initial prices = $ d

Discounted price = % discount × original/initial cost

= 20/100 × d

= 0.2 × d

Selling price = original cost - discounted price

= d - 0.2d

= 0.8 × d

= 0.8d

Answer:

A: Yes

B:No

C: Yes

D: No

Step-by-step explanation:

I got 100% on the test with this question. Trust me.

Recurring decimals such as 0.26262626…, all integers and all finite decimals, such as 0.241, are also rational numbers. Alternatively, an irrational number is any number that is not rational. ... For example, the square root of 2 is an irrational number because it cannot be written as a ratio of two integers.

Worked Examples

1 - recognize Surds

A surd is a square root which cannot be reduced to a whole number.

For example,

4–√=2

is not a surd, because the answer is a whole number.

Alternatively

5–√

is a surd because the answer is not a whole number.

You could use a calculator to find that

5–√=2.236067977...

but instead of this we often leave our answers in the square root form, as a surd.

2 - Simplifying Surds

During your exam, you will be asked to simplify expressions which include surds. In order to correctly simplify surds, you must adhere to the following principles:

ab−−√=a−−√∗b√

a−−√∗a−−√=a

Example

(a) - Simplify

27−−√

Solution

(a) - The surd √27 can be written as:

27−−√=9–√∗3–√

9–√=3

Therefore,

27−−√=33–√

Example

(b) - Simplify

12−−√3–√

Solution

(b) -

12−−√3–√=12−−√∗3–√=(12∗3)−−−−−−√=36−−√

36−−√=6

Therefore,

12−−√3–√=6

Example

(c) - Simplify

45−−√5–√

Solution

(c) -

45−−√5–√=45/5−−−−√=9–√=3

Therefore,

45−−√5–√=3