While christine was visiting her sister in ashland she bought a microscope that was marked down 60% from the original price of 75$. if the sales tax in ashland is 10% what was the total cost of the microscope?

The total cost of the microscope=$37.50

Step-by-step explanation:

Step 1: Get the discount amount

Discount amount=Discount rate×original price

where;

original price=$75

discount rate=60%

replacing;

Discount amount=(60/100)×75=45

Discount amount=$45

Step 2: Calculate sale price

The sale price can be calculated as;

sale price=Original price-discount amount

where;

discount=$45

original price=$75

replacing;

Sale price=(75-45)=$30

Step 3: Calculate tax amount

Tax=10% of original price=(10/100)×75=7.5

Step 4: Total cost of microscope

Total cost=sale price+tax

where;

sale price=30

tax=7.50

replacing;

Total cost=(30+7.50)=37.50

The total cost of the microscope=$37.50

x= -3

step-by-step explanation:

step 1: simplify brackets

4 - x - 1 = 6

step 2: simpilfy

3 - x = 6

step 3: subtract 3 from both sides

-x = 6 - 3

step 4: simpilfy 6 - 3

-x = 3

step 5: multiply both sides by -1

x = -3

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.