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3 years ago

Please give me the answer and show me how you solved it

Mathematics

1 answer:

Yuri [45]3 years ago

4 0

Answer:

Option 1: -8c^8

Step-by-step explanation:

We multiply the numbers by the numbers, then the variables times the variables.

-2 times 4 gives us -8

c^3 times c^5 = c ^8. When multiplying a variable with exponents, you add the exponents.

You only multiply the exponents when it's something like (c^3)^5

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A blender that normally costs $ 130 is on sale for 12 % off. What is the final cost of the blender if there is also an 8 % sales

ludmilkaskok [199]

Answer:

The final price of blender after sale off and sales tax = $123.552 A

Step-by-step explanation:

Given as :

The costs of blender = $130

The sale off percentage = 12%

The sales tax applied on blender price = 8%

Now

The cost of blender after sale off = $130 - 12% of $130

The cost of blender after sale off = $130( $\frac{100 - 12}{100}$ )

I.e The cost of blender after sale off = $130 × $\frac{82}{100}$ = $114.4

Again, sales tax of 8% is applied after sale off

So, Final price of blender = $114.4 + 8% of $114.4

Final price of blender = $114.4 ( $\frac{108}{100}$ )

I.e Final price of blender = $123.552

Hence the final price of blender after sale off and sales tax = $123.552 Answer

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3 years ago

Roy is twice as old as Joan, and in 3 years the sum of their ages will be 21 years. Find their present ages.

Lisa [10]

Answer:

Roy is 10 years old at present and Joan is 5 years old at present

Step-by-step explanation:

Let

x----> Roy's age

y----> Joan's age

we know that

x=2y ----> equation A

(x+3)+(y+3)=21 ----> equation B

substitute equation A in equation B

(2y+3)+(y+3)=21

solve for y

3y+6=21

3y=21-6

3y=15

y=5 years

Find the value of x

x=2y ----> x=2(5)=10 years

therefore

Roy is 10 years old at present

Joan is 5 years old at present

8 0

3 years ago