The cost for 12 square feet is $51.
An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Cost for 16 square feet = $68
Now,
The cost for 12 square feet.
= 12 x (68/16)
= 3 x 68/4
= 3 x 17
= $51
Thus,
The cost for 12 square feet is $51.
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Answer:
its negative 27.1 (-27.1)
Step-by-step explanation:
Answer:
Hence, the normal price of each cookie= $ 1.15.
Step-by-step explanation:
Cookies are on sale!
Today each cookie costs $0.75 less than the normal price.
So let c be the normal price of one cookie.
Hence, today 1 cookie will cost= $ (c-0.75)
Right now if you buy 7 of them it will only cost you $2.80!
Hence,
cost of 7 cookie= 7×(c-0.75)
This means that:
7×(c-0.75)=2.80
i.e. 7c-7×0.75=2.80
⇒ 7c-5.25=2.80
⇒ 7c=0.80+5.25
⇒ 7c=8.05
dividing both side by 7 we get:
c=1.15
Hence, the normal price of each cookie= $ 1.15.
has an inner diameter of
2.7 cm and an outer
diameter of 3.6 cm. If the
density of stainless-steel
is 8 g/cm3, what is the
mass of the fitting?
Subtract the volume of the inside diameter from the volume of the outside diameter and then multiply that by the density.
Volume of outside:
PI x 1.8^2 x 3.9 = 39.67704 cubic cm
Volume of inside:
PI x 1.35^2 x 3.9 = 22.318335 cubic cm
Difference: 39.67704 - 22.318335 = 17.358705 cubic cm.
Mass = 17.358705 x 8 = 138.86964 grams. Round the answer as needed.