@Directrix
Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 17 feet by 17 feet by 2 inches for a patio if the concrete costs $40.00 per cubic yard?
a.
$76.45
b.
$71.36
c.
$90.67
d.
$87.56

Question

@Directrix
Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 17 feet by 17 feet by 2 inches for a patio if the concrete costs $40.00 per cubic yard?
a.
$76.45
b.
$71.36
c.
$90.67
d.
$87.56

directrix · Answer

@clairvoyant1

How many feet in a yard?
How many inches in a yard?

With that info, we can get started on this problem.

directrix · Answer

Do you know this:  How many feet in a yard? How many inches in a yard?

anonymous · Answer

3?

directrix · Answer

The idea is to change the given measurements into yards so that when we multiply to get the volume, what we get will be in cubic yards.

directrix · Answer

17/3 * 17/3 * 2/36 * 40 = ?

directrix · Answer

Copy this into the Google search box and the Google calculator will pop up with the answer:

17/3 * 17/3 * 2/36 * 40 =

directrix · Answer

Yes, 3 feet in a yard. 36 inches in a yard.

anonymous · Answer

Solve the proportion for x.

anonymous · Answer

a) 1/5
b) 1/2
c) 5/3
d) 16/5

directrix · Answer

Cross multiply.

3*(9x) = 1* (2x + 5)

directrix · Answer

@clairvoyant1

directrix · Answer

3*(9x) = 1* (2x + 5)

27x = 2x + 5  --> Solve for x.

directrix · Answer

25x =5
x = ?

anonymous · Answer

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. 

f(x) = quantity x minus seven divided by quantity x plus two. and g(x) = quantity negative two x minus seven divided by quantity x minus one.

anonymous · Answer

Hello you there?

phi · Answer

you should make a new post for each question.  It's easier to understand that way.

anonymous · Answer

yea