(8.5H)Which situation represents 1 point
a proportional relationship?
The cost of purchasing hay for $26 a
bale with a delivery charge of $30.
The cost of purchasing baby chicks at
$4.50 per chick
The cost of purchasing fencing at $29
a linear foot with an installation fee of
$300.
The cost of renting a backhoe for $79
per hour with a non-refundable deposit
of $300.

Solution:

in a proportional relationship, one variable is always a constant value times the other.

y = kx

Where, k is a constant

Option 1

The cost of purchasing hay for $26 a  bale with a delivery charge of $30

Cost = $ 26 a bale + 30

This does not forms a proportional relationship

Option 2

The cost of purchasing baby chicks at  $4.50 per chick

Let "x" be the number of chicks

Therefore,

Thus, this forms a proportional relationship

Option 3

The cost of purchasing fencing at $29  a linear foot with an installation fee of  $300

cost = $ 29 a linear foot + 300

This does not forms a proportional relationship

Option 4

The cost of renting a backhoe for $79  per hour with a non-refundable deposit  of $300

cost = $ 79 per hour + 300

This does not forms a proportional relationship

answer: 40.95

step-by-step explanation:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.