It is assumed that the equipment will lose value at a constant yearly rate. Then we can find a linear function to represent the value of the equipment.
The rate at which the equipment loses value is $ 875 / 5 years =$ 175 / year.
a) y = 875 - 175x
b) x = 2 => y = $875 - [S175/ year] (2year) = $875 - $350 = $ 525
c) y = 200 = 875 - 175x => x = [875 - 200] / 175 = 3.86 years
Answer:c.
Step-by-step explanation:I got it right
Answer:
17. x = y^2 - 2ay +a^2
18. x = y^2 - a
Step-by-step explanation:
17. Since we want to make x the subject of the formula, we first isolate the square root of x and get
= y - a.
squaring both sides,
x = y^2 - 2ay +a^2
18. Since both x and the a are under the square root, we first start by squaring both sides.
So y^2 = x+a.
Isolating the x, we get
x = y^2 - a
First, we need to calculate the surface area of the prism, to know how much space we need to cover. An important fact to keep in mind is that with a cuboid, there are three pairs of identical faces. This means that there are:
Two faces with a surface area of 2×1=2ft²
Two faces with a surface area of 3×2=6ft²
and two faces with a surface area of 1×3=3ft²
So, the total surface area of the shape is:
2(2)+2(6)=2(3)
=4+12+6
=22ft²
Knowing that each tile costs 1ft², then Marita will need 22÷1=22 tiles. Therefore, the total cost of tiling the whole prism is 22×0.45= $9.90