Answer:
(a)
Step-by-step explanation:
Note the expansion of (x - 5y)² is
(x - 5y)² = x² - 10xy + 25y² , that is
(x - 5y)² = x² + 25y² - 10xy ← substitute given values
(- 16)² = 416 - 10xy
256 = 416 - 10xy ( subtract 416 from both sides )
- 160 = - 10xy ( divide both sides by - 10 )
xy = 16 → (a)
2(4.25 + 2.25) = 2(6.50) = 13...this is the cost without the tax
13 + 0.05(13) = 13 + 0.65 = 13.65 <=== total with the sales tax added
Step-by-step explanation:
Growth in population each year = 3%(1500)
= 3/100 × 1500
= 3 × 15
= 45
Therefore, the growth in population in 6 years
= 6 × 3%(1500)
= 6 × 45
= 270
Hence, the population after 6 years = 1500 + 270
= 1770
Answer:
The slope is 2
Step-by-step explanation:
Equation of line is y = mx + b
The cost function is an illustration of a linear function
The equation of the cost function is C(x) = 35 + 0.5x
The given parameters are:
-- the cost of renting a cooler
--- the rate per bottle
Assume the number of bottles in a cooler is x.
The cost function for the bottles in a cooler would be:
So, we have:
Evaluate the products
Hence, the equation is
Read more about linear functions at:
brainly.com/question/15602982
