Answer:
i. Cell phone cases
Airpods
ii. x + y = 20 .............. 1
10.98x + 27.98y = 355.60 .............. 2
iii. x = 12, and y = 8
Step-by-step explanation:
Amount of sale = $355.60
Cost of Cell phone cases = $10.98
Cost of Airpods = $27.98
Number of phone accessories sold = 20
1. The variables to be considered in the question are:
i. Cell phone cases
ii. Airpods
2. Let the number of cell phone cases bought be represented by x, and that of airpods be represented by y.
Thus,
x + y = 20 .............. 1
10.98x + 27.98y = 355.60 .............. 2
From equation 1,
x = 20 -y
substitute the value of x in equation 2
10.98(20 - y) + 27.98y = 355.60
219.6 -10.98y + 27.98y = 355.60
17y = 136.60
y =
y = 8.0353
So that,
x = 20 -y
= 20 - 8.0353
x = 11.9647
Thus,
x = 12, and y = 8
Answer:
28oz of flour
Step-by-step explanation:
Please refer to the attached image for explanations
7,000,000+80,000+200+80+7
Answer: A yard stick is 36 inches
Step-by-step explanation:
Answer:
The value of k is 6
Step-by-step explanation:
we need to find the value of k
Given : - is the solution
........(1)
differentiate with respect to 'x'
Since,
so, ..........(2)
Again differentiation above with respect to 'x'
so, ........(3)
Now, put the value of in
add both the sides by
Cancel out the same terms from left and right sides
Hence, the value of k is 6