Answer:
Therefore the most Marney can pay for a case of 20 soda bottles is = $ 25.344
Step-by-step explanation:
Selling price of a bottle = $ 0.99
Mark price of of a bottle = 28 % above the selling price
Mark price of of a bottle = 1.28 × 0.99 = $ 1.2672
Now the payment for 20 soda bottles = 20 × mark price of one bottle
The payment for 20 soda bottles = 20 × 1.2672
The payment for 20 soda bottles = $ 25.344
Therefore the most Marney can pay for a case of 20 soda bottles is = $ 25.344
Answer:
<em>Proof in explanation</em>
Step-by-step explanation:
<u>Trigonometric Identities</u>
The basic trigonometric identity is:
We'll use it and some basic algebra to prove that, given:
And
Then
From the equation:
We have:
The equation
Can be rewritten as
Replacing [1]:
Taking the common factor:
The expression in parentheses is 1, thus:
Dividing by
Replacing in
We have
Dividing by
Now:
This expression is 1, thus it's proven:
D=dimes
q=quarters
d + q = 20
.10d + .25q = 3.05
d=-q + 20
.10(-q + 20) +.25q = 3.05
-.10q + 2 + .25 = 3.05
.15q + 2 = 3.05
.15q + 2 - 2 = 3.05 - 2
.15q = 1.05
.15q/.15 = 1.05/.15
q = 7
d + 7 = 20
d + 7 - 7 = 20 - 7
d = 13
Sally has 7 quarters and 13 dimes.
Hope this helps!
It is true because right is the reasons and left are the statements.
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