Answer:
The answer is D
Step-by-step explanation:
I did it on edg
B: 914-20(27.80)=X, multiply: 20(27.80)=556, 914-556=$358 :A.
C: 914-27.80=$886.20 :)
Answer:
Step-by-step explanation:
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Description Equation
Derivative of a Constant Derivative of a Constant
Derivative of a Variable to the First Power Derivative of a Variable to the First Power
Derivative of a Variable to the nth Power Derivative of a Variable to the nth Power
Derivative of an Exponential Derivative of an Exponential
Derivative of an Arbitrary Base Exponential Derivative of an Arbitrary Base Exponential
Derivative of a Natural Logarithm Derivative of a Natural Logarithm
Derivative of Sine Derivative of Sine
Derivative of Cosine Derivative of Cosine
Derivative of Tangent Derivative of Tangent
Derivative of Cotangent Derivative of Cotangent
<h2>
Explanation:</h2><h2>
</h2>
Here we need to set a system of two linear equations in two variables. So:
- <em>The sum of digits in a two digit number formed by two digits from 1 to 9 is 8:</em>
Let 
be those digits, then:
- <em>If 9 is added to a number then both the digits become equal. find the number:</em>
<em />
<em />
<em />
<em />
But from eq 1:
Substituting y into the expression 1:
The x-value will be found by hit and trial, so:
We have to reject this solution because digits are different.
We have to reject this solution because digits are different.
<em>Then this is a two digit number formed by two equal digits. </em>
Finally, the number is:
44
Answer:
m + 2
Step-by-step explanation:
First minutes = $2
Additional minutes = $1 per minute
If a customer calls for m
minutes
Total charge for the call = 2 + 1(m)
= 2 + m
Also written as m + 2
