Answer:
degree of the monomial is the sum of the exponents of all included variables
Step-by-step explanation:
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If you represent the problem in a diagram, you will form a triangle with 3 known length of the sides. When you are given all sides, and you are asked to find an angle, you can use the cosine law.
b^2 = a^2 + c^2 - 2ac*cosB
1.4^2 = 1.9^2 + 1^2 - 2(1.9*1)(cosB)
B = 45.78°
Answer:
The student's weighted mean score is 92.2.
Step-by-step explanation:
To find the student's weighted mean scored, we multiply each grade by it's weight.
Grades and weights:
Homework: Grade of 86, weight of 20% = 0.2
Quiz: Grade of 87, weight of 5% = 0.05
Quiz: Grade of 91, weight of 5% = 0.05
Project: Grade of 98, weight of 45% = 0.45
Final Exam: Grade of 88, weight of 25% = 0.25.
What is the student's weighted mean score?
0.2*86 + 0.05*87 + 0.05*91 + 0.45*98 + 0.25*88 = 92.2
The student's weighted mean score is 92.2.
Answer:
what is the measures of triangle??
A variable can be used to represent an unknown amount. Then you write an equation using the variable and based on the information you are given, and you solve the equation to find the unknown amount.
Here is an example.
Mary has money in a bank account. She received $20 for her birthday. She deposited the $20 in her account. After the deposit, she was told the account had a balance of $85. How much money did she have in the account before depositing the $20?
We don't know the amount she had before depositing the $20, so we will call that amount x. x is a letter used as a variable to represent an unknown amount.
She had x dollars in her account before depositing the $20.
After she deposited the $20, she now has x plus 20, or x + 20.
We are told her account now has $85, so x + 20 must equal 85.
That allows us to write an equation which we can then solve to find the amount of money she had in the account before depositing the $20.
x + 20 = 85
Subtract 20 from both sides.
x + 20 - 20 = 85 - 20
x + 0 = 65
x = 65
Since the variable x represents the amount of money in the account before depositing the $20 birthday money, we can now answer the question.
Mary had $65.
