Answer:
9 cm, 7 cm, 6 cm and 8 cm
Step-by-step explanation:
The perimeter is the sum of all the sides.
4 sides' expressions are given, so we add them and equate to 30.
Note: we disregard the value of x = -6, because it is going to give us side with negative length, that can't happen!
So, we take x = 4
Hence, length of each side is:
x + 5 = 4 + 5 = 9 cm
x + 3 = 4 + 3 = 7 cm
2x -2 = 2(4) - 2 = 8 - 2 = 6 cm
x^2 - 2x = (4)^2 - 2(4) = 16 - 8 = 8 cm
These are the lengths of 4 sides: 9 cm, 7 cm, 6 cm and 8 cm.
Answer:
78%
Step-by-step explanation:
Ok to solve this we can write this as
80 =
We put the equation like this because were finding out how much he needs to get on his 5th test x in order to get a 80%
Your grade is the average of all of your scores hence the divided by 5
We next multiply both sides of the equation by 5 to get
400 = 72+82+85+83+x
400= 322+ x
78 = x
He must get a 78% minimum on his next test to get 80%
Hope that helps!
Degree: 5; leading coefficient: 10
Option D is correct.
Step-by-step explanation:
We need to identify if is a polynomial function, then state its degree and leading coefficient or not.
A polynomial is an algebraic expression containing two or more terms that have same variables but may have different exponents combined through mathematical symbol(+,-,*or/)
So, is a polynomial function
The degree of polynomial is the highest degree obtained by sum of all exponents of individual terms in the polynomial.
So, has highest degree 5
Degree = 5
The leading coefficient is the coefficient of first term of the polynomial.
So, has leading coefficient = 10
So, Leading coefficient = 10
So, Degree: 5; leading coefficient: 10
Option D is correct.
Keywords: Polynomials
Learn more about Polynomials at:
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