Answer: first option 3, - 7
Justification:
1) Given expression:9x² - 5x - 7
2) Each monomial is a term.
The monomials are each combination of numbers and letters (coefficient, letters and exponents) separated of other monomials (terms) with a + or - operator.
3) Therefore, there are 3 terms which are:
9x²,
-5x, and
-7.
The polynomials with 3 terms are called monomials.
4) The monomial (term) withoud letter is the constant. In this case that is -7.
Let's solve it step-by-step:
25 + 20 = 45
45 + 45 = 90
90 + 34 = 124
124 + 21 = 145
Therefore:
25 + 20 + 45 + 34 + 21 = 125
Hope it helped,
BioTeacher101
Answer:
the perimeter is 87
Step-by-step explanation:
