Ladder forms a right triangle with base 7 and hypotenuse 12, so
7²+h²=12². where h is the height
49+h²=144
h²=91
h=√91 or about 9.5
ladder touched the building about 9.5 ft up
Answer:
You'll need to post the polynomial itself. The degree will be the highest exponent, the leading coefficient will be the number in front of the variable of the term with the highest exponent, then count the number of terms separated by + and - signs.
Step-by-step explanation:
Answer:
1st: -3
2nd: 2
3rd: DNE
4th: -1
Step-by-step explanation: Just got it right! :]
Answer:

Step-by-step explanation:
we are given
the sum,common difference and nth term of a geometric sequence
we want to figure out the first term
recall geometric sequence

we are given that
thus substitute:

to figure out
we need to figure out the equation
simplify denominator:

simplify square:

simplify substraction:

simplify complex fraction:

calculate reciprocal:

reduce fraction:

multiply both sides by 4/7:

reduce fraction:

simplify multiplication:

hence,
