A scale model: 25 inches high <span>with a base length of 5 inches,
</span>the real monument: 550 feet high <span>with a base length of x feet⇒
25:5=550:x
5*550=25x⇒x=2750/25
x=110
</span><span>The base length of the real monument is 110 feet.</span>
The correct answer is A. rational expression
Rational expression refers to a fraction in which the numerator and denominator are polynomials. Polynomials are variables. So therefore rational expression is the answer to the term that describes a fraction that has a variable or variables expression in its numerator and it denominator or both.
Minus 1 both sides
x²-8x=-1
take 1/2 of the linear coefient and square it
-8 is the linear coefient
-8/2=-4, (-4)²=16
add 16 to both sides
x²-8x+16=16-1
factor perfect squaer trinomial
(x-4)²=15
square root both sides, remember to take positive and negative roots
x-4=+/-√15
not exactly sure what to put in the blnaks
but
the solutions are x=4+√15 and x=4-√15
B. The equation can become −2(4x − 1) = 12 by applying the addition property of equality because we have: <span>−2(4x − 1) − 7 = 5 / + 7 <=> -2(4x-1) = 12;</span>
