Responder:
<em>a) 1
</em>
<em>b) 12
</em>
<em>c) 3
</em>
<em>d) -1 y 3
</em>
Explicación paso a paso:
Dadas las siguientes ecuaciones;
a) x²-x =0
x² = 0+x
x² = x
x = 1
b) -x²+12x = 0
-x² = -12x
x² = 12x
x = 12
c) 3x² - 9x = 0
Suma 9x a ambos lados
3x²-9x+9x = 0+9x
3x² = 9x
3x = 9
x = 9/3
x = 3
d) x²-2x-3 = 0
x²-3x+x-3 = 0
x(x-3)+1(x-3) = 0
(x+1)(x-3) = 0
x+1 = 0 y x-3 = 0
x = -1 y 3
C 9,9
the opposite of negative nine is positive nine
the absolute value of a number is the distance of that number from 0 on a number line so negative nine would equal positive nine as the absolute value
Ignore my answer for b, but all the rest are correct. a: about 2.94 c:12.24 cm
Take out the division by bring 5 to the other side. (5x5). then bring the 3 over (-3 turns into +3). then divide by 2 to isolate n. final answer 14.
2n-3= 5x5
2n-3=25
2n=25+3
2n=28
n= 28÷2
n=14
Answer:
It would take 6.5 hours to paint 812.5 square feet
Step-by-step explanation:
Given:
Preston can paint 375 square feet in 3 hours
3 Hours require to paint 375 square feet
How many hours require to paint 812.5 square feet.
By Using Unitary Method we get
Hours required = 
Hence Preston would require 6.5 hours to paint 812.5 square feet
