lillovecandy
05.05.2021 •
Mathematics
angle a and b are complementary angles. if angle a =2x degrees and angle b= 3x+15 degrees, what is the value of x?
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Ответ:
So,
(3x + 15) + 2x = 90°
Remove the parentheses:
3x + 15 + 2x = 90
Combine like terms:
5x + 15 = 90
Subtract 15 on both sides:
5x = 85
Divide 5 on both sides:
x = 17
~
Ответ:
Let x = number of gallons of the 35% acid solution Eli
should add. The equation would be
0.5 gal (0.1) + x gal (0.35) = (0.5 + x)(0.15)
This would be the equation to find the answer.
Solving for x,
X = 0.125 gallons