Question

please answer this questions Which I marked fast please​

Answer 1

Answer:

2.) 35/33 = 1.06

4.) -8

7.) 13/21

Step-by-step explanation:

2.)

$\frac{9x}{7-6x} =15\\\\9x=15(7-6x)\\\\9x=105-90x\\\\9x+90x=105\\\\99x=105\\\\x=\frac{105}{99} \\\\x=\frac{35}{33} \\\\x=1.06$← In decimals.

4.)

$\frac{3y+4}{2-6y} =\frac{-2}{5} \\\\5(3y+4)=-2(2-6y)\\\\15y+20=-4+12y\\\\15y-12y=-4-20\\\\3y=-24\\\\y=\frac{-24}{3} \\\\y=-8$

7.) Let the numerator be $x$

According to the question,

$\frac{x+17}{x+8-1} =\frac{3}{2} \\\\\frac{x+17}{x+7} =\frac{3}{2} \\\\2(x+17)=3(x+7)\\\\2x+34=3x+21\\\\3x-2x=34-21\\\\x=13$

∴ The numerator is 13.

Denominator = x + 8 = 13 + 8 = 21

Hence, the fraction is $\frac{13}{21}$