Write \( 75 \% \) as a fraction in simplest form.

EXERCISE 21.2 \( 1 y \) is inversely proportional to \( x \), and \( y=20 \) when \( x=5 \). Find the value of \( y \) when \( x=4 \).

Quantos nümeros entre 1 e 100 (inclusive) sāo divisiveis por 3 ou 4 ?

Identifique los parámetros de \( f(x)=\frac{-3}{2} x-5 \) y trace su gráfica. \( \mathbf{m}=-\frac{3}{2} \quad \) iBien hecho! \( \mathbf{b}=-5 \) \( \mathbf{x}_{\text {int }}= \)

21. \( y=x^{2}, x=y^{2} ; \quad \) about \( y=1 \) 22. \( y=x^{3}, y=1, x=2 ; \quad \) about \( y=-3 \) 23. \( y=3, y=1+\sec x,-\pi / 3 \leqslant x \leqslant \pi / 3 ; \quad \) about \( y=1 \) 24. \( y=\sin x, y=\cos x, 0 \leqslant x \leqslant \pi / 4 ; \quad \) about \( y=-1 \) 25. \( y=x^{3}, y=0, x=1 ; \quad \) about \( x=2 \) 26. \( x y=1, y=0, x=1, x=2 ; \quad \) about \( x=-1 \) 27. \( x=y^{2}, x=1-y^{2} ; \quad \) about \( x=3 \) 28. \( y=x, y=0, x=2, x=4 ; \quad \) about \( x=1 \)

Solve using the quadratic formula. \( -7 x^{2}+6 x+3=0 \) Write your answers as integers, proper or improper fractions in simplest form, or decimals rounded to the nearest hundredth. \( x=\square \) or \( x=\square \) Submit