A company's profit \( H \) (in thousands of dollars) after a hours of operation is modeled by the equation: \( H=\sqrt{40 a-175}-1 \) Find the time when the profit will reach 4 thousand dollars.

s of ' \( a \) ' and ' \( b \) ', for which the equations \( 3 x-(a-1) y=b+7,6 x-(a+4) y=5 b-1 \) infinite solutions, are

k. \( \left[(2 a)^{2}\right]^{3} x(2 a)^{2} \)

Решите систему неравенств. \( \left\{\begin{array}{l}4 x>0 \\ \frac{1}{5} x \geq-1\end{array}\right. \) Ваш ответ:

Write a simplified algebraic expressions for the phrase "two thirds of the difference of \( x \) from \( y \) adided to twice \( x \).

e values of ' \( a \) ' and ' \( b \) ', for which the equations \( 3 x-(a-1) y=b+7,6 x-(a+4) y=5 b \) - y have infinite solutions, are