Help please Allison rents a musical instrument. This graph shows the cost to rent the instrument for different lengths of time. First box choice is horizontal or vertical 2 box is congruent or similar 3 box is horizontal or vertical 4 box is horizontal or vertical 5 box is each month that or as the number of months

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

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step-by-step explanation:

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.