Em uma festa junina, uma
barraca de tiro ao alvo oferece
R$ 5,00 ao participante cada
vez que acertar o alvo.
Entretanto, se errar, o participante paga R$ 1,00.
Um indivíduo deu 50 tiros e
recebeu R$ 70,00.
Nessas condições, qual foi o número de vezes que
esse participante errou o alvo?

answer: the answer is one of

step-by-step explanation:   we are given to write a proper fraction where the whole is divided into an even number of equal parts less than ten, and an odd number of those parts exist.

an even number less than 10 may be one of 2, 4, 6 or 8. so, the whole may be one of these four evens.

now, an odd number of these parts must exist, so the numerator must be an odd number, one of 1, 3, 5 or 7. it cannot be 9 because then the fraction will become improper.

thus, our fraction may be one of the following

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: