Ulises, Esteban e Iván presentaron un examen de historia que consistía en 30 preguntas. Ulises respondió correctamente 20% menos que las preguntas que respondió correctamente Esteban, e Iván respondió correctamente 45% más preguntas que lo hecho por Esteban. Si entre los tres tuvieron 65 aciertos, ¿cuántos aciertos tuvieron cada uno de ellos? *

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

What expression is equivalent to (84+16)

47: 4 aisha changed 1.45 + 2.38 to 1.5 + 2.4 in order to estimate the sum. what estimation method did she use?