A continuación se realizan algunas ope-raciones de forma oral. Indica en cada caso las estrategias utilizadas y qué pro-piedades de las operaciones se están uti-lizando: a) 2.453 − 1.238, dos mil cuatrocientos cincuenta y tres menos mil doscien-tos, mil doscientos cincuenta y tres, menos treinta, mil doscientos veinti-trés, mil doscientos veinte menos cin-co, mil doscientos quince.

b) 197 + 322 + 38, trescientos treinta y treinta, trescientos sesenta, más dos-cientos, quinientos sesenta, menos tres, quinientos cincuenta y siete.

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.

Abdul is making a map of his neighborhood he knows the following information: his home, the middle school, and high school are all on the same street. his home, the elementry school, and his friends house are on the same street. the angle between the elementary school, middle school, and his home is congruent to the angle between his friends house, the high school, and his home. what theorem can abdul use to determine the two triangles are similar? a- side side side similarity theoremb- angle angle similarity theoremc- corresponding parts of similar triangles are congruentd- pieces of right triangles similarity theorem