Pedro's mean mark after 6 results was 68 . His mean mark dropped to 59 when he received his seventh result which was for spanish . what was his spanish mark.​

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?