The best way to combine these sentence into one correctly complete one is to use semicolon. In general, semicolon is used in order to combine two sentences that share similar idea into one. It is needed to avoid repetition and redundancy. So the correct sentence looks like this: These trains were not toys; they were detailed models built to try out ideas for real trains.
Theo other answer is incorrect, the first blank is undulate and the second is oscillate
Undulate is to rise and fall like waves and oscillate is to swing back and forth.
Any two negative numbers will always give you a positive number, so let's just ignore the - for now.
Straight away, two numbers that multiply to give 72 is 8 and 9. This is just basic multiplying. Now, to check if it adds to 17 (because we're ignoring the minus for now), you just do 8 + 9, which coincidentally happens to be 17. So you just place a minus in front of 8, and a minus in front of 9, and you get -8 × -9 = 72, and -8 + -9 = -17.
Answer:
Bias because it is an opinion
February 18th
Am I close or far ☹️
