Pick a phone number without the area code. Replace the hyphen with an equal sign. Then insert symbols to try and
make a true statement. (Not all phone numbers will work.)

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

The product of sin 30 degrees and sin 60 degrees is same as the product of