At the beginning of the week, the ratio of cats to dogs at Glenna's Pet Store was 4 to 5. By the end of
the week, the number of cats had doubled, while the
number of dogs had increased by 12. If the ratio of
cats to dogs at the end of the week was 1 to 1, how
many cats did the store have at the beginning of the
week?

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

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?