Write and simplify an expression for the perimeter of a triangle 4a-2b+9a-4+7a+3

Empty box + box + empty box fill in the box is equal to 30 how

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .

In priyas math class there are 10 boys and 15 girls. what is the ratio of boys to girls in priyas math class? express your answer as a decimal