Which decimal is equivalent to -9/4​

Zoe placed colored blocks on a scale in science class. each block weighed 0.8 ounces. the total weight of all the colored blocks was 12.8 ounces. how many blocks did zoe place on the scale? write and solve an equation to find the answer.

Find an equation for the linear function which has slope -10 and x-intercept -7

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year