(1) The population density of a village in South Africa is 2,000 people/100 mi?. Which of the following is equivalent to the population density of this South African village? (2.1)
(a) 0.2 people/mi?
(b) 2 people/mi?
(c) 2 people/10 mi?
(d) 20 people/mi?
(e) 200 people/mi?

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v

This is so hard and it’s for a test

Which expression is equivalent to (5x^7+7x^8) − (4x^4−2x^8)? a. 9x^8 + 5x^7−4x^4 b. 3x^8 + 7x^7 c. 12x^8 − 2x^4 d. 5x^8 + 5x^7 + 4x^4