Anna and belle are asked to solve −2x − 15 = 6x + 9. identify where one of them made an error. anna belle −2x − 15 = 6x + 9 −2x − 15 −6x = 6x + 9 −6x −8x − 15 = 9 −8x − 15 + 15 = 9 + 15 −8x = 24 negative 8x over negative 8 equals 24 over negative 8 x = −3 −2x − 15 = 6x + 9 −2x − 15 + 2x = 6x + 9 + 2x −15 = 8x + 9 −15 + 9 = 8x + 9 + 9 −6 = 8x negative 6x over 8 equals 8x over 8 negative two-thirds

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

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Write the fraction or mixed number and the decimal shown by the model