Substituindo x por -7 na expressão algébrica do item a) obtemos o valor numérico: a) 21
b) - 21
c) - 7
d) - 16
e) 16

Acar travels at an average speed of 52 miles per hour. how long does it take to travel 299 miles

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m