Algebra lesson questions

tell whether each equation is true false or open. explain.

1. 85 + (-10) = 95

2.4(-4) dived by (-8)6 = -3+5(3)

tell whether the given number is a solution of each question.

1. 5b + 1 = 16
given number is -3

2.-6b + 5 = 1
given number is 1/2

write an equation for each sentence.

1. the sum of 4x and -3 is 8

use a table to find the solution of each question.

1. 8 - 5w = -12

2. 1/2x - 5 = -1

solve

1. bicycle sales in the united states, the number y (in millions) of bicycles sold with the wheel sizes of 20 inches or greater can be modeled by the equation y = 0.3x +15, where x is the number of years since 1981. in what year were about 22 million bicycles sold?

solve

give three examples of equations that involve multiplication subtraction and have a solution of -4

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

Can someone me out here and the tell me the greatest common factor

Airplane speeds are measured in three different ways: (1) indicated speed, (2) true speed, and (3) ground speed. the indicated airspeed is the airspeed given by an instrument called an airspeed indicator. a plane’s indicated airspeed is different from its true airspeed because the indicator is affected by temperature changes and different altitudes of air pressure. the true airspeed is the speed of the airplane relative to the wind. ground speed is the speed of the airplane relative to the ground. for example, a plane flying at a true airspeed of 150 knots into a headwind of 25 knots will have a ground speed of 125 knots. the problems below refer to static and dynamic pressure. static pressure is used when a body is in motion or at rest at a constant speed and direction. dynamic pressure is used when a body in motion changes speed or direction or both. a gauge compares these pressures, giving pilots an indicated airspeed. in problem #s 1 and 2, use the following information. the indicated airspeed s (in knots) of an airplane is given by an airspeed indicator that measures the difference p (in inches of mercury) between the static and dynamic pressures. the relationship between s and p can be modeled by s=136.4p√+4.5. 1. find the differential pressure when the indicated airspeed is 157 knots. 2. find the change in the differential pressure of an airplane that was traveling at 218 knots and slowed down to195 knots. in problem #s 3 and 4, use the following information. the true airspeed t (in knots) of an airplane can be modeled by t=(1+a50,000) ⋅ s, where a is the altitude (in feet) and s is the indicated airspeed (in knots). 3. write the equation for true airspeed t in terms of altitude and differential pressure p. 4. a plane is flying with a true airspeed of 280 knots at an altitude of 20,000 feet. estimate the differential pressure. explain why you think your estimate is correct.