Solve -3x - 2 = 19.
show each step of work.

-3x-2=19

move -2 to the other side

sign changes from -2 to +2

-3x-2+2=19+2

-3x=19+2

-3x=21

divide both sides -3 to get +x

-3x/-3=21/-3

Cross out -3 and -3, divide by 3 and then becomes -1*-1*x=x

divide by 3 for 21/-3

21/3=7

-3/3=-1

7*-1=-7

x=-7

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.