18-7x=4

13=19+2x

and i need the answer for

Solve the following equations, where t must come from the set of numbers

{2,3,5,7,11,13, ... }, otherwise there s no sollution i need all the workings for these questions!

Model check was created at a scale 8:1 and 4 feet long What would the length of the check be

Simplify (6^-2) (3^-3) (3*6) ^4

Find the value of cos Cos[cos^-1 (rad2/2) - pi/2}

There are 128128128 ounces in a gallon. There are 444 quarts in a gallon. How many ounces are in a quart?

What is (-10) •7• (-4)

The cost of a movie ticket is $19.80. Which expression below represents the cost of 5 movie tickets

Chris and lisa went shopping and spent a total of $25.50. lisa spent $13.50 more than what chris spent. How much did Lisa spend

A bank allows university students a 1000 overdraft facility on their bank accounts. in one month a student was 675 overdrawn. the next month the same student was 730 overdrawn. What is the difference between these two amounts?

Felicia drew a triangle with side lengths that measured 15 cm, 18 cm and 27 cm. To determine if Felicia drew a right triangle, she can use the equation:

Which solid figure has nine edges?