Solve the system by the substitution method

X+y = - 9

Y = - 4x

Find the hypotenuse of a triangle with a base of 11 cm and height of 9 cm

What is the correct expanded form and value of (1/5⁴)

0.4859 as a fraction

Simplify this expression 5.3x-2.2 (9.6x-9.11)

Calculate the length of the circumference of a circle with diameter of 6.2cm

Is 27/51 a proper fraction

Describe a possible real world context or situation that can be represented by the expression 14x+3y+250. identify the variables, variable terms, constant terms, and coefficients, as well as what they represent in the context you describe.

Suppose that a company has just purchased a new computer for $2800. The company chooses to depreciate using the straight-line method for 7 years.

Find the product. y^5·y^3

Jessica has several red, white, and black marbles in her pocket. If she draws a marble out of her pocket without looking, the probability of drawing a red marble is 2 5 , the probability of drawing a white marble is 1 10 , and the probability of