You need to find the value of b so solve the first equation in terms of y:

-5b + y = 2
y = 2 + 5b

then substitute the result (2 - -5b) into the second equation:

-3b + 5(2 + 5b) = -3
-3b + (5 x 2) + (5 x 5b) = -3
-3b + 10 + 25b = -3
-3b + 25b = -3 - 10
22b = -13
b = \( \frac{-13}{22} \)
b = -\(\frac{13}{22}\)

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

9a⁷ + 2a⁷ = 11a⁷

A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.

A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, \({\Delta y \over \Delta x}\), and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.

A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.