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

-2b + y = -6
y = -6 + 2b

then substitute the result (-6 - -2b) into the second equation:

3b - 8(-6 + 2b) = 7
3b + (-8 x -6) + (-8 x 2b) = 7
3b + 48 - 16b = 7
3b - 16b = 7 - 48
-13b = -41
b = \( \frac{-41}{-13} \)
b = 3\(\frac{2}{13}\)

To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.

(6a)(5ab) + (6a²)(3b)
(6 x 5)(a x a x b) + (6 x 3)(a² x b)
(30)(a¹⁺¹ x b) + (18)(a²b)
30a²b + 18a²b
48a²b

The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.

According to the Pythagorean theorem, the hypotenuse squared is equal to the sum of the two perpendicular sides squared:

c² = a² + b²
c² = 3² + 3²
c² = 9 + 9
c² = 18
c = \( \sqrt{18} \)

An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.