So you would but a b on the outside and on the inside, you would put 8b because b x 8b makes b^2. Then, you would put +7 for the 7b and then close the brackets and thats your answer b(8b+7)
Answer:
The surface area of the side is the circumference times the height or 2 π * r * h, where r is the radius and h is the height of the side.
Step-by-step explanation:
Answer:
3.5 g
Step-by-step explanation:
To answer this, multiply 100 g by 0.035: 3.5 g
Answer:
the exact form is 3/8
in a decimal it's 0.375
Step-by-step explanation:
Answer:
x = 6
Step-by-step explanation:
Take f(x) = -(x+9)(x-21) and multiply it out. We get:
f(x) = -[x^2 + 9x - 21x - 189], or
f(x) = -x^2 + 12x + 189
This is a quadratic equation. The coefficients are a = -1, b = 12 and c = 189.
The equation of the axis of symmetry is x = -b/(2a), which here equals:
x = -12 / [2*(-1)], or x = 6.
