I need help for my math homework

The mass of riboflavin in one small serving (75 g) of raw almonds is 0.87 mg less
than the mass of riboflavin in 21 small servings of raw almonds. What is the mass
of riboflavin in one small serving of raw almonds?
a) Write an equation that models the situation.
b) Solve the equation using guess and check.
c) Solve the equation by isolating the variable.

answer: you need the equation in the question so i can answer it

step-by-step explanation:

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.