1 Select the correct answer.
Which expression is equivalent to the given expression?
(10c6d+5)(2c-5d4)
ОА.
200
d
OB. 20cd
OC.
20
c30020
OD. 20c30d20
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Awnser?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Can someone me with these two circle theorem questions asap?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.