3 years ago

John's age is 9 more than three times Rick's age. Which expression represents this?

Mathematics

2 answers:

Lina20 [59]3 years ago

7 0

This answer is A. More then indicates addition

Y_Kistochka [10]3 years ago

4 0

The correct answer is A.

Explanation:
Rick’s age isn’t an independent variable in this equAtion. It’s asking to first multiply 3 by rick’s age, then to add 9 to the product of Ricks age

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Let k ( x ) = 2 x + 3 and m ( x ) = 3 x 2 + 7 x − 10 . Find the indicated value. M ( k ( − 4 ) ) =

murzikaleks [220]

Answer: $30$

Step-by-step explanation:

Given

$k(x)=2x+3$

$M(x)=3x^2+7x-10$

$M\left(k(x)\right)$ is given by replacing the $x$ by $k(x)$ from the $M(x)$

$\Rightarrow M\left(k(x)\right)=3(2x+3)^2+7(2x+3)-10\\\Rightarrow M\left(k(x)\right)=3(4x^2+9+12x)+14x+21-10\\\Rightarrow M\left(k(x)\right)=12x^2+50x+38$