3 years ago

Find the value of each variable.

1 answer:

8 0

There's no way to pick the correct choice without seeing the system
of equations for which the pair of numbers is the solution. With no
equations, these are just pairs of numbers, and they're all beautiful.

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I need help on number 2 please help me. Thanks. Happy holidays

Airida [17]

Here, Pages in books = Number of books * number of pages in one book

So, Pages of picture book = 10 * 25 = 250
& Pages of chapter book = 120 * 5 = 600

So, Number of Total pages = 250 + 600 = 850

So, Option (D) is your answer! Hope this helps!!

5 0

3 years ago

For what value of x is the rational expression below undefined?

Blizzard [7]

Answer: The expression is undefined for x=4 and x=5.

The expression is undefined for any x that makes the denominator 0. This leads to solving a quadratic equation:

$\frac{x+3}{x^2-9x+20}\\x^2-9x+20\neq 0\\x_{1,2}\neq\frac{9\pm\sqrt{9^2-80}}{2}=\frac{9\pm1}{2}\\x_1\neq4\\x_2\neq5$