Answer:
7 white and 8 dark bars
Step-by-step explanation:
x white bars
15-x dark bars
cost of white bars is 2 * x
cost of dark bars is 2,5 * (15-x)
Write an equation
2x + 2,5 * (15-x) = 34
2x + 37,5 - 2,5x = 34
-0,5 x = - 3,5
x = 7
So we have x = 7 white bars
and 15 - x = 15 - 7 = 8 dark bars
The plot of a function <em>f(x)</em> is symmetric across the <em>y</em>-axis if it is even, meaning <em>f(-x)</em> = <em>f(x)</em> for all <em>x</em> in the function's domain.
The answer is then A because
(-<em>x</em>)² = (-1)² <em>x</em>² = <em>x</em>²
|-<em>x</em>| = |-1| |<em>x</em>| = |<em>x</em>|
cos(-<em>x</em>) = cos(<em>x</em>)
The answer is <u>not</u>
• B because sin(-<em>x</em>) = -sin(<em>x</em>) and (-<em>x</em>)³ = (-1)³ <em>x</em>³ = -<em>x</em>³
• C because -<em>x</em> ≠ <em>x</em> and again because of <em>x</em>³
• D because 1/(-<em>x</em>) = -1/<em>x</em> and again because of sin(<em>x</em>)
Answer:
31.43
Step-by-step explanation:
3 1/7 = 3.14285714285
3 1/7 x 10 = 31.4285714286 which is about 31.43
B because its in the hundredths place