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yawa3891 [41]
3 years ago
14

in one week Joe worked 23 hours cutting grass. He was paid $9/h. From his money, Joe bought 5 tickets for football game, at $15

per ticket, and 2 dvds for $21 each, including tax. How much money will how have left?
Mathematics
1 answer:
LuckyWell [14K]3 years ago
8 0

Joe will have 90 dollars left

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Permutations vs combinations(one step):
Bogdan [553]

Answer:

the expression is: ^{15}P_3=\frac{15!}{(15-3)!}

and 2730 different ways are possible.

Step-by-step explanation:

In the given question we have to choose a president, vice

president, and secretary.

Permutations are used when order is important so, as in the given question order is required. We would use permutations

The formula used is: ^nP_r=\frac{n!}{(n-r)!} where:

n=total number of objects

r=number of objects selected

In our case: n=15, r=3

Putting values and finding the answer:

^nP_r\\^{15}P_3=\frac{15!}{(15-3)!} =2730 \ ways

So, the expression is: ^{15}P_3=\frac{15!}{(15-3)!}

and 2730 different ways are possible.

7 0
3 years ago
In music theory, a musical chord is named according to its roots, or its first root. by knowing the root of a chord, a musician
kirill [66]

The roots of a polynomial function tells us about the position of the equation on a graph and the roots also tells us about the complex and imaginary roots. So, Roots of chords are similar to the roots of polynomial functions.

A real root of a polynomial function is the point where the graph crosses the x-axis (also known as a zero or solution). For example, the root of y=x^2 is at x=0.

Roots can also be complex in the form a + bi (where a and b are real numbers and i is the square root of -1) and not cross the x-axis. Imaginary roots of a quadratic function can be found using the quadratic formula.

A root can tell you multiply things about a graph. For example, if a root is (3,0), then the graph crosses the x-axis at x=3. The complex conjugate root theorem states that if there is one complex root a + bi, then a - bi is also a complex root of the polynomial. So if you are given a quadratic function (must have 2 roots), and one of them is given as complex, then you know the other is also complex and therefore the graph does not cross the x-axis.

So, The roots of a polynomial function tells us about the position of the equation on a graph and the roots also tells us about the complex and imaginary roots. So, Roots of chords are similar to the roots of polynomial functions.

Learn more about POLYNOMIAL here

brainly.com/question/7693326

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2 years ago
Jack bought a bike for $550 and then sold for $680 what was his percentage profit
ludmilkaskok [199]
23.64%. Hope this helps!
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3 years ago
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Andrei [34K]

Answer:

C: (2,3)

Step-by-step explanation:

to solve this algebraically just plug in the x and y values of the points and see if they are true, but here is the graph to juse show you

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