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bezimeni [28]
3 years ago
9

Confused on number 5 can someone plz help

Mathematics
1 answer:
Bingel [31]3 years ago
7 0
Can you give me the problem
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The teachers sold 32 tickets this is 80% of the tickets given to the teachers how many tickets were given to the teachers
UkoKoshka [18]
You would give the teacher 40 tickets
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3 years ago
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What is the slope of a line that passes through (0,5) and (3,2)?
Goshia [24]

Answer:

undefine

Step-by-step explanation:

slope=2-5/3-0

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5 0
3 years ago
These roots of the polynomial equation x^4-4x^3-2x^2+12x+9=0 are 3,-1,-1. Explain why the fourth root must be a real number. Fin
Alex787 [66]

Roots with imaginary parts always occur in conjugate pairs. Three of the four roots are known and they are all real, which means the fourth root must also be real.

Because we know 3 and -1 (multiplicity 2) are both roots, the last root r is such that we can write

x^4-4x^3-2x^2+12x+9=(x-3)(x+1)^2(x-r)

There are a few ways we can go about finding r, but the easiest way would be to consider only the constant term in the expansion of the right hand side. We don't have to actually compute the expansion, because we know by properties of multiplication that the constant term will be (-3)(1)(1)(-r)=3r.

Meanwhile, on the left hand side, we see the constant term is supposed to be 9, which means we have

3r=9\implies r=3

so the missing root is 3.

Other things we could have tried that spring to mind:

- three rounds of division, dividing the quartic polynomial by (x-3), then by (x+1) twice, and noting that the remainder upon each division should be 0

- rational root theorem

4 0
3 years ago
Read 2 more answers
I need the correct answers only!!!
ehidna [41]
1) is false, it is always a rhombus.
2) is true, a rectangle with all sides equal would be a square.
3) is false, a kite's side lengths must be 2 pairs of unequal lengths.
4) is true, a square is a rhombus that has 90-degree angles.
5) is true, a kite must have 2 pairs of unequal lengths, but a trapezoid cannot have exactly 2 sides of equal lengths.
3 0
3 years ago
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What problem do you set up to find x and y
prohojiy [21]
You can use y=mx+b or x-1x/y-1y
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3 years ago
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