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Dennis_Churaev [7]
3 years ago
11

PLZ HELP 20 POINTS I really need help and show the work if you got it right cause i want to know

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
5 0
Idek how they got that , but yk when you got it wrong you could see how to get the answer, you have check answers right?
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Nookie1986 [14]
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6 0
3 years ago
Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1 and the given zeros for
timama [110]
The general form of a polynomial is: x² + bx + c = 0. Substituting the roots,

3² + b(3) + c = 0
3b + c = -9 --> eqn 1

(5 + √5)² + (5 +√5)(b) + c = 0
(5+√5)b + c = -30-10√5 --> eqn 2

Solving both equations simultaneously by subtracting eqn 2 from eqn 1,
(-2 - √5)b = 21 + 10√5
b = -8 - √5

Using eqn 1,
3(-8 - √5) + c = -9
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Hence, the polynomial is: <em>f(x) = x² + (-8 - √5)x + (15 + 3√5)</em>.
7 0
3 years ago
Boris drove 240 miles using 9 gallons of gas. At this rate, how many gallons of gas would he need to drive 216 miles?
satela [25.4K]
Use proportion to solve this.
240 miles needs 9 gallons
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Hope it helped!
6 0
3 years ago
Read 2 more answers
What is 2x+7=-8x-9+10 solved
ss7ja [257]

2x+7=-8x-9+10

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6 0
3 years ago
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Zinaida [17]

Answer:

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Step-by-step explanation:

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The upper quartile is the right side value of the box

The lower quartile is the left side value of the box

upper quartile = 61 and lower quartile = 39

IQR = 61 - 39 = 22 → B

7 0
3 years ago
Read 2 more answers
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