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Lubov Fominskaja [6]
2 years ago
15

simplify the polynomial then finds its value for the given value of the variable 3x^3-x^3+5x^3-9x^3 if x=-1

Mathematics
1 answer:
melisa1 [442]2 years ago
5 0

Answer: 2

Step-by-step explanation:

3•(-1)^3 - (-1)^3 + 5•(-1)^3 - 9•(-1)^3

3•(-1) - (-1) + 5•(-1) - 9•(-1)

-3 +1 -5 +9= 2

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Find three consecutive even integers such that 3 times the first is 26 less than twice the sum of the last two
Dimas [21]
Let's say our first integer is "a".

how to get the next consecutive EVEN integer?  well, just add or subtract 2 from it, therefore, the second consecutive integer will be "a + 2".

and the next after that, will then be (a + 2) + 2, or "a + 4".

so those are are 3 integers, a           a + 2           a+4

notice that, from any even or odd integer, if you hop twice either forwards or backwards, you'll land on another even or odd integer respectively.

2 + 2 is 4, or 8 + 2 is 10  some even ones

3 + 2 is 5, or 13 + 2 is 15, some odd ones

\bf \stackrel{\textit{3 times the first}}{3a}~~=~~\stackrel{\textit{26 less than twice the sum of the others}}{2[~(a+2)+(a+4)~]~~~-26}
\\\\\\
3a=2[~2a+6~]-26\implies 3a=4a+12-26\implies 3a=4a-14
\\\\\\
0=a-14\implies 14=a

what are the other two consecutive integers?  well, a + 2 and a + 4.
4 0
3 years ago
Which of these is a verb? <br><br>Europe<br><br>Pretty<br><br>Cup<br><br>Glanced
Serjik [45]
Hello there! A verb is a word that takes an action of doing something, so the answer would be Glanced.
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7 0
3 years ago
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shusha [124]

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6 0
3 years ago
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Mandarinka [93]

Answer:

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Step-by-step explanation:

for question number 15...cordinated grid shows each equation...first equation is represented by straight line going upwards through +4 in y axis...(y=3x+4)...

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5 0
3 years ago
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baherus [9]
A=g≈-32

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v=-32t+C, where C is the initial velocity, which we are told is 20 ft/s

v=-32t+20

h=⌠v dt

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h=-16t^2+20t+3

Your choices may have made a different assumption about the initial height of course but you did not show your choices, but certainly it will be:

h(t)=-16t^2+20t+hi, where hi is the initial height in feet.

This of course ignores air resistance and flight dynamics of a spinning ball with seams, which will make a significant difference in real life :)
3 0
3 years ago
Read 2 more answers
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