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dem82 [27]
2 years ago
6

Factor 5a^2-30a+45, and 2x^5+x^4-2x-1.

Mathematics
1 answer:
Mrrafil [7]2 years ago
6 0

Step-by-step explanation:

{5a}^{2}  - 30a + 45

5( {a}^{2}  - 6a + 9)

5(a-3)(a-3)

5(a-3)^2

{2x}^{5}  +  {x}^{4}  - 2x - 1

X^4(2x+1) - (2x+1)

(x^4-1)(2x+1)

(x^2-1)(x^2+1)(2x+1)

(x-1)(x-1)(x^2+1)(2x+1)

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URGENTTTTTTT 20PT.
zaharov [31]
Out of the choices provided the answers would be C,D, and E
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4 0
3 years ago
Read 2 more answers
Two trains leave New York at the same time heading in opposite directions. Train A travels at 4/5 the speed of train one. After
grandymaker [24]
<h3>Answer:  </h3><h3>speed of train A = 44 mph</h3>

=============================================

Work Shown:

x = speed of train A

y = speed of train B

"train A travels 4/5 the speed of train B" (I'm assuming "train one" is supposed to read "train B"). So this means x = (4/5)y

distance = rate*time

d = x*7

d = (4/5)y*7 = (28/5)y represents the distance train A travels

d = y*7 = 7y represents the distance train B travels

summing those distances will give us 693

(28/5)y + 7y = 693

5*(  (28/5)y + 7y ) = 5*693

28y + 35y = 3465

63y = 3465

y = 3465/63

y = 55

Train B's speed is 55 mph

4/5 of that is (4/5)y = (4/5)*55 = 4*11 = 44 mph

Train A's speed is 44 mph

8 0
3 years ago
Jynessa wants to order these fractions: StartFraction 4 over 9 EndFraction, two-thirds, one-sixth, Negative 2 and one-half. What
White raven [17]

Answer:

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Step-by-step explanation:

8 0
2 years ago
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Find the segment length indicated. Assume that lines which appear to be tangent
Jobisdone [24]

Answer:

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Step-by-step explanation:

5 0
2 years ago
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lesantik [10]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
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