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marshall27 [118]
4 years ago
14

What are the x-intercepts for the function ƒ(x) = -x(x − 4)?

Mathematics
1 answer:
s344n2d4d5 [400]4 years ago
7 0

Answer:

D

Step-by-step explanation:

f(x)=-x(x-4)

f(x)=-x²+4x

-x²+4x=0

x(-x+4)=0

x=0, x=4

(2)

4x²-x-3=0

(4x²+3x)-(4x-3)=0

x(4x+3)-1(4x+3)=0

x=1, x=-3/4

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There are 3 cards in Box A and 3 cards in Box B.
Anton [14]

Answer:

  • 4/9

Step-by-step explanation:

<u>Possible number of pairs of given cards:</u>

  • 3*3 = 9

<u>Number of sums with odd score, two odd numbers added to an even number from each box:</u>

  • 2*1 + 1*2 = 4  (pairs of 3 and 5 with 2 or pairs of 9 and 3 with 4)

<u>Required probability:</u>

  • P(odd) = 4/9
8 0
3 years ago
Marjory practiced the piano for 12 minutes. How many seconds did she practice?
Lorico [155]
Answer:
720 sec
Step-by-step explanation:
In 1 Min=60sec
so 12×60=720
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5 0
3 years ago
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Solve by Factorisation 2x^(2)+3x-20=0
ad-work [718]

Answer:

(-4  ; 5/2)

Step-by-step explanation:

2x² + 3x - 20 = 0

2x² + 8x - 5x - 20 = 0

2x(x+4) - 5(x+4) = 0

(x+4)(2x-5) = 0

x+4 = 0

x = -4

2x - 5 = 0

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6 0
3 years ago
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Rates Lin, Diego, and Elena are competing to see who can finish their book the fastest. Lin read the first 54 pages from a 270-p
Sav [38]

Answer:

Diego will finish first while Lin and Elena would finish reading their book at the same time

Step-by-step explanation:

Rates Lin, Diego, and Elena are competing to see who can finish their book the fastest.

Their rates is calculated as:

For Lin

Lin read the first 54 pages from a 270-page book in the first 3 days.

54 pages = 3 days

270 pages = x

Cross Multiply

54x = 270 × 3

x = 270 × 3/54

x = 15 days

For Diego

Diego read the first 100 pages from a 320-page book in the first 4 days.

100 pages = 4 days

320 pages = x days

Cross Multiply

100x = 320 × 4

x = 320 × 4/100

x = 12.8 days

For Elena

Elena read the first 160 pages from a 480-page book in the first 5 days.

160 pages = 5 days

480 pages = x days

Cross Multiply

160x = 480 × 5

x = 480 × 5/160

x = 15 days

If they continue to read every day at these rates, who will finish first, second, and third?

Diego will finish reading his book first while Lin and Elena would finish reading their book at the same time

4 0
3 years ago
A department store is having sale 20%off all for all kitchen appliances what is the discount for 250$microwave
Mrrafil [7]

Answer:

200

Step-by-step explanation:

250 times 20% (.20) = 50

Subtract 50 by 250

250 - 50 = $200

8 0
3 years ago
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