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3 years ago

Seven and four eighths plus two sevenths equals blank

Mathematics

1 answer:

Serggg [28]3 years ago

8 0

Answer:

7.78571428571

Step-by-step explanation:

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What percent of 132 grams is 43.2 grams ??

alexira [117]

The equation would be 43.2 divided by 132 which would give you .32 aka 32%

8 0

3 years ago

Ashley purchased a prepaid phone card for $25. Long distance calls cost 14 cents a minute using this card. Ashley used her card

OverLord2011 [107]

If we add $0.14 until we get $21.64, we would add it 154.572 times. To check this answer and make sure I’m right, do this equation: 0.14 x 154.572, then you would get 21.64.

The correct answer is 154.572 minutes.

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3 years ago

The security system in a house has two units that set off an alarm when motion is detected. Neither one is entirely reliable, bu

Mariulka [41]

Answer:

Probability that detector B goes off is '0.615'

Step-by-step explanation:

Given that:

1) Probability that detector A goes off and detector B does not go off is 0.25.

2)Probability that detector A does not go off is 0.35.

3)Probability that detector A goes off is (1-0.35)=0.65

Assuming that

Probability that detector B goes off is 'p' Hence the probability that detector B does not goes off is (1-p)

Thus the probability that detector A goes off and detector B does not go off is product of the individual probabilities

$P(E)=0.65\times (1-p)\\\\0.65\times (1-p)=0.25\\\\0.65-0.65p=0.25\\\\0.65-0.25=0.65p\\\\\therefore p=\frac{0.40}{0.65}=0.615$

Probability that detector B goes off is '0.615'

5 0

3 years ago

If 3x−y=12, what is the value of 8x -- 2y

marta [7]

Answer:

wait few minutes i will try

3 0

3 years ago

!! PLEASE HELP QUICKLY 20 POINTS !! Evaluate 4 - 0.25g + 0.5h when g=10 and h=5

Sonja [21]

Step-by-step explanation:

4- 0.25 + 0.5h

0.25g= 2.5

4- 2.5 = 1.5

0.5h = 2.5

4- 2.5 + 2.5

addition is first

2.5+2.5 = 5

4-5 =-1

I honestly don't know if that's right but I tried aha x

4 0

3 years ago