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3 years ago

Which of the following best describes the equation below?

Mathematics

1 answer:

ivann1987 [24]3 years ago

4 0

Answer:

no real solutions

Step-by-step explanation:

2(x + 11) + 5x = 7x - 22

Distribute

2x+22 +5x = 7x -22

Combine like terms

7x +22 = 7x-22

Subtract 7x from each side

7x-7x+22 = 7x-7x-22

22 = -22

This is never true so there are no solutions

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28.71 is what percent of 6.6?

Zarrin [17]

Answer:

28.71 is 435% of 6.6

Step-by-step explanation:

100%/x%=6.6/28.71

(100/x)*x=(6.6/28.71)*x - we multiply both sides of the equation by x

100=0.229885057471*x - we divide both sides of the equation by (0.229885057471) to get x

100/0.229885057471=x

435=x

x=435

3 0

3 years ago

Read 2 more answers

The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours and the mean lifetime of a b

lesya [120]

Answer:

The probability of a bulb lasting for at most 552 hours.

P(x>552) = 0.0515

Step-by-step explanation:

Step(i):-

Given mean of the life time of a bulb = 510 hours

Standard deviation of the lifetime of a bulb = 25 hours

Let 'X' be the random variable in normal distribution

Let 'x' = 552

$Z = \frac{x-mean}{S.D} = \frac{552-510}{25} =1.628$

Step(ii):-

The probability of a bulb lasting for at most 552 hours.

P(x>552) = P(Z>1.63)

= 1- P( Z< 1.63)

= 1 - ( 0.5 + A(1.63)

= 1- 0.5 - A(1.63)

= 0.5 -A(1.63)

= 0.5 -0.4485

= 0.0515

Conclusion:-

The probability of a bulb lasting for at most 552 hours.

P(x>552) = 0.0515

7 0

3 years ago

Explain in words how to find the product of -4 (-1.5) using a number line.where do you end up

Ierofanga [76]

Answer:

To multiply two minus numbers they will result as a positive number.

the product of any numbers when there is a negtive will always have 2 negtives invlved form three numbers including the answer.

-4 x -1.5 is the same as 4 x 1.5

the answer is 6

Three numbers like -1 x 4 will also be 2 numbers of negative.

= -4

We change this to -4 x 1.5 and shows the answer as -6

But the question had 2 negative numbers already and the answer is just positive 6.

8 0

3 years ago

Read 2 more answers

to cover a rectangular region of her yard penny needs at least 170.5 square feet of sod. the length of the region is 15.5 feet.

pshichka [43]

To cover at least 170.5 sq.ft. the width must be at least 11 feet
W=170.5sq.ft / 15.5 ft = 11ft

7 0

3 years ago

Suppose that the batting averages or AVG (hits per at-bat) of all players in the AAA baseball league are normally distributed wi

bulgar [2K]

Answer:

0.1

Step-by-step explanation:

Solving using empirical rule formula

95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

Hence, the lower bound 95% =

μ - 2σ

Mean = 0.2

Standard deviation of 0.05

= μ - 2σ

= 0.2 - 2(0.05)

= 0.2 - 0.1

= 0.1

The lower bound is 0.1

6 0

3 years ago