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2 years ago

2. what is the solution to to equation -2(x + 4)= -20?

Mathematics

1 answer:

aleksley [76]2 years ago

7 0

Answer:

$x=6$

Step-by-step explanation:

$-2(x + 4)= -20$

Divide both sides by -2:

 $x+4=\cfrac{-20}{-2}$ 

Divide -20 by -2 = 10

 $x+4=10$ 

Subtract 4 from both sides:

 $x=10-4$ 

 $x=6$ 

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2 years ago

Bill deposits $3,000 into an account that pays simple interest at a rate of 3% per year. How much interest will he be paid in th

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Answer:

The interest he will be paid in the first 4 years is $360

Step-by-step explanation:

The rule of the simple interest is I = Prt, where

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2 years ago

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2 years ago

Merta reports that 74% of its trains are on time. A check of 60 randomly selected trains shows that 38 of them arrived on time.

kenny6666 [7]

Answer:

No, the on-time rate of 74% is not correct.

Solution:

As per the question:

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q' = 1 - 0.74 = 0.26

We need to find the probability that out of 60 trains, 38 or lesser trains arrive on time.

Now,

The proportion of the given sample, p = $\frac{38}{60} = 0.634$

Therefore, the probability is given by:

$P(p\leq 0.634) = [\frac{p - P'}{\sqrt{\frac{P'q'}{n}}}]\leq [\frac{0.634 - 0.74}{\sqrt{\frac{0.74\times 0.26}{60}}}]$

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2 years ago

2. what is the solution to to equation -2(x + 4)= -20?​

2. what is the solution to to equation -2(x + 4)= -20?