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3 years ago

a truck and its load weigh 22,800 pound. if the load weight 12,400 pounds more than the truck, how many does the truck weight?

Mathematics

1 answer:

alexandr1967 [171]3 years ago

5 0

10,400 pounds I think

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3 years ago

the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.

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X - tens digit
y - units digit

$x=2y\\
x+y=12\\\\
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3 years ago

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Answer:

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Step-by-step explanation:

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Read 2 more answers

The SAT Reasoning Test (formerly called the Scholastic Aptitude Test) is perhaps the most widely used standardized test for coll

slamgirl [31]

Answer:

The score is $x = 1884$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 1500$

The standard deviation is $\sigma = 300$

From the question we are told that the score follow a normal distribution

i.e $X \~ \ N( 1500 , 300)$

The proportion of score in the top 10% is mathematically

$P(X > x ) = P( \frac{X - \mu}{\sigma } > \frac{x - \mu}{\sigma } ) = 0.10$

Where x is the minimum score required to be in the top 10%

Now the $\frac{X - \mu}{\sigma } = Z (The \ Standardized \ value \ of \ X)$

$P(X > x ) = P( Z > \frac{x - \mu}{\sigma } ) = 0.10$

$P(X > x ) = P( Z > \frac{x - 1500}{300} ) = 0.10$

So the critical value of 0.10 from the normal distribution table is $Z_{0.10} = 1.28$

$\frac{x - 1500}{300} = 1.28$

$x = 1884$

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3 years ago