Can u plzz help meeee

Mathematics

2 answers:

Strike441 [17]3 years ago

6 0

10 because 8 squares plus 6 squared equals 100 and the root of 100 is ten

lukranit [14]3 years ago

6 0

Answer:

Step-by-step explanation:

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-2x+4y=28 -3x +2y = 6 Solve for x

NNADVOKAT [17]

Answer:

x=4, y=9

Step-by-step explanation:

Solve with substitution.

3 0

2 years ago

Whats 99 divided by eight with long divison

saveliy_v [14]

Answer:

12 remainder 3

Step-by-step explanation:

8 times 12 is 96, and to get to 99 you would need 3 more. So it is 12 with a remainder of 3.

6 0

3 years ago

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 259.2-cm and a standard dev

Varvara68 [4.7K]

Answer:

The probability that the average length of rods in a randomly selected bundle of steel rods is greater than 259 cm is 0.65173.

Step-by-step explanation:

We are given that a company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 259.2 cm and a standard deviation of 2.1 cm. For shipment, 17 steel rods are bundled together.

Let $\bar X$ = the average length of rods in a randomly selected bundle of steel rods

The z-score probability distribution for the sample mean is given by;

Z = $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ ~ N(0,1)

where, $\mu$ = population mean length of rods = 259.2 cm

$\sigma$ = standard deviaton = 2.1 cm

n = sample of steel rods = 17

Now, the probability that the average length of rods in a randomly selected bundle of steel rods is greater than 259 cm is given by = P( $\bar X$ > 259 cm)

P( $\bar X$ > 259 cm) = P( $\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }$ > $\frac{259-259.2}{\frac{2.1}{\sqrt{17} } }$ ) = P(Z > -0.39) = P(Z < 0.39)