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3 years ago

Given f(x) = 10 - 2x, find f(7).

Mathematics

1 answer:

Dmitry_Shevchenko [17]3 years ago

7 0

Answer:

-4

Step-by-step explanation:

f(x) = 10 - 2x,

Let x= 7

f(7) = 10 2(7)

= 10-14

= -4

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3 years ago

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3 years ago

Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea

Anika [276]

Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with

mean $\mu = 4$ and standard deviation $\sigma = 0.78$

If the company wishes to replace no more than 10% of the printers.

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Solution :

Using Z- table,

Z value corresponding to 10% or 0.10 = -1.28.

Applying z-score formula,

$z=\frac{x-\mu}{\sigma}$

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$x=(z\times \sigma)+\mu$

Substitute the values,

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$x=-0.9984+4$

$x=3.0016$

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3 years ago

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3 years ago

Sara made 8 necklaces. She used 9 beads on each necklace. The beads came in bags of 6 each. How many bags

motikmotik

Answer:

12 bags

Step-by-step explanation:

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