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sashaice [31]
2 years ago
15

Evaluate –10 • x • 5 when x = –1. –50 –15 6 50

Mathematics
1 answer:
Rudiy272 years ago
4 0
The answer is 50 ! :-)
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Find the variation constant and an equation of variation where y varies directly as x and y=16 when x=2
Jlenok [28]

Answer:

variation constant = k = 8

equation of variation : y = 8x

Step-by-step explanation:

Any relationship of variation can be written as y = kx

where k is the variation constant.

_______________________________________

Let the equationof relation between y and x be y =kx here as well

given

y = 16 when x = 2

substituting this value in the equation y = kx

16 = k*2

=> k = 16/2 = 8

Thus,

variation constant = k = 8

equation of variation : y = 8x

5 0
3 years ago
What is the standard for of (1 7i)(3-i)?
marissa [1.9K]
3 -1i + 21i -7i2 now you have to fix the last factore because you have to change the imaginery i this would give you the answer of 3 - 1i + 21i +7 now add common factor which would give you the final answer of 3 +20i +7
7 0
3 years ago
A random sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the popula
kvasek [131]

Answer:

The sample proportion of printers used in small business is:

\hat{p}=\frac{25}{70}=0.3571

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

\hat{p} \pm z_{\frac{0.05}{2}} \sqrt{\frac{\hat{p}(1-\hat{p})}{n} }

Where:

z_{\frac{0.05}{2}}=1.96 is the critical value at 0.05 significance level

\therefore 0.3571 \pm 1.96 \sqrt{\frac{0.3571(1-0.3571)}{70} }

         0.3571 \pm 0.1122

         \left ( 0.3571 - 0.1122, 0.3571 + 0.1122 \right)

         \left(0.245,0.469 \right)

Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)



7 0
3 years ago
A new machine can make 10,000 aluminum cans three times faster than an older machine. with both machines working, 10,000 cans ca
Semmy [17]
It takes at least 12 hours for the newer machine to make 10,000 cans
5 0
3 years ago
Find the surface area
steposvetlana [31]

Answer:

should be 872 in^2

Step-by-step explanation:

6 0
1 year ago
Read 2 more answers
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