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Lisa [10]
3 years ago
15

What is 0.9(x-20)=830 Rounded to the Hundreths (second) decimal place

Mathematics
1 answer:
enot [183]3 years ago
4 0

Answer:

x= 942.22

Step-by-step explanation:

.9x-18=830

.9x=848

x=942.222222222

which will be x= 942.22

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7 0
2 years ago
Can someone help me with part b?
Tema [17]

Step-by-step explanation:

the average rate of change of a function f in an interval [x-low, x-high] is

(f(x-high) - f(x-low)) / (x-high - x-low)

the year 2000 means t = 2000-1980 = 20

the year 2015 means t = 2015-1980 = 35

so, we have

(A(35) - A(20)) / (35 - 20)

((-0.6(35)² + 37.2×35 + 243) - (-0.6(20)² + 37.2×20 + 243)) / 15

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the average change rate between 2000 and 2015 is 4.2.

that means that the use of nuclear energy in the USA increased by 4.2 billions of kilowatt hours per year during that period.

3 0
3 years ago
The mean age of 11 women in an office is 31 years old.
BlackZzzverrR [31]

Answer: 30.2

Explanation:

The mean is calculated by taking the sum of the values and dividing by the count.

For instance, for the 6 women, with the mean being 31, we can see that the ages summed to 186:

186

6

=

31

And we can do the same for the men:

116

4

=

29

And now we can combine the sum and count of the men and women to find the mean for the office:

186

+

116

10

=

302

10

=

30.2

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
TheStudent Government buys sweatshirts for $10 and sells them for $25. Find the percent of increase.
Vitek1552 [10]

Answer:

4

Step-by-step explanation:

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8 0
2 years ago
If x divided 9=9 how do u know what x is
Volgvan
X is 1 because if you times it by x it equals it number
7 0
3 years ago
Read 2 more answers
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