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Leno4ka [110]
3 years ago
7

10.045+2.673+105.95 to the nearest whole number and then estimate the sum

Mathematics
1 answer:
horsena [70]3 years ago
5 0

Answer:

119

Step-by-step explanation:

The nearest whole numbers from those listed are

10

3

106

The estimated sum = 119

The actual sum is 118.668

When you are doing a test, being able to estimate is a very powerful skill. 119 is close enough to the actual answer that you know your actual answer is likely correct.

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The mean score on a physics test was 75 points. Amy’s score was 67 points, which was 2 standard deviations below the mean.
Marrrta [24]

Answer:

16

Step-by-step explanation:

3 0
3 years ago
A group of adults and students went on a class trip to Washington, DC. The number of male students was 1 more than 7 times the n
liberstina [14]
Given:
adults = x
male = 7x + 1
female = (7x + 1)/2
total number of people = 82

x + (7x + 1) + [(7x +1)/2] = 82
2x/2 + (14x + 2)/2 + (7x + 1)/2 = 82
2x + 14x + 2 + 7x + 1 = 82 * 2
23x + 3 = 164
23x = 164 - 3
23x = 161
x = 161/23
x = 7

adults = x = 7
males = 7x + 1 = 7(7) + 1 = 49 + 1 = 50
females = (7x+1)/2 = 50/2 = 25

7 + 50 + 25 = 82

6 0
3 years ago
Assume that the number of watches produced every hour is normally distributed with a mean of 500 and a standard deviation of 100
horsena [70]
To evaluate the <span>probability that in a randomly selected hour the number of watches produced is greater than 500 we proceed as follows:
z=(x-</span>μ<span>)/</span>σ
where:
x=500
μ=500
σ=100
thus
z=(500-500)/200=0

Thus:
P(x>500)=1-P(x<500)=1-P(z<0)=1-0.5=0.5

Answer: 0.5~50%
8 0
3 years ago
Read 2 more answers
At a recent party it cost $9.50 for refreshments for 10 guest.at this rate,how much would it cost to have refreshment for 80 gue
Talja [164]
For 80 guests you will need 80/10 = 8 times more than for 10 guests:

8*9.50 = $76

Refreshment for 80 guests costs $76.
8 0
3 years ago
What is the slope of a line perpendicular to y = 8 - 2/7x?
Salsk061 [2.6K]
The slope of the current line is -2/7. To find the slope of the line perpendicular to it, find the negative reciprocal of the slope. So it would be 7/2. The y intercept or the b would remain the same so the equation would be y=7/2x+8. Hope this helps. 
7 0
3 years ago
Read 2 more answers
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