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mamaluj [8]
4 years ago
15

Four less than a half of a number is 5 find the number

Mathematics
1 answer:
maw [93]4 years ago
4 0
1/2n - 4 = 5
1/2n = 5 + 4
1/2n = 9
n = 9 * 2
n = 18 <==
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Residents of the town of Maple Grove who are connected to the municipal water supply are billed a fixed amount monthly plus a ch
Strike441 [17]

9514 1404 393

Answer:

  • $0.04 per cubic foot
  • c(w) = 0.04w +80
  • 3400 cubic feet

Step-by-step explanation:

(a, b) We are given two pairs of values:

 (w, c) = (1900, 156) and (2600, 184)

so we can write the equation of the relationship using the 2-point form of the equation of a line.

  y = (y2 -y1)/(x2 -x1)(x -x1) +y1

  c = (184 -156)/(2600 -1900)(w -1900) +156 . . . . . substitute given points

  c = 28/700(w -1900) +156

  c(w) = 0.04w +80

The charge per cubic foot is $0.04.

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(c) For a bill of $216, the amount of water used is ...

  216 = 0.04w +80

  136 = 0.04w

  3400 = w

Use of 3400 cubic feet of water would lead to a bill of $216.

4 0
3 years ago
Solving Quadratic Functions
muminat
The answer will be none
6 0
3 years ago
4. Lincoln began his speech, “Four score and seven years ago....” How many years is four score and seven? (Hint: A score is 20 y
chubhunter [2.5K]
87 years I think…. If a score is 20 years and four scores have passed you do 4x20 = 80. 80 plus the seven 80+7 = 87
4 0
3 years ago
Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a st
Sindrei [870]
First, to find out the number of students who scored below Amanda, we must find the z-score value of Amanda's score using the formula below.

Z = \frac{(\chi - \mu)}{\sigma}

where Z is the z-score, Χ is the expected average value, μ is the mean of Χ, and δ is the standard deviation. Thus, we have

Z = \frac{(940 - 850)}{\sqrt{100}}
Z = 0.90

Thus, using the z-table, we have P(Z<0.90) = 0.8159. Since we have wanted to find the number of students who scored below Amanda, then from the whole, we have (1 - 0.8159) = 0.1841. That means, out of 1000 students, 0.1841 of them scored below Amanda. Thus, we have (0.184)(1000) = 184. 

Answer: 184 students
7 0
4 years ago
Solve this equation for x. Round your answer to the nearest hundredth. 0.58=log x
FromTheMoon [43]

The logarithm and the exponential are inverse function:

\log(e^x)=e^{\log(x)}=x

So, we have

0.58=\log(x)\iff e^{0.58}=e^{\log(x)}=x

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x=e^{0.58}\approx 1.79

5 0
3 years ago
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