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igomit [66]
3 years ago
12

The expression 100−2.5x represents the balance of Grace’s lunch account after x days. The expression 100+2.5(5−x) represents the

balance of Tim’s lunch account after x days. After how many days do the lunch accounts have the same balance?
Mathematics
1 answer:
Mars2501 [29]3 years ago
8 0

Answer:

Step-by-step explanation:

That means that the given expressions are equal.

100 - 2.5x = 100 + 2.5(5 - x)

100 - 2.5x = 100 + 12.5 - 2.5x

There is no solution to this.

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For the orchestra concert, the orchestra director has asked that everyone wear either black pants or a black skirt. Five times a
asambeis [7]

Answer:

A

Step-by-step explanation: 5x10 =50+10 =60 the number of students


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3 years ago
Read 2 more answers
An organization has members who possess IQs in the top 4% of the population. If IQs are normally distributed, with a mean of 100
murzikaleks [220]

Answer:

The minimum IQ score will be "126".

Step-by-step explanation:

The given values are:

Mean

\mu = 100

Standard deviation

\sigma=15

Now,

⇒ P(z>x)=4 \ percent \ i.e., 0.04

⇒ P(z>\frac{x- \mu}{\sigma} )=0.04

⇒ 1-P(z \leq \frac{x-100}{15})=0.04

⇒ \frac{x-100}{15}=z0.96

            =NORMDIS(z=0.96)

            =1.751

⇒ x=100+15\times 1.751

      =126.265 \ i.e., 126

7 0
3 years ago
If something is scarce it is generally
dmitriy555 [2]
Little of, not in plethora, small numbered
6 0
3 years ago
Whats the value of 4
pantera1 [17]

Answer:

Hence, the value of the digit 4 will be i.e. 40 or forty. Example 1: Work out the place value, face value and value of 6 in the number 56,523.22.

8 0
3 years ago
What is the sum of x + 9?
vovikov84 [41]
So 30/48=15/(x+9)
this could be easily solved by recognizing the proportion (the other way is usiing full  algebra and doing multiply both sides by 48(x+9) and then divide both sides by 30 then subtract 9)
30 is 2 times of 15
therefor 48 is 2 times of (x+9)
48=2 times (x+9)
divide both sides by 2
24=x+9
subtract 9
15=x

x=15

5 0
3 years ago
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