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Alla [95]
3 years ago
10

Regan earned a total of 15 by selling 5 cups of lemonade how many cups of lemonade does Reagan need to sell and altar on $42 ass

ume the relationship is directly proportional

Mathematics
1 answer:
Gemiola [76]3 years ago
8 0
Idk if its right sorry

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Five times the difference of twice a number and eleven is negative twenty-five. Find the number.
Ilia_Sergeevich [38]
Let x be the number.
The equation would be: 5 (2x - 11) = -25
Multiply 2x - 11 by 5 so that it is 10x - 55
Now, move the -55 to the other side of the equation so 10x = -25 + 55
Subtract so 10x = 30
Now divide 30 by 10 to find x.
x = 3
4 0
3 years ago
According to a random sample taken at 12 A.M., body temperatures of healthy adults have a bell-shaped distribution with a mean o
Katarina [22]

Chebyshev’s Theorem establishes that at least 1 - 1/k²  of the population lie among k standard deviations from the mean.

This means that for k = 2,  1 - 1/4 = 0.75. In other words, 75% of the total population would be the percentage of healthy adults with body temperatures that are within 2standard deviations of the mean.

The maximum value of that range would be simply  μ + 2s, where μ is the mean and s the standard deviation. In the same way, the minimum value would be μ - 2s:

maximum = μ + 2s = 98.16˚F + 2*0.56˚F = 99.28˚F

minimum = μ - 2s = 98.16˚F - 2*0.56˚F  = 97.04˚F

In summary, at least 75% of the amount of healthy adults have a body temperature within 2 standard deviations of 98.16˚F, that is to say, a body temperature between 97.04˚F and 99.28˚F.

5 0
3 years ago
4x-2<br> x=5<br>can someone help me with this?​
kondaur [170]

Answer:

x= 5/2

Step-by-step explanation:

3 0
3 years ago
Please hurry lol
agasfer [191]

Answer:

what grade are u

Step-by-step explanation:

so that I c could definetly answer it

3 0
3 years ago
A unit of electricity costs 13.2 pence. On average, tanya uses 90 units of electricity per week. She pays for her bill in 12 wee
Scrat [10]

Her electricity bill will be of 14256 pence.

<em><u>Explanation</u></em>

On average, Tanya uses 90 units of electricity per week.

So, the <u>total units of electricity in 12 weeks</u> will be: (90*12)=1080 units

One unit of electricity costs 13.2 pence.

Thus, <u>the total cost for 1080 units</u> will be:  (13.2*1080)pence= 14256 pence.

So, her electricity bill will be of 14256 pence.

7 0
3 years ago
Read 2 more answers
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