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Alex_Xolod [135]
2 years ago
5

At a convention of monsters, 2/5 have no horns, 1/7 have one horn, 1/3 have two horns, and the remaining 26 have three or more h

orns. How many monsters are attending the convention

Mathematics
2 answers:
svetlana [45]2 years ago
7 0
I hope this helps.....

Papessa [141]2 years ago
4 0
Let x be the number of monsters:
a) number of 0 horn = 2x/5
b) number of 1 horn = x/7
c) number of 2 horns = x/3

The 26 remaining monsters are:

(x) - (2x/5 + x/7 + x/3) = 26, solve for x,

x - 2x/5 - x/7 - x/3 = 26, reduce to same denominator:(105)

x - 92x/105 = 2730/105

and x = 210 monsters
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lakkis [162]

Markup is the amount added to the cost price of goods to cover overhead and profit.

Sue’s Corner Market has a markup of 60% on bottled water.

Let us say original price was $x.

Now price after markup is $2.

So we can make an equation like:

original price + markup price = price after markup

x + 60% of x =2

x + 0.6x =2

1.6x =2

dividing both sides by 1.6

x= 1.25

So original price was 1.25 dollars.

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2 years ago
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Which statement is true about the equations –3x + 4y = 12 and One-fourthx – One-thirdy = 1?
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Answer:

first one

Step-by-step explanation:

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water will be both added to and drained from a bathtub at the same time for 5 minutes. the total amount of water added to the ba
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There would be 12 litres in the tub after 4 minutes
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If M is the midpoint of XY, find the coordinates of X if M(-3,-1) and Y(-8,6).
NeTakaya

Answer:

(2, -8)

Step-by-step explanation:

The coordinates of M are the average of the coordinates of X and Y.

-3 = (x + -8) / 2

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Anna set up a lemonade stand on her block over the summer. She recorded each day’s high temperature and the number of cups of le
Alexxx [7]

Answer:

Residual = -2

The negative residual value indicates that the data point lies below the regression line.

Step-by-step explanation:

We are given a linear regression model that relates daily high temperature, in degrees Fahrenheit and number of lemonade cups sold.

y = -34+ \frac{3}{5}  x

Where y is the number of cups sold and x is the daily temperature in Fahrenheit.

Residual value:

A residual value basically shows the position of a data point with respect to the regression line.

A residual value of 0 is desired which means that the regression line best fits the data.

The Residual value is calculated by

Residual = Observed value - Predicted value

The predicted value of number of lemonade cups is obtained as

y = -34+ \frac{3}{5} (95)\\\\y = -34+ 3 (19)\\\\y = -34+ 57\\\\y = 23

So the predicted value of number of lemonade cups is 23 and the observed value is 21 so the residual value is

Residual = Observed value - Predicted value

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Residual = -2

The negative residual value indicates that the data point lies below the regression line.

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