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Ipatiy [6.2K]
3 years ago
14

A ceiling 6 feet by 7 feet can be painted for $52. find the cost of painting a ceiling 18 feet by 21 feet, all things being equa

l except the dimensions
Mathematics
1 answer:
kykrilka [37]3 years ago
5 0
6 feet * 7 feet = 42 feet²

18 feet * 21 feet = 378 feet²

42 feet²  was painted for $52

1 feet²  will be painted for $52/42

378 feet² will then be painted for:  ($52/42) * 378

                                                       = $468

Hence 18 feet by 21 feet will be painted for $468

Hope this helps.
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Use the information given to enter an equation in standard form. (−1, 1) and (0, 6) are on the line.
liubo4ka [24]

Answer: -5x+y=6

Step-by-step explanation:

Given

Points on line (-1,1)\ \text{and}\ (0,6)

The standard form of an equation is ax+by=c

Using the two-point form of a line

\Rightarrow \dfrac{y-1}{x+1}=\dfrac{6-1}{0+1}\\\Rightarrow \dfrac{y-1}{x+1}=\dfrac{5}{1}\\\Rightarrow y-1=5x+5\\\Rightarrow y-5x=6\\\Rightarrow -5x+y=6

7 0
3 years ago
3 +5.2.c = 1 - 2.87
Paul [167]

Answer:

-0.0936538462

Step-by-step explanation:

Start by solving the right side of the equation

1 - 2.87 = -1.87

now we have:

3 + 5.2c = -1.87

subtract 3 from both sides to get:

5.2c = -4.87

divide both sides by 5.2 to get:

-0.0936538462

hope that's what you're looking for! :)

6 0
3 years ago
Elijah is 2 years less than twice Michael's age. If Elijah is 18, how old is Michael?<br>​
jekas [21]
Elijah is 34 years of age.

>Twice of Michael’s age is 36
>2 years less than twice of Michael’s age is 36-2.
>36-2=34

34 is your answer/
6 0
2 years ago
If the coefficient of determination is 0.233, what percentage of the variation in the data about the regression line is explaine
ddd [48]

We need the coefficient of determination definition

The coefficient of determination (R²) is a number between 0 and 1 that measures how well a statistical model predicts an outcome. You can interpret the R² as the proportion of variation in the dependent variable that is predicted by the statistical model

So if we have a coefficient of determination of 0.233 we multiply by 100 to get the percentage

Answer: 23.3%

3 0
2 years ago
Can some one help me with this
m_a_m_a [10]

The answer is 20 because if there is four options that you can spin on and he has spinned 80 times 8÷4 is 20

5 0
3 years ago
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