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4 years ago

If one gallon of paint overs 825 sq.ft how much paint is needed to cover 2640 st .ft

Mathematics

1 answer:

damaskus [11]4 years ago

5 0

If 1 gallon covers 825 sq ft then look at this :

825 times 3 gallons would cover 2,475 sq ft

825 times 4 gallons would cover 3,300 sq ft

You would need the 4 gallons to cover because 3 gallons wouldn’t be enough

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What are the ordered pairs of the

9966 [12]

Start by writing the system down, I will use $y$ to represent $f(x)$

$y=x^2-5x+3\wedge y=-3$

Substitute the fact that $y=-3$ into the first equation to get,

$-3=x^2-5x+3$

Simplify into a quadratic form ( $ax^2+bx+c=0$ ),

$x^2-5x+6=0$

Now you can use Vieta's rule which states that any quadratic equation can be written in the following form,

$x^2+x(m+n)+mn=0$

which then must factor into

$(x+m)(x+n)=0$

And the solutions will be $m,n$ .

Clearly for small coefficients like ours $5,6$ , this is very easy to figure out. To get 5 and 6 we simply say that $m=3, n=2$ .

This fits the definition as $5=3+2$ and $6=2\cdot3$ .

So as mentioned, solutions will equal to $m=3, n=2$ but these are just x-values in the solution pairs of a form $(x,y)$ .

To get y-values we must substitute 3 for x in the original equation and then also 2 for x in the original equation. Luckily we already know that substituting either of the two numbers yields a zero.

So the solution pairs are $(2,0)$ and $(3,0)$ .

Hope this helps :)

5 0

3 years ago

How can you represent and summarize data in a dot plot?

krek1111 [17]

In a dot plot, each one of the dots represents a value in the data set. When there are multiple values at a particular number, the dots just get stacked on top of each other. Using the dots in the plot, you can find the mean, median, mode or any other statistic that you need to summarize the data.

5 0

3 years ago

Someone help me please

Alika [10]

Answer:

x = 58°

Step-by-step explanation:

The sum of the angles in Δ AHI = 180 , then

∠ AIH = 180° - (66 + 56)° = 180° - 122° = 58°

x and ∠ AIH are corresponding and are congruent , then

x = 58°

7 0

3 years ago

Are the expressions 5(x+2)-7 and 5x-5 equivalent

geniusboy [140]

Answer:

Step-by-step explanation:

5x-5 is not equivalent to 5(x+2)-7 because when you multiply out the 5 in 5(x+2)-7 you get 5x+10-7, which simplifies to 5x+3.

5x-5 ≠ 5x+3

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3 years ago

Whats one third of 39,900

o-na [289]

1/3 of 39,900 equals 1/3*39900

(1/3)*(39900/1)= 39900/3

39900/3= 13300

Final answer: 13,300

6 0

3 years ago