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WINSTONCH [101]
1 year ago
15

A construction company buys a certain number of boxes of nails depending on how many houses they plan to build in a year. They h

ave 5 boxes left over from the previous year and predict that this year they will need 3 boxes per house. Write an equation where y represents the number of boxes they need to purchase and x the number of houses they plan to build.
Mathematics
1 answer:
rusak2 [61]1 year ago
7 0

Answer:

Step-by-step explanation:

43

I dont exactly know if this is correct sorry if its wrong

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Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.
likoan [24]

Answer:

Thus, the two root of the given quadratic equation x^2+4=6x is 5.24 and 0.76 .

Step-by-step explanation:

Consider, the given Quadratic equation, x^2+4=6x

This can be written as ,  x^2-6x+4=0

We have to solve using quadratic formula,

For a given quadratic equation ax^2+bx+c=0 we can find roots using,

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}  ...........(1)

Where,  \sqrt{b^2-4ac} is the discriminant.

Here, a = 1 , b = -6 , c = 4

Substitute in (1) , we get,

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

\Rightarrow x=\frac{-(-6)\pm\sqrt{(-6)^2-4\cdot 1 \cdot (4)}}{2 \cdot 1}

\Rightarrow x=\frac{6\pm\sqrt{20}}{2}

\Rightarrow x=\frac{6\pm 2\sqrt{5}}{2}

\Rightarrow x={3\pm \sqrt{5}}

\Rightarrow x_1={3+\sqrt{5}} and \Rightarrow x_2={3-\sqrt{5}}

We know \sqrt{5}=2.23607(approx)

Substitute, we get,

\Rightarrow x_1={3+2.23607}(approx) and \Rightarrow x_2={3-2.23607}(approx)

\Rightarrow x_1={5.23607}(approx) and \Rightarrow x_2=0.76393}(approx)

Thus, the two root of the given quadratic equation x^2+4=6x is 5.24 and 0.76 .

7 0
3 years ago
Read 2 more answers
Please help !!!!!!!!!
Ainat [17]

Answer:

5

Step-by-step explanation:

3x -12 = -36

-36 ÷ -3 = 12

-7 + 12 = 5

7 0
3 years ago
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4/12 of a cake was left over if another 3/12 of the cake is eaten
inn [45]
There would be 1/12 of the cake left. 
3 0
3 years ago
Please someone help me (NO LINKS) (NO LYING)
romanna [79]
Number one 42 cubes .
6 0
3 years ago
Read 2 more answers
I dont know any of this and i was absent so i dont know anything. PLEASE HELP
Elina [12.6K]
It's pretty simple if you just read through it carefully. Here you go.   

6 0
3 years ago
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