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-BARSIC- [3]
4 years ago
8

it takes 1/2 of a box of nails to build a bird house if you wanted to build 5 bird houses how many boxes would you need​

Mathematics
1 answer:
dedylja [7]4 years ago
7 0

Answer:

You would need 2.5

Step-by-step explanation:

You can use a porportion to solve.

\frac{.5}{1} = \frac{x}{5} (cross multiply and solve)

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The height of water shooting from a fountain is modeled by the function f(x) = −0.2x2 − 2.8x − 5.4 where x is the distance from
balandron [24]
Start by setting the function equal to 0 and then moving the -5.4 over to the other side of the equals sign.  -.2 x^{2} -2.8x=5.4.  The first rule for completing the square is that the leading coefficient be a +1.  Ours is a -.2.  So we need to factor it out. -.2( x^{2} +14x)=5.4.  Now we will take half the linear term, square it, and add it to both sides.  Our linear term is 14.  Half of 14 is 7, and 7 squared is 49.  So we add 49 in to the left side just fine, but we cannot forget about that -.2 hanging around out front as a multiplier.  What we have actually "added" in is -.2*49 which is -9.8.  Now here's what we have after all that: -.2( x^{2} +14x+49)=5.4-9.8.  In that process, we have created a perfect square binomial on the left.  Along with expressing that binomial we will do the math on the right: -.2(x+7) ^{2} =-4.4.  Now we will move the -4.4 back over by addition, and it will then be apparent as to what our vertex is.  The y coordinate of the vertex will give us the max height of the water.  -.2(x+7) +4.4=y.  As you can see, our work matches choice C from above.
4 0
3 years ago
Find me midpoint of -9 and 6
Ymorist [56]
The answer I believe is -2. Thank you come again
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Which set of ordered pairs do NOT represent a function?
Rainbow [258]

Answer:

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Step-by-step explanation:

(4,-2)

(4,2)

4 is mentioned twice and every input( x value) can have only one output ( y-value)

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W3* 5 = 15. then 15 + 5 equals what number? 3 05 08 15​
Anastaziya [24]

Answer:

Hello

ur answer is

15+5= 20

Step-by-step explanation:

thanks hope it helps

6 0
3 years ago
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