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Phoenix [80]
3 years ago
7

Write a quadratic function f whose zeros are -11 and -3

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
6 0

Answer:

y = ( x + 11 )( x + 3 )

Step-by-step explanation:

The zeros are just the points where y = 0 so create the function that when X equals the values the Y is 0

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the width of a rectangle is 12 cm less than the length the perimeter is 156 cm. Find the with and length
mamaluj [8]

We know that the perimeter of a rectangle is twice the length, plus twice the width.  

P = 2L + 2W  

We also know that the perimeter is 156.  

P = 156  

Finally, we know that the width is 12 less than the length.  

W = L - 12.  

The next thing that we do is substitute the information that we have into the original equation:  

P = 2L + 2W  

156 = 2L + 2(L - 12)  

From this point we start to solve  

156 = 2L + 2L - 24 <---we multiplied the '2' through the parenthesis  

156 + 24 = 2L + 2L - 24 + 24  

180 = 2L + 2L <--- getting like terms on same sides  

180 = 4L <---combining like terms  

180/4 = 4L/4 <--- getting like terms on same sides  

45 = L <---now we have a value for L  

Now we take the known value for L and substitute it in to our equation for W  

W = L - 12  

W = 45 - 12  

W = 33  

So now we have Length = 45 and Width = 33.

6 0
3 years ago
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John played a note on his tuba that vibrated the air 120 times per second. If you play the note for 4 seconds, how many times in
Zigmanuir [339]

480

This is this awnser because its 120 a second, for 4 seconds so 4 times 120 = 480.


4 0
3 years ago
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Period of y=2tan (2x+90) -1
krek1111 [17]
20 is the answer
I hope this help
4 0
3 years ago
What's the answer? And how do I solve this ?
noname [10]
Is that area if so the answer is 12
5 0
3 years ago
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Factorise 3x^2-22x+7
Svet_ta [14]

Answer:

(3x+7)(x+5)

Step-by-step explanation:

i think lol

3 0
3 years ago
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