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balandron [24]
3 years ago
9

2x^2 + 4x +7 quadratic formula

Mathematics
1 answer:
marissa [1.9K]3 years ago
7 0

Answer:

Step-by-step explanation:

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Factorise x^2+11x+18
Semenov [28]

Answer:

(x + 9)(x + 2 )

Step-by-step explanation:

Sum =11

Product = 18

Factors = 9 , 2

When you multiply (9*2 = 18) and when you add (9 +2 = 11).

x² + 11x + 18 = x² + 9x + 2x + (9*2)

                   =x(x + 9) + 2(x + 9)

                  = (x + 9)(x + 2 )

4 0
3 years ago
Read 2 more answers
Use the Pythagorean theorem to find y.
PilotLPTM [1.2K]

Answer:

19.1

Step-by-step explanation:

13²+14²=365

√365≈ 19.1

8 0
3 years ago
How many different symbols can be represented by In Morse code, symbols are represented by variable-length sequences of dots and
larisa86 [58]

Answer:

126 different symbols can be represented in Morse code

Step-by-step explanation:

We need to sum up the number of sequences using one single place, two places, three places, four places and so on until sequences of six places (dots and dashes).

For each case we use the fundamental counting principle.

For one single place we may have 2 possible sequences (a dash or a dot)

For two places (example: .. or ._) we may have 2*2 sequences, since each place may be filled with either dash or dot (2 possible ways) and then we multiply the ways each place can be filled, thus 2^2

Similarly, for three places we may have 2*2*2 sequences, thus 2^3

For four places we may have 2*2*2*2 sequences, thus 2^4

And so on.  

So, notice the total up to arrangements of six symbols, is:

2+2^2+2^3+2^4+2^5+2^6=126

5 0
3 years ago
What’s the answer I don’t know how to do it
weeeeeb [17]
The answer would be 5. If you look at the table, look at what they are multiplying by. If you don't know how to do that, all you do is divide the bigger number by the smaller one and then you will get your answer

Hope this helps :)
8 0
3 years ago
the ratio of length and breadth of a piece of land is 5:3 and its breadth is 48m. find the perimeter and area of the land.
Marizza181 [45]

Answer:

256 m and 3840 m²

Step-by-step explanation:

The 3 part of the ratio represents 48 m , then

48m ÷ 3 = 16 m ← value of 1 part of the ratio, so

5 parts = 5 × 16 m = 80 m

Then breadth = 48 m and length = 80 m

perimeter = 2l + 2b = 2(80) + 2(48) = 160 + 96 = 256 m

area = lb = 80 × 48 = 3840 m²

4 0
3 years ago
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