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Darina [25.2K]
2 years ago
6

Factorise this pleasee x2 + 4x -45

Mathematics
1 answer:
Luden [163]2 years ago
4 0

Answer:

(x - 5)(x + 9)

Step-by-step explanation:

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The weights of a bat in a zoo are normally distributed with a mean of 2.2 pounds and a standard deviation of 0.3 pounds. About w
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The correct answer for the question that is being presented above is this one: "B. 68%." The weights of a bat in a zoo are normally distributed with a mean of 2.2 pounds and a standard deviation of 0.3 pounds. The percent of the bats at the zoo that weigh 1.9 pound and 2.5 pounds is <span>B. 68%</span>
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The Thomas Supply Company Inc. is a distributor of gas-powered generators. As with any business, the length of time customers ta
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Answer:

The answer is below

Step-by-step explanation:

When computing quartile and decile, the data must be arranged in ascending order.

Given the data points:

13 13 13 20 26 26 29 31 34 34 35 35 36 37 38  41 41 41 42 43 46 47 48 49 53 55 56 62 67 82

The numbers are arranged in ascending order. The total number of terms is 30.

a)

First \ quartile(Q_1)=\frac{1}{4}(n+1)^{th}\  term\\\\where\ n=number\ of\ terms. Hence:\\\\Q_1=\frac{1}{4}(30+1)=7.75^{th}\ term=average\ of\ 7th\ and\ 8th\ term=\frac{29+31}{2} =30\\\\Q_1=30\\\\Third \ quartile(Q_3)=\frac{3}{4}(n+1)^{th}\  term\\\\Q_3=\frac{3}{4}(30+1)=23.25^{th}\ term=average\ of\ 23rd\ and\ 24th\ term=\frac{48+49}{2} =48.5\\\\Q_3=48.5

b)

Second \ decile(D_2)=\frac{2}{10}(n+1)^{th}\  term\\\\where\ n=number\ of\ terms. Hence:\\\\D_2=\frac{2}{10}(30+1)=6.2^{th}\ term=average\ of\ 6th\ and\ 7th\ term=\frac{26+29}{2} =27.5\\\\D_2=27.5\\\\\\Eight \ decile(D_8)=\frac{8}{10}(n+1)^{th}\  term=\frac{8}{10}(30+1)=24.8^{th}\ term\\=average\ of\ 24th\ and\ 25th\ term=\frac{49+53}{2} =51\\\\D_8=51

6 0
3 years ago
Landon is building new bookshelves for his bookstore's new mystery section. Each shelf can hold 38
Novosadov [1.4K]

Answer:

33

Step-by-step explanation:

1254 divided by 38 is 33

7 0
3 years ago
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Ashley has 11 pills. She has to take two or three pills each day. In how many different ways can she finish taking all of her pi
tankabanditka [31]
Taking them at breakfast, lunch, and dinner
4 0
2 years ago
Please answer circle theorem question.<br> Many thx.
pogonyaev

Answer:

x = 125

Step-by-step explanation:

Tangents from an external point to a circle are congruent , that is

CA = CB

Then Δ ABC is isosceles with base angles being congruent

∠ BAC = ∠ ABC = \frac{180-70}{2} = \frac{110}{2} = 55°

∠ ABC and x are adjacent angles on a straight line and sum to 180° , so

x = 180° - 55° = 125°

Then x = 125

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2 years ago
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