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Fantom [35]
3 years ago
8

Factor completely. x^2-3x-28

Mathematics
2 answers:
Mars2501 [29]3 years ago
4 0

Answer:

= (x+4) (x-7)

Step-by-step explanation:

x²-3x -28

Product = -28

Sum = -3

numbers = -7 and 4

Thus;

x²- 3x -28 ; replacing -3x with -7x and 4x

x²-7x +4x -28

x(x-7) + 4(x-7)

<u>= (x+4) (x-7) </u>

solong [7]3 years ago
4 0

Answer:

(x-7)(x+4)

Step-by-step explanation:

We have given an expression.

x²-3x-28

We have to factorize given expression.

Split the middle term of above expression so that the sum of two term should be  -3 and their product be -28.

x²-7x+4x-28

Making groups and taking common , we have

x(x-7)+4(x-7)

Taking (x-7) as common, we have

(x-7)(x+4) which is the answer.

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At a particular swim meet, 10 points were awarded for each first-place finish, 8 points for second, and 7 points for third.
solniwko [45]

Answer:

So in each high-school has a first, second and third, and so as the question says, they give 10 points for the first, so get the first and times it by 10 so for example Rosewood high-school had 3 firsts so 3x10=30 and thts the solution to all of them so after getting the 3 answers for each high-school add each school up and find ur answer.Washington high school is 142 points Johnson high school is 159 points

Roosevelt high school is 116

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P.S.Please check the answer I'm not a professional

5 0
4 years ago
This don’t make no sense anyone understand and if u do help plz
Bingel [31]

1. x = 0 and y = 3

2. x = 2 and y = 7

3. x = 3 and y = 9

4. x = 5 and y = 13

7 0
3 years ago
$149 MP3 player 40% discount
MatroZZZ [7]

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5 0
3 years ago
Please answer #s 7,11,12, and 13 thanks please really quick
soldier1979 [14.2K]

7) Area trapezoid = (B+b).H/2, but the Median is equal to (B+b)./ 2

84 =12 . H ==> H = 84/12 ==> H = 7


11) Area Equilateral triangle inscribe in a cercle with Radius R = 2√3

Area = (B.. Altitude) / 2. Calculate H, the altitude. The altitude in an equilateral triangle bisects the opposite side. Apply Pythagoras
(2√3)² = (√3)² + H² ==> 12 = 3 + H² ==> H² = 9 & H = 3
Hence Are = (2√3 x 3) /2 ==> 3√3 unit² or 5.2 unit²

12) Area of regular hexagone with perimeter =12

regular hexagone  is formed with 6 equilateral triangles with
each side =12/6 = 2 units
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13) a) Circumference of a circle : 2πR==> 2π(30) =60π = 188.4
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5 0
3 years ago
Factor completely 15a^2b-10ab^2
ozzi

Find the Greatest Common Factor (GCF)

GCF = 5ab

Factor out the GCF (Write the GCF first. Then, in parentheses, divide each term by the GCF.)

5ab(15a^b/5ab + -10ab^2/5ab)

Simplify each term in parentheses

<u>5ab(3a - 2b)</u>

6 0
3 years ago
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