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Gelneren [198K]
3 years ago
13

X^2 - 7x - 6 = 0 Solve using the quadratic formula

Mathematics
1 answer:
Gennadij [26K]3 years ago
6 0
X=7.77 and -0.77 but I accidentally posted the other thing without attaching the working out sorry
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A house worth £80,000 in January 2012 is set to decrease in value by 7% per year.
kramer
The answer would be 59,844 or around that number
7 0
3 years ago
NEED HELP ASAP!! I'm doing trigonometry and I've been stuck on this problem I don't really understand it, if you could help that
Tems11 [23]

Answer:

6.1

Step-by-step explanation:

Draw a picture of an equilateral triangle.  Cut the triangle in half, so that you get two 30-60-90 triangles.  The area of these smaller triangles is 8 square inches.

The short leg of these triangles (the base) is half the side length: ½ s.

According to properties of 30-60-90 triangles, the long leg (the height) is √3 times the short leg: ½ s√3.

Area of a triangle is half the base times the height:

A = ½bh

8 = ½ (½ s) (½ s√3)

8 = ⅛ s²√3

64 = s²√3

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s = √(64/√3)

s ≈ 6.1

4 0
4 years ago
Which expression is equivalent to 4(3+5)-3.94?
Anna007 [38]

Answer:

4(3 + 5) - 3.94 \\ 4 \times 8 - 3.94 \\ 32 - 3.94 \\  = 28.06

3 0
3 years ago
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