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steposvetlana [31]
3 years ago
11

- a/6 + 7 = - 14*********************

Mathematics
1 answer:
aleksandrvk [35]3 years ago
8 0

Answer:

a=126

Step-by-step explanation:

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Which expression is equal to (x−3)(x−2)/(x+3)(x−3) ?
Gekata [30.6K]

Answer:

x−2/x+3

Step-by-step explanation:

(x−3)(x−2)/(x+3)(x−3)

so (x−3) will be cancelled from both denominator and nominator

(x−2)/(x+3)

5 0
4 years ago
Read 2 more answers
Involves sine/cosine rules
katen-ka-za [31]

Answer:

44.47 cm² (nearest hundredth)

Step-by-step explanation:

Area of ΔABC = 1/2 x base x height

⇒ 21 = 1/2 x 7 x BC

⇒ BC = 6 cm

Pythagoras' Theorem: a² + b² = c²

(where a and b are the legs, and c is the hypotenuse, of a right triangle)

⇒ AB² + BC² = AC²

⇒ 7² + 6² = AC²

⇒ AC² = 85

⇒ AC = √85 cm

Cosine rule to find length AD:

      c² = a² + b² - 2 ab cosC

⇒ DC² = AD² + AC² - 2(AD)(AC)cos(DAC)

⇒ 9.2² = AD² + (√85)² - 2(AD)(√85)cos 73°

⇒ AD²  - 5.39106...AD + 0.36 = 0

⇒ AD = 5.323442445, 0.06762541414

⇒ AD = 5.323442445

Area of a triangle ADC: (1/2)absinC

(where a and b are adjacent sides and C is the angle between them)

⇒ area = (1/2) × AC × AD × sin(DAC)

⇒ area = (1/2) × √85 × 5.323442445 × sin(73°)

⇒ area =23.4675821... cm²

Area of quadrilateral = area of ΔABC + area of ΔADC

                                   = 21 + 23.4675821...

                                   = 44.47 cm² (nearest hundredth)

4 0
2 years ago
Subtract.<br>(4x^2 + 8x - 2) - (2x^2 - 4x + 3)<br>Enter your answer, in standard form.​
vovikov84 [41]

Answer:

\large\boxed{(4x^2 + 8x - 2) - (2x^2 - 4x + 3)=2x^2+12x-5}

Step-by-step explanation:

(4x^2 + 8x - 2) - (2x^2 - 4x + 3)\\\\=4x^2 + 8x - 2 -2x^2 -(- 4x)- 3\\\\=4x^2+8x-2-2x^2+4x-3\qquad\text{combine like terms}\\\\=(4x^2-2x^2)+(8x+4x)+(-2-3)\\\\=2x^2+12x-5

5 0
3 years ago
The area of Russia is about 1.71 x 107 square kilometers. The area of Jamaica is about 1.10 x 104 square miles. How many times l
11111nata11111 [884]

Answer:

2 x 10^3 times

Step-by-step explanation:

-lukelaws

I hope I helped if I did please mark me brainliest!

3 0
2 years ago
Reupload of a question. I wasted my points on the other one.
mylen [45]
It would be ft3 because its a cone shape and you multiply the circumference by the height and you’ll get the volume
6 0
3 years ago
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