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Sophie [7]
3 years ago
15

What is 2x6+14+15+27-2

Mathematics
2 answers:
katrin2010 [14]3 years ago
6 0
The answer is 66. 2*6 = 12. 12+ 14 = 26. 26 + 15 = 41. 41 + 27 = 68. 68 - 2 = 66.
Andrews [41]3 years ago
5 0
Use a calculator kkkkk
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Step-by-step explanation:

35percent was yonger

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1) −6k + 7k 2) 12r − 8 − 12 3) n − 10 + 9n − 3 4) −4x − 10x
crimeas [40]

Step-by-step explanation:

I assume we are simplifying

1) -6k+7k = k

2) 12r-8-12 = 12r-20

3) n-10+9n-3 = 10n-13

4) -4x-10x = -14x

7 0
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How here needs help i m a teacher that helps answer this Math Quiz
sweet [91]

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The mean is 254.5

Step-by-step explanation:

Add up all the numbers then divide by how many numbers there are.

5 0
2 years ago
Read 2 more answers
How to find the value of the combination? Show your work! Thansk!
elena-14-01-66 [18.8K]

Answer:

A

Step-by-step explanation:

Using the definition

nC_{r} = \frac{n!}{r!(n-r)!}

where n! = n(n - 1)(n - 2).... × 3 × 2 × 1

Then evaluating numerator and denominator

10C_{3}

= \frac{10!}{3!(7!)}

= \frac{10(9)(8)(7)(6)(5)(4)(3)(2)(1)}{3(2)(1)(7(6)(5)(4)(3)(2)(1)}

Cancel 7(6)(5)(4)(3)(2)(1) on numerator/ denominator, leaving

= \frac{10(9)(8)}{3(2)} = \frac{720}{6} = 120

-------------------------------------------------------------------------------------

6C_{4}

= \frac{6!}{4!(2!)}

= \frac{6(5)(4)(3)(2)(1)}{4(3)(2)(1)(2)}

Cancel 4(3)(2)(1) on numerator/ denominator, leaving

\frac{6(5)}{2} = \frac{30}{2} = 15

-------------------------------------------------------------------------------------

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4 0
3 years ago
Im giving 100 Points to anyone who could solve this for me please.
myrzilka [38]

Answer:

AB = 27.2

BC = 33.5

AC = 50.4

∠A = 38°

∠ABC = 112°

Step-by-step explanation:

<u>Trigonometric ratios</u>

\sf \sin(\theta)=\dfrac{O}{H}\quad\cos(\theta)=\dfrac{A}{H}\quad\tan(\theta)=\dfrac{O}{A}

where:

  • \theta is the angle
  • O is the side opposite the angle
  • A is the side adjacent the angle
  • H is the hypotenuse (the side opposite the right angle)

\implies \sf \cos(30^{\circ})=\dfrac{29}{BC}

\implies \sf BC=\dfrac{29}{\cos(30^{\circ})}

\implies \sf BC=\dfrac{58\sqrt{3}}{3}=33.5\:(nearest\:tenth)

\implies \sf \tan(30^{\circ})=\dfrac{BD}{29}

\implies \sf BD=29\tan(30^{\circ})

\implies \sf BD=\dfrac{29\sqrt{3}}{3}

\implies \sf \sin(38^{\circ})=\dfrac{BD}{AB}

\implies \sf AB=\dfrac{\dfrac{29\sqrt{3}}{3}}{\sin(38^{\circ})}

\implies \sf AB=27.2\:(nearest\:tenth)

\implies \sf \tan(38^{\circ})=\dfrac{BD}{AD}

\implies \sf AD=\dfrac{\dfrac{29\sqrt{3}}{3}}{\tan(38^{\circ})}

\implies \sf AD=21.4\:(nearest\:tenth)

\implies \sf AC=AD+DC=21.4+29=50.4

The interior angles of a triangle sum to 180°

⇒ ∠A + 52° + 90° = 180°

⇒ ∠A = 180° - 90° - 52°

⇒ ∠A = 38°

⇒ ∠ABC + 38° + 30° = 180°

⇒ ∠ABC = 180° - 38° - 30°

⇒ ∠ABC = 112°

**I have checked the measures using a graphing programme - see attached**

8 0
2 years ago
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