Answer:
its the 3rd choice.
Step-by-step explanation:
Firstly, we find angle BDC (180-90-30=60)
Now that we found it we can use the sine rule to find DB (which i put as an x), which is sin60/14=sin30/x, by cross multiplication, we find that its equal to a decimal number, i will use its root version to this easier, its equal to 14sqrt3/3 inches.
And now we use the pythagorean theorem to find DC, we find that it is equal to 28sqrt3/3
Now, we find angle BAC (180-90-(30+15)=45)
Again, we use the sine rule to find AB (whom i will refer to as x and from whom we will subtract DB to find the length of AD), so we cross multiply in sin45/14=sin(30+15)/x, it is equal to 14.
So since AB-DC=AD
14-(14sqrt3/3)= 5.917096231 (and we ound that to a 5.9)
The area of a cross section paralell to the base is the base
the base is 4inches by 3 inches
area is 12 square inches
perimiter is 2(L+W)=2(4+3)=2(7)=14 inches
area is 12 square inches
perimiter is 14 inches
Resolviendo una resta, veremos que el número es igual a 12.
<h3>
¿Como encontrar el número?</h3>
Definamos X como nuestro número, sabemos que cuando este número es disminuido en cuatro (es decir, le restamos 4 a nuestro número X) el resultado es 8.
Entonces, lo que tenemos que hacer es resolver la operación:
X - 4 = 8
Para resolver esto, lo que tenemos que hacer es sumar 4 en ambos lados de esta ecuación, asi obtenemos:
X - 4 + 4 = 8 + 4
X = 12
De esta forma, concluimos que nuestro número es igual a 12.
Sí quieres aprender más sobre restas:
brainly.com/question/25421984
#SPJ1
Step-by-step explanation:
Since we want to get ' p ' on left hand side , remove the number ' - 6 '.
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{ The opposite of -6 is +6 and whatever we do to one side , we must do to the another side. So, I added 6 on both sides }
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{ On the left hand side , 6-6 = 0. That's how we removed the 6 so just 'p' is left. On the right hand side , 5+6 = 11 }
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Always check your answer by substituting your answer for the variable that you solved for. This guarantees you a right answer !
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Hope I helped ! ♡
Have a wonderful day / night ! ツ
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