What's the measure for B

Mathematics

1 answer:

Ulleksa [173]3 years ago

7 0

This diagram doesn't make sense considering triangles have 180 degrees but as far as I can tell, there is no law in my math.

Because the unknown angles in the bottom triangle are the same as the angles in the top triangle, 4x must equal 2x+156
4x=2x+156
minus 2x from each side:
2x=156
2x is in the equation so B = 156+156 or 312.

Hope this helps :)

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How is heat included in the equation of an endothermic reaction? D. Heat is crossed out in the products of the equation. C. Heat

xxMikexx [17]

The correct answer for the given question is B. Heat is written as a reactant in the equation.

<h3>What is endothermic reaction?</h3>

An endothermic reaction is a reaction in which is reactants absorbs heat from the surrounding to give the product or heat supplied is the reactant.

Suppose if A and B are reactants that forms product C and D,

and H be the heat absorbed or supplies to the reactants.

Then for an endothermic reaction we can write-

A + B + Heat ---> C + D

Since, Heat is absorbed at the reactant side then it is called as endothermic reaction.

Hence,the correct answer for the given question is B. Heat is written as a reactant in the equation.

More about endothermic reaction:

brainly.com/question/23184814

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2 years ago

A small plane and a large plane are 6.8km from each other, at the same altitude (height). From an observation tower, the two air

Lemur [1.5K]

Answer:

7.9km

Step-by-step explanation:

(a)See attached for the diagram representing this situation.

(b)

In Triangle ABC

$\text{Using Law of Sines}\\\dfrac{\sin A}{a}=\dfrac{\sin C}{c} \\\dfrac{\sin A}{5.2}=\dfrac{\sin 58^\circ}{6.8} \\\sin A=5.2 \times \dfrac{\sin 58^\circ}{6.8}\\A=\arcsin (5.2 \times \dfrac{\sin 58^\circ}{6.8})\\A=40.43^\circ$

Next, we determine the value of Angle B.

$\angle A+\angle B+\angle C=180^\circ\\40.43+58+\angle B=180^\circ\\\angle B=180^\circ-(40.43+58)\\\angle B=81.57^\circ$

Finally, we find b.

$\text{Using Law of SInes}\\\dfrac{b}{\sin B}=\dfrac{c}{\sin C} \\\dfrac{b}{\sin 81.57^\circ}=\dfrac{6.8}{\sin 58^\circ} \\b=\dfrac{6.8}{\sin 58^\circ} \times \sin 81.57^\circ\\b=7.9km $ (to the nearest tenth of a kilometer)$