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3 years ago

How to figúrate out if x makes the equation true

Mathematics

2 answers:

marissa [1.9K]3 years ago

7 0

You plug in the number for x and if it is equal to the solution then it is correct

fomenos3 years ago

7 0

Answer:

Someone already explained this and their right but I wanted to add an example.

Lets say you have the equation 4x+3=19.

You solve it by subtracting three from both sides to isolate x which gives you 4x=16 and dividing both sides by 4 to get you an answer of 4.

Now, you know x=4 but you're not completely sure so you can check it.

Substitute the known value of x into the original equation and check to see if both sides equal.

4(4)+3=19

16+3=19

19=19

This checks out so your answer is correct.

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In ΔHIJ, the measure of ∠J=90°, HI = 8 feet, and JH = 1.9 feet. Find the measure of ∠H to the nearest tenth of a degree.

artcher [175]

Answer:

21.9°

Step-by-step explanation:

In ΔHIJ, the measure of ∠J=90°, HI = 8 feet, and JH = 1.9 feet. Find the measure of ∠H to the nearest tenth of a degree.

We solve this above question using the Sine rule

a/sin A = b/sin B

In ΔHIJ, the measure of ∠J=90°, HI = 8 feet, and JH = 1.9 feet.

Hence:

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Cross Multiply

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