5x+4y=8. please i need help please

1 answer:

3 0

There should be another equation in order to solve this problem using simultaneous equations.

Otherwise, there will be more than one solution to this problem as there are different combinations of values for ( x ) & ( y ) which can be given.

For example, one answer could be:

x = 2

y = - 1 / 2

So if we substitute the values into the equation it would be as follows:

5x + 4y = 8

5 ( 2 ) + 4 ( - 1 / 2 ) = 8

10 + - 2 = 8

10 - 2 = 8

8 = 8

Another answer could be:

x = 4

y = - 3

So if we substitute the values into the equation it would be as follows:

5x + 4y = 8

5 ( 4 ) + 4 ( - 3 ) = 8

20 + - 12 = 8

20 - 12 = 8

8 = 8

As you can see, there are more than one solution for this equation. So unless the problem is asking you to just give one of various solutions and isn't asking for one definitive solution, then you will require another equation in order to solve this problem.

Hope this was helpful! <3

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Answer:

I answered the questions but that formatting is very confusing and discourages anyone for trying to answer.

The last question is confusing. If I got it wrong, tell me. I will try to answer in the comment section then.

Step-by-step explanation:

Kayson is looking at two buildings, building A and building B, at an angle of elevation of 73°. Building A is 30 feet away, and building B is 35 feet away. Which building is taller and by approximately how many feet?

$\text{tan}\theta=\frac{h_{A}}{30} \Rightarrow h_{A}=\text{tan}73\º \cdot 30 \Rightarrow h_{A}\approx 98.12 \text{ feet}$

$\text{tan}\theta=\frac{h_{B}}{35} \Rightarrow h_{B}=\text{tan}73\º \cdot 35 \Rightarrow h_{B}\approx 114.47 \text{ feet}$

$\text{Difference} \approx 16.35$

Building B is around 16.35 feet taller than building A.

A Look at the figure below: an image of a right triangle is shown with an angle labeled y If sin y° = a divided by 6 and tan y° = a divided by b, what is the value of cos y°?

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$\text{tan}(y)=\frac{a}{b}$

a is the opposite side; 6 is the hypotenuse; b is the adjacent side.

Therefore,

$\text{cos}(y)=\frac{b}{6}$

If sin f° = eight ninths and the measure of segment YW is 24 units, what is the measure of segment YX? triangle XYW in which angle W is a right angle, angle X measure f degrees, and angle Y measures d degrees.

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