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kipiarov [429]
2 years ago
15

How do I find x and y for the problem below? -7x+2y=-13 1x-2y=11

Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
7 0
For the first one :)))))))

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1/3(m-1)=-5<br> Please help
dezoksy [38]

Answer:

m=-14 I hope this helps u

Step-by-step explanation:


6 0
3 years ago
The angle of elevation to the top of a water tower from point A on the ground is 19.9°. From point B, 50.0 feet closer to the to
zepelin [54]

Answer:

Answer in terms of a trigonometric function :

h = \frac{20tan(19.9)}{0.4-tan(19.9)}

Answer in figures

h = 190.5 feet

Step-by-step explanation:

Consider the sketch attached below to better understand the problem.

Let x be the distance between point B and the base of the water tower.

tan (19.9)=\frac{h}{50+x} ---------------equation 1\\

tan (21.8)=\frac{h}{x}----------------equation 2

From equation 2,

x =\frac{h}{tan21.8}=\frac{h}{0.4}

substituting the value of x into equation 1, we get

tan (19.9)=\frac{h}{50+(\frac{h}{0.4} )}

tan 19.9=h\times \frac{0.4}{20+h}

cross multiplying,

20\times tan(19.9) +htan(19.9)=0.4h

20tan(19.9)= h(0.4-tan(19.9))

h= \frac{20tan (19.9)}{0.4-tan (19.9)}

The height of the tower is h= \frac{20tan (19.9)}{0.4-tan (19.9)} in terms of the trig function "Tan"

The equation can simply be evaluated to get the answer in figures since the angles are given in the question

5 0
3 years ago
What does "e" stand for in y=e^x
lukranit [14]
The "e" is one of mathematical constants. It's equal to approximately 2.7. It's sometimes called Euler's number.<span />
7 0
3 years ago
Find the the measure of angle 6
hodyreva [135]
It’s 61 since it’s across
6 0
2 years ago
Read 2 more answers
7) You can buy 5 cans for green beans at the Village Market for $3.20. You can buy 10
Bad White [126]
Sam’s club because with the deal each can would be about $1.27 whereas at village market each can would be about $1.56
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3 years ago
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