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velikii [3]
3 years ago
11

I need to show work and Idk how for 2 or 3. The -5,-2 and 8,3 is the answers just need work shown thanks

Mathematics
1 answer:
prisoha [69]3 years ago
3 0
#2
2x - 4y = -2
2x + 3y = -16
------------------subtract
-7y = 14
y = 14/-7
y = -2

2x - 4y = -2
2x - 4(-2) = -2
2x + 8 = -2
2x = -2 -8
2x = -10
x = -10/2
x = -5
answer x = -2 and y = -5

check:

2(-5)- 4(-2) = -2
-10 +8 = -2
-2 = -2.....true

2x + 3y = -16
2(-5)+3(-2) = -16
-10 + (-6) = -16
-16 = -16...true


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write an expression to represent the area of a pool whose length is 5x + 1 unit and the width is 10 units
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Answer:

Perimeter = 12.0 m

Step-by-step explanation:

Perimeter = AB + AC + BC

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Use trigonometric functions to find AC and BC respectively.

✔️Find AC:

Reference angle = 53°

Opposite side length = AC

Hypotenuse = 5 m

Apply SOH, which is:

Sin 53 = Opp/Hyp

Sin 53 = AC/5

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✔️Find BC:

Reference Angle = 53

Hypotenuse = 5 m

Adjacent = BC

Apply CAH, which is:

Cos 53 = Adj/Hyp

Cos 53 = BC/5

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Step-by-step explanation:

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