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3 years ago

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Solve the system of equations.in this form: (x, y) -5y + 8x = -18 5y + 2x = 58

2 answers:

GrogVix [38]3 years ago

8 0

the answers are x=4 and y=10

Gre4nikov [31]3 years ago

5 0

If we add the equations it looks like
-5y + 8x + 5y + 2x = -18+58
so 10x=40
so x=40/10=4
now let's replace x by 4 in the second equation
5y +2*4=58
5y=58-2*4=58-8=50
so y=50/5=10
so (x, y) = (2, 10)

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(0,5)(4,0)
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slope(m) = -5/4
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now we sub and find b, the y int
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3 years ago

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Vladimir79 [104]

Answer:

<h2>0</h2>

Step-by-step explanation:

$30x = 30 - 30$

$= > 30x = 0$

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2 years ago

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katrin2010 [14]

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Step-by-step explanation:

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3 years ago

An octagonal swimming pool has a base area of 22 square feet The pool is 3 feet deep How many cubic feet of water can the pool h

LenKa [72]

The pool can hold 65.84 ft³ of water

<u>Explanation:</u>

Given:

Shape of pool = octagonal

Base area of the pool = 22 ft²

Depth of the pool = 3 feet

Volume, V = ?

We know:

Area of octagon = 2 ( 1 + √2) a²

22 ft² = 2 ( 1 + √2 ) a²

$\frac{11}{1+\sqrt{2} } = a^2$

a² = $\frac{11}{2.42}$

a² = 4.55

a = 2.132 ft

Side length of the octagon is 2.132 ft

We know:

Volume of octagon = $2(1+\sqrt{2} ) X (a)^2 X h$

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3 years ago

You earn three dollars an hour as a waitress after working three hours you earn 12 five and seven dollars in tips how much money

NikAS [45]

Answer:

The waitress earned a total of 33 dollars

Step-by-step explanation:

Step 1: Determine total earnings from wages;

Total earnings from wages=Earnings per hour×number of hours worked

where;

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replacing;

Total earnings from wages=(3×3)=9 dollars

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Step 3: Calculate total money earned

Total money earned=Total earnings from tips+total earnings from wages

where;

Total earnings from tips=24 dollars

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replacing;

Total money earned=(9+24)=33 dollars

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