3 years ago

Consider the system of equations: 3x+2y=18 and x-2y=14.

Mathematics

1 answer:

Fantom [35]3 years ago

7 0

Multiplication property of equality

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If y varies directly as x and y = 21 when x = 5, find x when y = 42.

Lorico [155]

Answer: 10

<u>Step-by-step explanation:</u>

varies directly means: $\frac{y}{x} = k$

Step 1: solve for k ⇒ $\frac{21}{5} = k$

Step 2: plug in the given value and k to solve for the missing value: $\frac{42}{x} = \frac{21}{5}$

42(5) = 21(x)

$\frac{42(5)}{21} = \frac{21(x)}{21}$

2(5) = x

10 = x

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3 years ago

Graph the system of equation -9x + 3y = 27 8x + 8y =40

kirill [66]

(-1, 6) is your answer

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3 years ago

Can someone help me out

stich3 [128]

Answer:

m= -5/8

Step-by-step explanation:

Slope of a line containing the points,

$\frac{y2 - y1}{x2 - x1} = m$

where, m is the slope

Here,

$m = \frac{7 - 2}{4 - 12} = \frac{ 5}{ - 8} = \frac{ - 5}{8}$

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3 years ago

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insens350 [35]

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3 years ago

An albatross is a large bird that can fly 400 kilometers in 8 hours at a constant speed. Using d for distance in kilometers and

Lostsunrise [7]

Answer:1/50 and 50

Step-by-step explanation:hrs/km=8/400=1/50

km/hrs=400/8=50

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3 years ago