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2 years ago

Solve these equations:y= -2x-4y= 3x+1

Mathematics

2 answers:

ELEN [110]2 years ago

5 0

Answer:

(-1, -2)

x = -1 y = -2

Step-by-step explanation:

y= -2x-4

y= 3x+1

Substitution:

3x + 1 = -2x - 4

5x + 1 = -4

5x = -5

x = -5 ÷ 5

x = -1

y= 3x+1

y= 3(-1)+1

y = -3 + 1

y = -2

Liono4ka [1.6K]2 years ago

3 0

For the first one x=-2
For the second one x= -1/3

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Answer:

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3 years ago

Read 2 more answers

Find the range for these numbers.<br><br><br><br> 12, 9, 24, 24, 37, 18, 9, 6, 24

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2 years ago

The fuel cost per hour for running a ship is approximately one half the cube of the speed (measured in knots) plus additional fi

andrezito [222]

Answer:

6 knots

Step-by-step explanation:

Let the speed be v knots

then time taken to cover 500 M = 500 / v hrs

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let F be the fuel consumption for trip

= [500/v][216 + 0.5v^3]

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3 years ago

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. The highest speed measured was 72.6 Mbp

Lapatulllka [165]

Answer:

a. 54.05 Mpbs.

b. 2.745... standard deviations.

c. The z-score is 2.745....

d. The carrier's highest data speed is significantly high.

Step-by-step explanation:

a. The difference between the highest measured data speed and the mean is 72.6 - 18.55 = 54.05 Mbps.

b. The amount of standard deviations of 54.05 Mbps is equal to this value divided by the standard deviations, so we yield $\frac{54.05}{19.69} = 2.745...$ standard deviations.

c. The z-score is equal to the difference between the mean and a data point in standard deviations, so the z-score is 2.745....

d. 2.745... is not between -2 and 2, so the carrier's highest data speed is not insignificant - so it's significantly high.

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3 years ago

Vector v has a direction of (-4,27) find the direction angle for v

mixas84 [53]

$\bf \begin{array}{lclll}
\ \textless \ &-4&,&27\ \textgreater \ \\
&\uparrow &&\uparrow \\
&a&&b
\end{array}\qquad tan(\theta)=\cfrac{b}{a}\implies \measuredangle \theta=tan^{-1}\left( \frac{b}{a} \right)
\\\\\\
\measuredangle \theta=tan^{-1}\left( \frac{27}{-4} \right)$

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3 years ago

Solve these equations:y= -2x-4y= 3x+1​

Solve these equations:y= -2x-4y= 3x+1