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3 years ago

Hasil dari 4x + 4xy -2x +7xy=

Mathematics

1 answer:

OLEGan [10]3 years ago

5 0

13x is the answer because 4x + 4xy = 8xy then solve the -2x+7xy
8xy-2x+7xy cancel the common xy then 6+7=13x

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PLEASE HELP ASAP! D:

artcher [175]

The solution to a system of equations is the point where the 2 lines of a graph cross each other.

On the pictured graph, the lines cross each other at x = -6 and Y = -2.

The answer would be (-6,-2)

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3 years ago

9x - 5 = 2x + 8<br><br><br> PLSSSS Help. Algebra 1

drek231 [11]

Step-by-step explanation:

9x - 2x = 8 + 5

7x = 13

x =13÷7

x = 1.8571

approximately = 1.86

I think this is it

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3 years ago

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Diego is playing basketball. While running at 7 km/h toward a basketball hoop, he throws the ball at the net. The ball travels a

zlopas [31]

Answer:

27 km/h (｡◝‿◜｡)

Step-by-step explanation:

Let's take the direction in which Diego is travelling as positive direction. Therefore:

- Diego is travelling at a velocity of +7 km/h, towards the net

- The ball travels at +20 km/h towards the net, with respect to Diego's reference system

Therefore, the velocity of the ball with respect to the net reference system is equal to the sum of the two velocities:

6 0

3 years ago

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The ability of lizards to recognize their predators via tongue flicks can often mean life or death for lizards. Seventeen juveni

Sloan [31]

Answer:

Confidence level is (380.7133, 533.2867)

Step-by-step explanation:

Responses in number of tongue flicks per 20 minutes of lizards, are: 727,217, 268, 438, 625, 319, 200, 591, 574, 727, 693, 336, 302, 761, 268, 353, 370

n = 17

Mean (μ) is:

$\mu=\frac{{\Sigma}x}{n} = \frac{727+217+ 268+ 438+ 625+ 319+ 200+ 591+ 574+ 727+ 693+ 336+ 302+ 761+ 268+ 353+ 370}{17} = 439.3529$

Standard deviation (σ) is:

$\sigma=\sqrt{\frac{\Sigma(x-\mu^2)}{n} } =\sqrt{\frac{(727-457)^2+(217-457)^2+...+(370-457)^2}{17} } =191.2$

The confidence interval (c) = 90% = 0.9

$\alpha=1-0.9=0.1\\\frac{\alpha }{2} = 0.05\\Z_{\frac{\alpha }{2} }=1.64$

Margin of error (e) = $=Z_{\frac{\alpha}{2} }*\frac{\sigma}{\sqrt{n} }=1.64*\frac{191.2}{\sqrt{17} }=76.2867$

Confidence level = μ ± e = 457 ± 76.2867 = (380.7133, 533.2867)

8 0

4 years ago

Daniel is 5 feet tall. Every year he grows 5% taller. What will be his height next year?

forsale [732]

I'm pretty sure he would be 5 ft 3 in. tall.

8 0

3 years ago

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Hasil dari 4x + 4xy -2x +7xy=​

Hasil dari 4x + 4xy -2x +7xy=