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3 years ago

14

How can coordinate proof be used to prove two lines are parallel?

1 answer:

torisob [31]3 years ago

8 0

You can use the coordinates to find the slope of each line. If you can show the two slopes are equal, then the lines are parallel.

Side note: If the lines are vertical, and never cross, then they will be parallel despite having an undefined slope. This is one of the exceptions to the rule.

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On a local sports team, 30 % of 50 players are -handed. How many left -handed players are there?

goldfiish [28.3K]

Answer:

35 players are left-handed

Step-by-step explanation:

50% of 50 is 25

40% of 50 is 20

30% of 50 is 15

50 - 15 = 35

7 0

3 years ago

Which pair of words describes this system of equations 3y=9x-6 2y+6x=4

pishuonlain [190]

Answer:

Consistent and dependent

Step-by-step explanation:

Given

$3y = 9x - 6$

$2y + 6x = 4$

Required

The words that describe the equations

Make y the subject in (2)

$2y + 6x = 4$

Collect like terms

$2y = 4 - 6x$

Divide through by 2

$y = 2 - 3x$

Substitute: $y = 2 - 3x$ in (1)

$3y = 9x - 6$

$3(2 - 3x) = 9x - 6$

$6 - 9x = 9x - 6$

Collect like terms

$9x+9x = 6+6$

$18x = 12$

Solve for x

$x = \frac{12}{18}$

Simplify

$x = \frac{2}{3}$

Substitute $x = \frac{2}{3}$ in $y = 2 - 3x$

$y = 2 - 3*\frac{2}{3}$

$y = 2 - 2$

$y =0$

So, we have:

$x = \frac{2}{3}$ and $y =0$

<em>The system is consistent because it has at least 1 solution</em>

<em>The system is dependent because it has more than 1 solution</em>

6 0

3 years ago

Ben wants to buy a video game that cost 50$.If he has to pay a7% sales tax: how much tax would he need to pay?

Bingel [31]

Multiply the cost of the game by the sales tax:

7% tax = 0.07

50 x 0.07 = 3.5

The tax would be $3.50

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3 years ago

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Viefleur [7K]

Answer:

40

Step-by-step explanation:

<h3>6×40⇒240</h3>

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3 years ago

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eimsori [14]

Answer:

he earns $14 per hour so multiply 14 by 40=560

4 0

3 years ago

Read 2 more answers