3 years ago

2

Mathematics

1 answer:

LiRa [457]3 years ago

3 0

The answer is B I took the test

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How do you convert something like 3000mm to km if 1 km equals 1000m? btw - im in elementary - but there's no option for that is

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Answer:

Step-by-step explanation: divid e 3000 by 1000

( you can ignor e zeros in this case so 3 divide by 1

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Consider that the system has infinitely many solutions. Which choice is the coefficient of y in the second equation? 5x + 10y =

erastovalidia [21]

ANSWER

The coefficient of y is
$2$

EXPLANATION

The first equation is
$5x + 10y = 15$
We can rewrite this equation in the slope intercept form to get,

$10y = - 5x + 15$

We divide through by 10 to get,

$y = - \frac{1}{2} x + \frac{3}{2}$

The slope of this line is
$- \frac{1}{2}$

and the y intercept is
$\frac{3}{2}$

Let
$a$
be the coefficient of y in the second equation.

Then, we have

$x + ay = 3$

We rewrite this equation too in slope intercept form to get,

$ay = - x + 3$

Dividing through by
$a$

gives,

$y = - \frac{1}{a} x + \frac{3}{a}$

For the two equations to have infinitely many solution, then they must have the same slope and y intercept.

This means, that,

$- \frac{1}{a} = - \frac{1}{2}$

This implies that

$a = 2$

Therefore the coefficient of y must be 2.

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3 years ago

What is -2 to the 4th power?

kupik [55]

It should equal 16, any number to the even power is always positive

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3 years ago

One side of a rectangle is 9 inches longer than another side. If

Andre45 [30]

Answer:

6 and 15

Step-by-step explanation:

x^2 + 9x = x^2 + 7x +12

2x = 12

x = 6

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