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3 years ago

10

The four corners of a rectangle at the points (-3,-4), (5,-10), (-3,-10), and (5,-4) on a coordinate plane. How many square unit

s is the area of the rectangle?

1 answer:

Grace [21]3 years ago

8 0

Check the picture below, you can pretty much count the units off the grid for the length and width.

recall area = length * width.

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the scale of a map is 1cm to 12km what is the distance on land if the length from town A to town B on the map is 15cm

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180 km

Step-by-step explanation:

1 cm=12 km

15 cm=12×15=180 km

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3 years ago

Read 2 more answers

Points B and B' have symmetry with respect to P. Find the coordinates of P when B is (2, 8) and B' is (2, 2). A. (2, 5) B. (0, 5

Alecsey [184]

Answer:

A. (2, 5)

Step-by-step explanation:

If B and B' have symmetry, then P is a midpoint between those points. We can determinate the location of point P by using the midpoint equation, whose vectorial form is:

$P(x,y) = \frac{1}{2}\cdot B(x,y)+\frac{1}{2}\cdot B'(x,y)$ (Eq. 1)

If we know that $B(x,y) = (2,8)$ and $B'(x,y) = (2,2)$ , then the location of P is:

$P(x,y) = \frac{1}{2}\cdot (2,8)+\frac{1}{2}\cdot (2,2)$

$P(x,y) = (1, 4)+(1,1)$

$P(x,y) = (2, 5)$

Which corresponds to option A.

7 0

3 years ago

Can someone help me with these questions please?

kotykmax [81]

Step-by-step explanation:

You can solve systems of equations using either substitution or elimination. For these problems, I recommend elimination. I'll do the first one as an example.

-3x + 16y = 9

-4x + 8y = 12

Multiply the second equation by -2.

8x − 16y = -24

Add to the first equation (notice the y's cancel out).

(-3x + 16y) + (8x − 16y) = 9 − 24

5x = -15

Solve for x.

x = -3

Now you can plug this into either equation to find y.

-3(-3) + 16y = 9

9 + 16y = 9

y = 0

The solution is (-3, 0).

3 0

3 years ago