A test has 20 questions. If Peter gets 80% correct, how many questions did Peter miss?

2 answers:

5 0

Answer:

4 questions

Step-by-step explanation:

4 wrong = 80%

3 0

Answer:

Step-by-step explanation:

20 x 0.80

16 - 20

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cricket20 [7]

80%

Ummm bro the explanation is simple he keeps 8/10 and he saves 2/10 sooo

8/10 x 10 = 80/100 spends 80%

2/10 x 10 = 20/100 saves 20%

Easy peasy...

9 0

4 years ago

Zielflug [23.3K]

Using cartesian coordinates concepts such as midpoint and distance between two points, it is found that:

Water ride is at point (3,8).
Roller coaster is at point (27,40).
The Ferris wheel is at the midpoint of the water ride and the roller coaster, thus it's coordinates are the <u>mean of their coordinates.</u>

$x = \frac{3 + 27}{2} = 15$

$y = \frac{8 + 40}{2} = 24$

The location point of the Ferris wheel is (15,24).

The distance between two points, $(x_1,y_1)$ and $(x_2,y_2)$ is given by:

$D = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$

Here, Tiffany and her sister are at (15,24) while their parents are at (3,8). Thus, their distance is:

$D = \sqrt{(15 - 3)^2 + (24 - 8)^2} = 20$

They need to walk 20 units.

Hotdog stand is directly east of the water ride, thus, it has the <u>same y-coordinate, while the x-coordinate is increased</u>.
The distance is of 20 units, thus:

$(3 + 20, 8) = (23,8)$