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MAVERICK [17]
2 years ago
15

Kayla got 18 out of 20 questions correct on a science test what percentage of the questions did kayla get correct

Mathematics
2 answers:
Ksju [112]2 years ago
7 0

18/20=0.9

Move decimal two spaces to the right and include percent sign

90%

GREYUIT [131]2 years ago
3 0
Divide 18 by 20 and then multiply by 100
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Write a number that has a zero in the tens place. Draw a quick picture for your number
natali 33 [55]
400 hope that helped
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3 years ago
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A family on vacation records the time in hours) and the distance (in miles) that they travel. The data are shown in the scatter
nata0808 [166]

Answer:

In the first 3.5 hours, the family travelled 175 miles.

Step-by-step explanation:

We have the table:

time (hours)              distance ( miles)

      0                                   0

      1                                   50

       2                                 100

      3                                  150

      4                                 200

      5                                 250

      6                                 300

      7                                 350

      8                                 400

      9                                 450

This seems like a linear relationship, let's write the general line:

y = a*x + b

That represents this situation, y is the distance in miles and x is the time in hours.

In the line equation, a represents the slope and b the y-intercept.

And if the line passes through the points (x₁, y₁) and (x₂, y₂), then the slope of the line is:

a = (y₂ - y₁)/(x₂ - x₁)

In this case we have a lot of points for the line, we can use any pair we want (we actually should use a few different pairs to see that the slope is always the same)

So if we use the first two (0, 0) and (1, 50)

the slope is:

a = (50 - 0)/(1 - 0) = 50

Now, if we use the third and fifth points (4, 200) and (5, 250) now the slope is:

a = (250 - 200)/(5 - 4) = 50/1 = 50

So we can conclude that the slope of the equation is a = 50

Then the equation is something like:

y = 50*x + b

To find the value of b, we can use any of the points of the line, for example (0, 0)

This means that when x = 0, y also must be 0, then:

0 = 50*0 + b

0 = b

Then the equation is:

y = 50*x

Now, to answer how many miles the family travelled in the first 3.5 hours, we just need to replace x by 3.5 in the equation:

y = 50*3.5 = 175

In the first 3.5 hours, the family travelled 175 miles.

6 0
3 years ago
A biker travels 5 feet in 0.5 seconds. At this exact speed, how far will the biker travel in a minute?
Pavel [41]
A minute has 60 seconds, therefore we will deal with seconds now And since we have it that the biker travels 5 feet every 0.5 seconds, lets multiply that by 2 to get the traveled distance per second to make it easier 5*2=10 Finally, multiply 10 feet by 60 seconds(1 minute) = 600 feet
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3 years ago
Find the value of x (helppppppppppppoppppppp)
Anna35 [415]
X=121
.......... ... . ......
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3 years ago
Nico owns 11 instructional piano books. Two are beginner books, six are intermediate books, and three are advanced books. If two
Solnce55 [7]
2 beginner, 6 intermediate, 3 advanced...total of 11

P(advanced) = 3/11
replaced
P(beginner) = 2/11

P(both) = 3/11 * 2/11 = 6/121 <=
8 0
3 years ago
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