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3 years ago

How do I calculate the perimeter and the area

Mathematics

1 answer:

patriot [66]3 years ago

3 0

It is a semicircle so you'd use this formula for the area:

πr² / 2

Then substitute 2 into r and solve (2 because it's the radius, 4 is the diameter)

You would use this formula for the perimeter:

(πd / 2) + d
or
πr + 2r

Then substitute 4 into d / 2 into r and solve.

Hope I helped :)

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What is 2/5 divided by -1/2 minus 3/2

shutvik [7]

Answer:

$- \frac{23}{10}$

Step-by-step explanation:

$\frac{2}{5} \div \frac{ - 1}{2} - \frac{3}{2}$

➡️ $- \frac{2}{5} \times 2 - \frac{3}{2}$

➡️ $- \frac{4}{5} - \frac{3}{2}$

➡️ $- \frac{23}{10}$

5 0

3 years ago

Read 2 more answers

2(3x – 1) = 6x – 2 number of solutions

Alexxandr [17]

Answer: All real numbers are solutions.

Step-by-step explanation:

Let's solve your equation step-by-step.

2(3x−1)=6x−2

Step 1: Simplify both sides of the equation.

2(3x−1)=6x−2

(2)(3x)+(2)(−1)=6x+−2(Distribute)

6x+−2=6x+−2

6x−2=6x−2

Step 2: Subtract 6x from both sides.

6x−2−6x=6x−2−6x

−2=−2

Step 3: Add 2 to both sides.

−2+2=−2+2

0=0

4 0

2 years ago

Make a frequency distribution and find the relative frequencies for the following number set. Round the relative frequency to th

Mandarinka [93]

Number......frequency.....relative frequency
10 2 2/24 = 8.3%
20 2 2/24 = 8.3%
30 4 4/24 = 16.7%
40 2 2/24 = 8.3%
50 3 3/24 = 12.5%
60 5 5/24 = 20.8%
70 3 3/24 = 12.5%
80 1 1/24 = 4.2%
90 2 2/24 = 8.3%
total : 24

7 0

3 years ago

The average human reaction time from eye to finger is 0.16 second. How is this expressed as a fraction?

xxTIMURxx [149]

Answer:

4/25 seconds

Step-by-step explanation:

the second (0.16) is in two decimal places, so divide 16 by 100

$\frac{16}{100}$

to express in the simplest form, divide the numerator and the denominator by 4

= $\frac{4}{25}$

6 0

3 years ago

Jenna is twice as far from the finish line as she is from the start of a 10 km race. how far has she ran?

kipiarov [429]

If she is still twice as far from the finish as she is from the start,
then she has run one-third of the course so far, and has two-thirds
left to go.

1/3 of 10 km = 10/3 km = 3 and 1/3 km, or 3,333 and 1/3 meters .

8 0

3 years ago