Find the perimeter and area

Mathematics

1 answer:

Wittaler [7]3 years ago

3 0

Answer:

perimeter: 50

area: 78

Step-by-step explanation:

i tried my best to understand

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When i was 18 years old, my sister was half my age. Now I am 82 years. How old is my sister now?

iVinArrow [24]

Answer:

$41 \: \: \: years \: \: \: old$

Step-by-step explanation:

$me \: \: \: \: \: \: \: \: \: \: \: sis \\ 18 \: \: \: \: \: \: \: \: \: \: \: \: 9 \\ 82 \: \: \: \: \: \: \: \: \: \: \: x \\ \\ use \: \: cross \: \\ multipaction \\ \\ 18x = 82 \times 9 \\ 18x = 738 \\ \frac{18x}{18} = \frac{738}{18} \\ x = 41$

4 0

3 years ago

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Figure ABCD is a kite. The area of ABCD is 48 square units. The length of line segment BD is 8 units. What is the length of AC?

Fed [463]

A = d1 x d2 / 2

d1 = BD = 8 units

48 = 8 x AC / 2

48 x 2 = 8 AC

96 = 8 AC

AC = 96 : 8 = 12

Answer: D ) 12 units

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3 years ago

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Suppose your manager indicates that for a normally distributed data set you are analyzing, your company wants data points betwee

julia-pushkina [17]

Answer:

89.04% of the data points will fall in the given range of z = − 1.6 and z = 1.6

Step-by-step explanation:

We are given a normally distributed data.

We have to find the percentage of data that lies within the range z = − 1.6 and z= 1.6

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

$P(-1.6 \leq z \leq 1.6)\\= P(z \leq 1.6) - P(z \leq -1.6)\\\text{Calculating the value from standard normal table}\\= 0.9452 - 0.0548 = 0.8904= 89.04\%$