3 years ago

Write the coordinates of the vertices after a reflection across the line y = 4

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

8 0

A'(-9,4)
B'(-4,4)
C'(0,-4)
D'(-5,-4)

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A trapezoid has an area of 42 square miles. One base is 4 miles long. The height measures 6 miles. What is the length of the oth

loris [4]

The length of other base of trapezoid is 10 miles

Step-by-step explanation:

The formula for area of trapezoid is:

$A=\frac{h}{2}(b_1+b_2)$

We know that

A = 42 square miles

b_1 = 4 miles

h = 6 miles

Putting the values

$42=\frac{6}{2}(4+b_2)\\42=3(4+b_2)\\42=12+3b_2\\Subtracting\ 12\ from\ both\ sides\\42-12=12+3b_2-12\\3b_2=30\\Dividing\ both\ sides\ by\ 3\\\frac{3b_2}{3}=\frac{30}{3}\\b_2=10\ miles$

The length of other base of trapezoid is 10 miles

Keywords: Area of trapezoid

Learn more about area at:

#LearnwithBrainly

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4 years ago

A cell phone plan cost $100 to start then there is a 40 charge each month.

Mnenie [13.5K]

Answer:$1,060

Step-by-step explanation: if it charges $40 every mont after the the first 100 dollar charge that means in 1 year you with have payed 480 becuase 40*12= 480 then adding on another year with make it 40*24=960 also including the first $100 u pay you with have payed $1,060

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3 years ago

Janelle had $12O when she went shopping. After she finished shopping she had$96. what is the percent decrease in her amount of m

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