Help with these two will mark you as brainliest

Mathematics

1 answer:

iragen [17]3 years ago

7 0

16) Yes, rotating a figure does not change it's shape or size.

17) When you reflect a point (or points that make up a triangle) over the y-axis, multiply the x-coordinate of the ordered pair by -1. This gets you (-1,1) (-1,5) (-4,1)

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A composite figure has three congruent triangles removed from it.

Advocard [28]

16•16=256

A quarter is missing so 256/4=64

64•3=192 is the total square area.

When you find the area of a triangle you usually do (b•h)/2

Since this right here is equal triangles for both ways you can simply divide 192/2=96ft^2

3 0

3 years ago

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Beth is moving into a new house and purchased cardboard boxes for packing her things. Each cardboard box has a square base and a

Shtirlitz [24]

Answer: Choice D)
S(x) = 6x^2 - 20x

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Explanation:

x = side length of base
x*x = x^2 = area of base

The top also has an area of x^2 since the base and top are both congruent squares. The total base area is x^2+x^2 = 2x^2

The height h is 5 inches shorter than the base, so
h = (base length) - 5
h = x-5

Each lateral side is of area h*x = (x-5)*x = x^2-5x

There are 4 lateral sides
Total lateral area = 4*(area of one lateral side)
Total lateral area = 4*(x^2-5x)
Total lateral area = 4*x^2-4*5x
Total lateral area = 4*x^2-20x

Add the total lateral area (4x^2-20x) to the total base area (2x^2)

Doing so gets us
S(x) = Total Surface Area
S(x) = (Area of bases) + (area of lateral sides)
S(x) = (2x^2) + (4x^2-20x)
S(x) = (2x^2+4x^2) - 20x
S(x) = 6x^2 - 20x
which is why the answer is choice D

4 0

3 years ago

What is the solution to |2x + 3| = 15? A. x = 6 B. x = 6 or x = -6 C. x = 6 or x = -9 D. No solutions exist.

Dima020 [189]

Answer:
C. X=6 or X= -9

First Explanation:

2x + 3 - 3 = 15 - 3 (subtract 3 from 3 and 15)

You should get 2x = 12

Then divide 2x by 2

Divide 12 by 2 which you should get
X = 6

Second Explanation:

2x + 3 - 3 = 15 - 3 (subtract 3 from 3 and 15)

You should get 2x = -18

Then divide 2x by 2

Divide -18 by 2 and you should get
X = -9

7 0

3 years ago

In a class of 80 students in Debre Berhan University, 45 are good in mathematics, 15 are good in both mathematics and English, 1

Burka [1]

Step-by-step explanation:

No of Student in Debre Berhan University - 80 students

<h2>No of student good in mathematics - 45 student's </h2>

No of students good in mathematics and English -15

<h2>No of students good in mathematics and psychology -13</h2>

<h2>No of students good in English and psychology -16</h2>

<h3>No of students good in psychology -20</h3>

no of student good in mathematics -45+15+13

therefore no of student good in math is 75 .

pls mark me branilest 

7 0

3 years ago

To order tickets for a show, there is a $5.00 service fee, plus the cost of the tickets. If the cost of the whole order is $105.

romanna [79]

The cost of each tickets is $12.5

4 0

4 years ago

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