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marysya [2.9K]
3 years ago
14

Given the diagram below, Gitta writes that 1 + 2 + 3 = 180. Which of the following reasons allows her to write this statement

Mathematics
2 answers:
notka56 [123]3 years ago
7 0
A) Triangle sum theory. good luck!!
DaniilM [7]3 years ago
6 0
A. Triangle sum theorem
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The value of a rare baseball card A appreciated by 20 percent over a five year period; over the next five years, the value plumm
lbvjy [14]
<h2>Answer:</h2>

<em><u>Percent value of A with respect to Percent value of B is,</u></em>

30\%

<h2>Step-by-step explanation:</h2>

In the question,

Let us say the value of the Baseball card A and B initially is = 100x

So, for Baseball card A in first 5 years percent increase = 20%

So,

Value after 5 years = 100x + 20% of 100x = 120x

<u>After 5 more years,</u>

Percent decrease = 50%

So,

<u>Value at the end of 10 years = 120x - 50% of 120x = 60x</u>

Now,

For Baseball card B, Percent increase in 10 years = 100%

So,

<u>Value of card B = 100x + 100% of 100x = 200x</u>

So,

<em><u>Percent value of A with respect to Percent value of B is,</u></em>

\frac{60x}{200x}\times 100=30\%

7 0
2 years ago
Evaluate the expression when y = 3 <br> B.) 12y
Archy [21]
12y = 12*3 = 36  ← answer
3 0
3 years ago
Solve the system of equations using substitution. Show your work<br> y=2x + 3<br> y=3x + 1
FrozenT [24]

Answer:

x=2 and y=7

Step-by-step explanation:

Step: Solvey=2x+3for y:

y=2x+3

Step: Substitute2x+3foryiny=3x+1:

y=3x+1

2x+3=3x+1

2x+3+−3x=3x+1+−3x(Add -3x to both sides)

−x+3=1

−x+3+−3=1+−3(Add -3 to both sides)

−x=−2

−x

−1

=

−2

−1

(Divide both sides by -1)

x=2

Step: Substitute2forxiny=2x+3:

y=2x+3

y=(2)(2)+3

y=7(Simplify both sides of the equation)

3 0
3 years ago
Help help help!! Does anyone know number 1 and 2?
iren [92.7K]
1. 7 + 15 + 12 + 5 + 5 + 10 = 54
54 x 2.5 = $135
The correct answer is $135

2. A^2 + 9^2 = 22^2
A^2 + 81 = 484
A^2 = 403
Square root of a and 403
A= 20.7
20.7 + 22 + 9 = 51.7
The correct answer is (3)
3 0
2 years ago
7. If the perimeter of a square is 14g +28 inches, what is the length, in inches, of each side of
AleksandrR [38]

Answer:

3.5x+7

Step-by-step explanation:

divide your coeeficients by 4

5 0
3 years ago
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