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3 years ago

A rectangle with dimensions of 3 units by 5 units is enlarged by a scale factor of 1.4 By what percent does its area increase?

Mathematics

2 answers:

Delicious77 [7]3 years ago

8 0

Answer:

128.(6)%

i think this is the ans

vodomira [7]3 years ago

3 0

$A_1=3*5=15\\
3.5*1.4=4.9\\
5*1.4=7\\
A_2=4.9*7=34.3\\
\frac{34.3}{15}*100\%=228.(6)\%\\
228.(6)\%-100\%=128.(6)\%$

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Answer:

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4 years ago

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Examine the diagram and information to answer the question.

Morgarella [4.7K]

Answer:

23.4 units

Step-by-step explanation:

Given the point of the vertices of triangle ABC as A(−5,1), B(2,1), and C(6,4).

The distance (d) between two points X (x₁ , y₁) and Y(x₂, y₂) is given as:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$ . We can use this to calculate the length of the sides of the triangle. Therefore:

$AB=\sqrt{(2-(-5))^2+(1-1)^2}=\sqrt{7^2}=7\\ AC=\sqrt{(6-(-5))^2+(4-1)^2}=\sqrt{11^2+3^2}=11.4\\\\BC=\sqrt{(6-(2))^2+(4-1)^2}=\sqrt{4^2+3^2}=5\\$

The perimeter of the triangle ABC = AB + AC + BC = 7 + 11.4 + 5 = 23.4 units

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