Answer:
6.8
Step-by-step explanation:
negative 2 times negative 3 is -6.
negative 2 times negative 0.4 is -0.8.
add them together :)
40% of 40
10% of 40 is 4
4 x 4=16
40-16 =24
Answer is 24

★ ∆ ABC is similar to ∆DEF
★ Area of triangle ABC = 64cm²
★ Area of triangle DEF = 121cm²
★ Side EF = 15.4 cm

★ Side BC

Since, ∆ ABC is similar to ∆DEF
[ Whenever two traingles are similar, the ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides. ]

❍ <u>Putting the</u><u> values</u>, [Given by the question]
• Area of triangle ABC = 64cm²
• Area of triangle DEF = 121cm²
• Side EF = 15.4 cm

❍ <u>By solving we get,</u>






<u>Hence, BC = 11.2 cm.</u>

★ Figure in attachment.

Perimeter is the distance around the shape.
Formula for rectangle P = 2l + 2w
The answer is C. go with it.