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Mathematics, 21.07.2019 09:20 kereshmeh
9. the sides of a rectangle are increased by a scale factor of 4. the perimeter of the smaller rectangle is 20 cm. what is the perimeter of the larger rectangle? (1 point) 320 cm 80 cm 120 cm 60 cm 10. a right triangle has an area of 13 m2. the dimensions of the triangle are increased by a scale factor of 3. what is the area of the new triangle? (1 point) 39 m2 169 m2 117 m2 142 m2 12. the width of a picture is 20 cm. using a color copier, you reduce the width of the picture to 5 cm. what is the scale factor of the dilation? (1 point) 5 1 over 5 4 1 over 4 13. on a given blueprint, 1 inch = 16 feet. if the dimensions of the bedroom on the blueprint are 0.75 inches × 1.5 inches, what are its actual measurements? (1 point) 16 ft × 32 ft 12 ft × 24 ft 16 ft × 24 ft 12 ft × 32 ft 14. using the same scale factor, what are the blueprint dimensions for a room that is 20 feet x 28 feet? (1 point) 1.5 in. × 2.5 in. 1.25 in. × 2.25 in. 1.25 in. × 1.75 in. 1.5 in. × 1.75 in. 15. the scale of a map is 1 in.: 75 mi. how many actual miles does 0.85 inches represent? (1 point) 88.2 miles 63.75 miles 95.6 miles 4,781.3 miles
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