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0.8 can be written as 8/10 and is rational.

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8y ago

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Continue Learning about Algebra

Could the sum of the measures of the interior angle of a polygon be equal to 810 degrees?

No because then it would have 6.5 sides which is impossible


What is scalar multiplication?

Basically, you just multiply each entry in the matrix by a given number 4 1 3 5 -1-810-7-513 = 4 12 20 -4-3240-28-2052 In this case, there are 9 entries so your result is 9 corresponding entries which have been multiplied by 4.


Jackie invested 12000 in a certificate of deposit at 6 percent She also put 3000 in a savings account at 3 percent How much interest will she earn after one year?

$810


A combined total of 24000 is invested in two bonds that pay 7.5 and 9 simple interest The total annual interest is 1935 How much is invested in each bond?

x = the amount of money that was invested at the first bond y = the amount of money that was invested at the second bond x + y = 24,000 so, y = 24,000 - x 0.075x + 0.09y = 1935 0.075x + 0.09(24,000 - x) = 1935 0.075x + 2160 - 0.09x = 1935 -0.015x = - 225 0.015x = 225 x = 225/0.015 x = 15,000, this is the amount of money that was invested in the first bond y = 24,000 - x y = 24,000 - 15,000 y = 9,000, this is the amount of money that was invested in the second bond Check it: 15,000 x 0.075 = 1,125 9,000 x 0.09 = 810 1,125 + 810 = 1,935


A gift box in the shape of a rectangular prism measures 8 inches by 8 inches by 10 inches. What is the least amount of wrapping paper needed to wrap the gift box?

Well, honey, to wrap that rectangular prism, you gotta find the surface area. Add up the area of all six sides: 2(8x8) + 2(8x10) + 2(8x10) = 320 square inches. So, you'll need at least 320 square inches of wrapping paper to cover that bad boy.