Which is another way to check the sum of 104+34+228+877?
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Answer 1
Answer:
A simple method of checking the sum of arithmetic problems is by using the "digit sum" method. The digit sum can be obtained by adding the digits of a number together, until you get a single-digit number. In case you get a double-digit number, just add them again until you get a single digit number.
Let's try it with an example.
Given the numbers 143, 876, and 534, their digit sums would be: 144 : 1 + 4 + 3 = 9 (same as 0) 876 : 8 + 7 + 6 = 21; 2 + 1 = 3 534 : 5 + 3 + 4 = 12; 1 + 2 = 3
Getting the digit sum is actually getting the number modulo 9, which in other words, is the remainder of that number divided by 9. Since you now have an understanding of the digit sum, how can it be used to check the sum of the problem above?
By comparing the sum of the digit sums of the addends and the digit sum of the obtained sum, you can determine if the arithmetic process was done correctly. Let us do this below:
What is the distance between points A begin ordered triple (0,0,8) end ordered triple and B begin ordered triple (0,6,0) end ordered triple?Answer is 10 units, but why is this rational?
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Step 1: Obtain the difference vector AB= (0-0, 0-6, 8-0)=(0, -6, 8) it size (module) is the distance between A and B Step 2: Add-Up the squares of its components: 0^2+(-6)^2 + 8^2=100 Step3: Extract the squareroot of the above: sqrt(100)=10 Voilá!
The solution to an equation is 21
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an solution to an equation = 21 would be something like 2p + 7
if you wanna know how to solve this here is how: Simplifying 2p + 7 = 21 Reorder the terms: 7 + 2p = 21 Solving 7 + 2p = 21 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2p = 21 + -7 Combine like terms: 7 + -7 = 0 0 + 2p = 21 + -7 2p = 21 + -7 Combine like terms: 21 + -7 = 14 2p = 14 Divide each side by '2'. p = 7 Simplifying p = 7
Find each product or quotient. Use significant digits. 1,370 m 31.7 sa. 43 m/s b. 43.218 m/s c. 43.22 m/s d. 43.2 m/s
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I think you are asking for the quotient of the numbers because base from the choices the units are meters per second and the given has units of meters and seconds. So, the quotient of the numbers is 43.218 meters per second which is option B.
Niki makes the same payment every two months to pay off his $61,600 loan. The loan has an interest rate of 9.84%, compounded every two months. If Niki pays off his loan after exactly eleven years, how much interest will he have paid in total? Round all dollar values to the nearest cent.
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The question is an annuity question with the present value of the annuity given. The present value of an annuity is given by PV = P(1 - (1 + r/t)^-nt) / (r/t) where PV = $61,600; r = interest rate = 9.84% = 0.0984; t = number of payments in a year = 6; n = number of years = 11 years and P is the periodic payment. 61600 = P(1 - (1 + 0.0984/6)^-(11 x 6)) / (0.0984 / 6) 61600 = P(1 - (1 + 0.0164)^-66) / 0.0164 61600 x 0.0164 = P(1 - (1.0164)^-66) 1010.24 = P(1 - 0.341769) = 0.658231P P = 1010.24 / 0.658231 = 1534.78 Thus, Niki pays $1,534.78 every two months for eleven years. The total payment made by Niki = 11 x 6 x 1,534.78 = $101,295.48 Therefore, interest paid by Niki = $101,295.48 - $61,600 = $39,695.48
Answer:
answer is A on edge
Step-by-step explanation:
What was the percent of decrease in the number of pumpkins sold
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% decrease = change/original price x 100% = (1200 - 900)/1200 x 100% = 300/1200 x 100% = 25%
Therefore, the number of pumpkins sold decreased by 25%.
Rico,Carolina,and Gloria have pizza that they are going to be sharing with other people. Rico gave away 1/3 of his cheese pizza to Carolina and she gave him 3/7 of her pepperoni. Rico then gave Gloria 1/7 of his cheese pizza. How much pizza, pepperoni and cheese does Rico have now?
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Rico now has one cheese, and three pepperoni slices. In total he has 4 slices.