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kozerog [31]
3 years ago
6

A number has two digits. The digit at tens place is four times the digit at units place. If 54 is subtracted from the number, th

e digits are reversed. Find the original number.
Mathematics
1 answer:
iren2701 [21]3 years ago
4 0

"The digit at tens place is four times the digit at units place."

How many possible numbers are there?

1 in the units place: 41

2 in the units place: 82

If you try 3 in the units place, 4 * 3 = 12, you'd get 123, and now it's a three-digit number, so the only possibilities are 41 and 82.

41 or 82

If you subtract 54 from 41, you get a negative number, so 41 cannot be the number.

82 - 54 = 28, which has the digits of 82 in reverse order.

Answer: 82

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The price of two books is =$(7.99× 2)= $ 15.98

Total amount that he paid for iPhone 7 and two books is =$(217.49+15.98)

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Therefore his new balance = $(952.43- 233.47)

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The new iPhone 7 is not as awesome as promised , and Darnell returns it.

He will get the price of iPhone refund.

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8 0
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Consider the tangent line to the curve y = 6 sin(x) at the point (π/6, 3). (a) Find a unit vector that is parallel to the tangen
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Step-by-step explanation:

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