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stira [4]
3 years ago
5

when you reverse the digits in a certain two digit number you increase its value by 9 find the sum of its digits is 17

Mathematics
1 answer:
melamori03 [73]3 years ago
3 0
The answer is 80.
80 flipped is 08, which is equal to 8, then 8+9=17
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Please show work (also the best will get brainiest)
MakcuM [25]

Answer:i did this just line up the dots and to tell if its porportional its straight through the orgin.

Step-by-step explanation:

6 0
3 years ago
Preform the indicated operation and express the answer in simplest radical form
tigry1 [53]

hello

the question here is

3\sqrt[]{7}(14-4\sqrt[]{56})

step 1

multiply through the bracket by the coeffiecient

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5 0
1 year ago
The sum of the digits of a two-digit number is 8. The difference between the number and the reversed number is 10 more than the
Vesna [10]

Answer:

The number is 62

Step-by-step explanation:

Let the digits of the number be T and U;

A 2 digit number is represented as: 10T + U

So,

T + U = 8

10T + U - (10U + T) = 10 + 10U + T

Required

Find the digit

Make U the subject in the first equation

U = 8 - T

Substitute 8 - T for U in the second

10T + U - (10U + T) = 10 + 10U + T

10T + 8 - T - (10*(8-T) + T) = 10 + 10(8 - T) + T

10T + 8 - T - (80-10T + T) = 10 + 80 - 10T+ T

10T + 8 - T -80+10T - T = 10 + 80 - 10T+ T

Collect Like Terms

10T + 10T - T- T + 8  -80 = 10 + 80 - 10T+ T

18T -72 = 90 - 9T

9T + 18T  = 90 + 72

27T  = 162

T = 162/27

T = 6

Recall that:

U = 8 - T

U = 8 - 6

U = 2

<em>Hence, the number is 62</em>

5 0
3 years ago
Solve the triangle (picture provided)
NISA [10]

Answer:

m∠A = 9.1°

m∠B = 10.9°

c = 54.2

The answer is (d)

Step-by-step explanation:

∵ a = 25

∵ b = 30

∵ m∠C = 160°

∴ c² = a² + b² - 2 × ab × cos(C)

∴ c² = 25² + 30² - 2(25)(30) × cos(160) = 2934.5389

∴ c = 54.2

∵ a/sin(A) = b/sin(B) = c/sin(C)

∵ 25/sin(A) = 54.2/sin(160)

∴ sin(A) = (25 × sin(160)) ÷ 54.2 = 0.1577584

∴ m∠A = 9.1°

∵ 30/sin(B) = 54.2/sin(160)

∴ sin(B) = (30 × sin(160)) ÷ 54.2 = 0.18931

∴ m∠B = 10.9°

6 0
3 years ago
Which of the following is closest to 1/2: 9/20, 99/ 200, 26/50, 51/100, 502/ 1000
STatiana [176]
502/1000 is closest. Easiest way to determine this is to use a calculator, convert all to decimals, and compare.
3 0
3 years ago
Read 2 more answers
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