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DochEvi [55]
4 years ago
6

The sum of the digits of a 2-digit number is 11. If the digits are reversed, the number formed is 45 more than the original numb

er. Find the original number
Mathematics
1 answer:
jeka57 [31]4 years ago
6 0
<h2>the original number is 38</h2>

Step-by-step explanation:

Let the two-digit number be 10t+u where t is the tens digit and u the units digit.

-------------------

EQUATION:

t+u = 11

10u+t = 10t+u + 45

-------------

Rearrange the equations:

t+u = 11

9t-9u = -45

-------------

Simplify:

 

t+u = 11

t-u = -5

---------

Add the equations to solve for "t":

2t = 6

t = 3

--------

Substitute to solve for "u":

3+u = 11

u = 8

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Sin (7 pi/6) = ____?? Help
UkoKoshka [18]

Answer:

-0.5 or -1/2 or A

Step-by-step explanation:

180 degrees is Pi radians.  To find out what the measure is in the paranthesees, divide 180 by 6 and get 30.  Now multiply it by 7 to get 210.  The question is asking for the sin(210).  The sin of 210 is -0.5

7 0
3 years ago
Help please thank you and also show the work please
ziro4ka [17]

Answer:

y= -1.4x-6.6

Step-by-step explanation:

(1,-8)

7x+5y=-7

Make the equation into standard form

Subtract 7x from both sides

5y=-7x-7

Divide all by 5

y=-1.4x-1.4

Since they are parrallel, we know the slope is -1.4x

y=-1.4x+b

(1,-8) is one of the points it goes through

Replace the x and y in the equation for the x and y in the incomplete equation

-8=-1.4+b

Add 1.4 to both sides

-6.6=b

Thus the equation is

y=-1.4x-6.6

3 0
3 years ago
WILL MARK BRAINLIEST ON THE FIRST PERSON !! Giving EXTRA POINTS!! Need the answer right now!!
V125BC [204]

Answer:

I think it's 34.12 inches

Step-by-step explanation:

Use the Phythagorean Theorem, because bisecting a rectangle using the diagonal will produce 2 triangles. The diagonal represents the hypotenuse of the triangle so to solve for it you'd use the formula c² = a²+b²

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DENIUS [597]

Answer:

3/4

Step-by-step explanation:

I got it right so u should tooo x

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3 years ago
Read 2 more answers
Find the length of side x in simplest radical form with a rational denominator.
schepotkina [342]

Answer:

x = 2√3

Step-by-step explanation:

The sides of a 30-60-90 triangle are always in the ratio 1:√3:2.

The length of the side opposite the 90° angle is 4, so the length of the side opposite the 30° angle is 2 and the length of the side opposite the 60° angle is 2√3.

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3 years ago
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