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topjm [15]
3 years ago
15

"the sum of the digits of a two-digit number is 13. reversing the digits produces a number that is 9 less than the original numb

er. what is the original number?"
Mathematics
1 answer:
Ksenya-84 [330]3 years ago
6 0
Suppose the one's digit is x, the ten's digit is y. the original number is 10y+x, the reversed number is 10x+y

x+y=13
(10x+y)=(10y+x)-9 =>9y-9x=9 =>y-x=1
Add the two equation to solve: 2y=14 =>y=7
x=13-7=6
the original number is 76. 


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Alicia bought 3.8 pounds of cashews for 15.75 about how much was the cost per pound
icang [17]
The answer is $4.14.

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6 0
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Read 2 more answers
Can somebody help me with this question
natta225 [31]
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4 0
3 years ago
H=7+44t-16^2
djyliett [7]

Answer:

t_1\approx2.18

t_2\approx0.57

Step-by-step explanation:

h=7+44t-16t^2

27=7+44t-16t^2

0=-20+44t-16t^2

0=-16t^2+44t-20

t=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

t=\frac{-44\pm\sqrt{44^2-4(-16)(-20)}}{2(-16)}

t=\frac{-44\pm\sqrt{1936-1280}}{-32}

t=\frac{-44\pm\sqrt{656}}{-32}

t=\frac{-44\pm4\sqrt{41}}{-32}

t=\frac{11}{8}\pm\frac{\sqrt{41}}{8}

t_1\approx2.18

t_2\approx0.57

5 0
2 years ago
Find the measure of angle x. Round your answer to the nearest hundredth. (please type the numerical answer only)
Alex

The value of x in the triangle is 28.1 degrees

<h3>How to solve for x?</h3>

The given triangle is a right triangle.

So, the relationship between the sides and angle x is:

sin(x) = opposite/hypotenuse

This gives

sin(x) = 8/17

Evaluate the quotient

sin(x) = 0.4706

Take the arc sin of both sides

x = \sin^{-1}(0.4706)

Evaluate

x = 28.1

Hence, the value of x in the triangle is 28.1 degrees

Read more about right triangles at:

brainly.com/question/2437195

#SPJ1

5 0
2 years ago
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