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anygoal [31]
3 years ago
12

Sabena had a sum of money. She spend $10 on a textbook and used half of the remaining money to buy some fruit. She then bought a

meal that cost $5 and was left with $8. How much money did Sabena have at first? explain
Mathematics
1 answer:
adell [148]3 years ago
7 0
$36. 8+5=13, 13×2=26, 26+10=36
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Do this pls 35 points
love history [14]

Answer:

x = 68

Step-by-step explanation:

If you look at the triangle properly, it is a isosceles triangle where two legs are equal to each other.

The answer for x will be:

56 + 56 + x =180

112 + x = 180

x = 68

7 0
3 years ago
Can you show all steps to simplify (3x-4)+(x+3)^2
ella [17]
<span>(3x-4)+(x+3)^2
= 3x - 4 + x^2 + 6x + 9 .........(expand using (a+b)^2 = a^2 + 2ab + b^2)
= x^2 + 9x  + 5 ..........(combine like terms and simplify)

hope that  helps</span>
3 0
2 years ago
A beam of light from a monochromatic laser shines into a piece of glass. The glass has thickness L and index of refraction n=1.5
boyakko [2]

Additional information to complete the question:

How long does it take for a short pulse of light to travel from one end of the glass to the other?

Express your answer in terms of some or all of the variables f and L. Use the numeric value given for n in the introduction.

T = ___________ s

Answer:

 T = \frac{15}{f}

Step-by-step explanation:

Given:

Thickness og glass = L

Index of refraction n=1.5

Frequency = f

Wavelength = \frac{L}{10}

λ(air) = \frac{L}{10}

λ(glass) = λ(air) / n

             = \frac{\frac{L}{10}}{1.5}

             = \frac{L}{10} * \frac{1}{1.5}

             = \frac{L}{15}

V(glass) = fλ(glass)

              = f * \frac{L}{15}

          T = \frac{L}{V_{glass}} = \frac{15}{f}

     

7 0
3 years ago
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MakcuM [25]

Answer:

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Step-by-step explanation:

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5 0
2 years ago
Find the x and y intercepts
UNO [17]

Answer:

2x

Step-by-step explanation:

solve it

5 0
3 years ago
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