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3 years ago

10

Pensé dos números. Si los sumo obtengo 20. Si al doble del primer número le sumo 35 obtengo el segundo. ¿ qué número pensé?

1 answer:

SpyIntel [72]3 years ago

4 0

For this case, the first thing we must do is define variables:
x: first number
y: second number
We now write the system of equations:
x + y = 20
y = 2x + 35
Solving the system we have:
x = -5
y = 25
Answer:
The numbers are:
x = -5
y = 25

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2 years ago

Fifty-five percent of the members of the junior varsity swim team wear glasses. Of the team memebers who do not wear glasses, 30

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Let the total no. of members be x.

So, the members of the junior varsity swim team wear glasses (55%),will be

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2 years ago

The measure of each interior angle of a regular polygon is 157.5 ∘ . How many sides does the polygon have?

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3 years ago

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Then:

$\begin{gathered} \frac{3^{100}}{3^{99}}=3^{100-99} \\ =3^1 \\ =3 \end{gathered}$

Therefore:

$\frac{3^{100}}{3^{99}}=3$

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1 year ago