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vladimir1956 [14]
3 years ago
12

La suma de las edades de una madre y de su hijo son 56 años. Hace 10 años, la edad de la madre era el quíntuple de la edad que t

enía el hijo. ¿Cuál es la edad actual de cada uno?
Mathematics
1 answer:
Snezhnost [94]3 years ago
7 0

Answer:

The mother is 40 years old and the son is 16 years old.

Step-by-step explanation:

With a system of equations mentioned in the statement the answer can be reached, we have to:

Let X be the age of the mother, Y the age of the son.

X + Y = 56 (1)

X-10 = 5 * (Y-10) (2)

Solving

 X -10 = 5 * Y - 50

From where:

X = 5 * Y - 40

Substituting in the first equation:

5 * Y - 40 + Y = 56

6 * Y = 56 + 40

Y = 96/6 = 16

Now, replacing the value of Y:

X = 5 * 16 - 40

X = 80 -40

X = 40

Therefore the mother is 40 years old and the son is 16 years old.

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The altitude a (in feet) of a plane t minutes after liftoff is given by a=3400t+600. How many minutes after liftoff is the plane
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3 years ago
2. Robert has three jobs. He worked at Young's Grocery and earned $5,805. He was a waiter at the A & B Restaurant and earned
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Robert paid $4,603.6 in Social Security.

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8 0
2 years ago
3/4(48 - 16) = 4(4 + 2x)
max2010maxim [7]

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3/4(32)=4(4+2x)

Multiply the numbers

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24=4(4 + 2x)

Rearrange terms

24=4(4 + 2x)

24=4(2x + 4)

24=8x+16

Subtract  1 6  from both sides of the equation

24-16=8x+16-16

8=8x+16-16

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Divide both sides of the equation by the same term

8=8x

<u>8=8x</u>

8   8

Simplify

1=<u>8x</u>

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Cancel terms that are in both the numerator and denominator

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faltersainse [42]

Answer:

g(2a) = 4a² - 2

Step-by-step explanation:

substitute x = 2a into g(x) , that is

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2 years ago
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