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Dvinal [7]
3 years ago
11

I NEED HELP!!! i need this answered fastttt i really need the answer rn ill mark brainly•est if correct (i already know i just w

ant to know if its correct!)​

Mathematics
1 answer:
Mademuasel [1]3 years ago
4 0

Answer:

3

Step-by-step explanation:

not sure tho

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La edad de Ericka es el tripl de la edad de Liliana y hace 9 años la suma de sus edades era 22. ¿Cuantos años tiene actualmente
Gnom [1K]

Answer:

Liliana tiene 10 años.

Step-by-step explanation:

Definamos las variables:

E = edad de Ericka

L = edad de Liliana.

Primero sabemos que la edad de Ericka es el triple de la edad de Liliana, entonces:

E = 3*L

Tambien sabemos que hace 9 años la suma de sus edades era 22

Hace nueve años la edad de Ericka era E - 9

Y hace nueve años la edad de Liliana era L - 9

Entonces tenemos:

(E - 9) + (L - 9) = 22

Así, tenemos un sistema de dos ecuaciones:

E = 3*L

(E - 9) + (L - 9) = 22

Queremos conocer la edad actual de Liliana.

Para ello tenemos que despejar E en una de las ecuaciones.

Podemos ver que en la primer ecaución E ya está aislada, entonces nos saltamos ese paso.

Ahora, reemplazamos E en la otra ecuación:

(E - 9) + (L - 9) = 22

(3*L - 9) + (L - 9) = 22

Ahora podemos resolver esto para L

3*L - 9 + L - 9 = 22

4*L - 18 = 22

4*L = 22 + 18

4*L = 40

L = 40/4 = 10

L = 10

Liliana tiene 10 años.

3 0
3 years ago
This is a masterpiece. <br><br> I’m gonna get banned lol
LenKa [72]

Answer:

I want one :(

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please explain the answer, no links or random words or I will report you.
Ainat [17]

Answer:

y=x-3 is slope-intercept form

3 0
3 years ago
Can someone please help
Korolek [52]

Answer:

Last option, a translation of 1.5 units left, 0.5 unit up, then a reflection across the x-axis

Step-by-step explanation:

Let's pick any random point. So let's just chose point L. Comparing point L to point L', we can already see that the options given are incorrect. For example,  the first option with just translations is incorrect because when we do translate point L 1.5 units left and then 1.5 units down, it does not line up with point L'. For the second and third options, we know that L(-2.5, 1.5) and L'(-4,-2). Therefore, there must be some sort of shift left, right, up, or down, to go from coordinates with decimals to coordinates with whole numbers, leaving the last option, D, as the correct one.

3 0
3 years ago
How do I rewrite In 7=y as an exponential equation? I kind of forgot how to do these
Marina CMI [18]

Answer:

e^y=7

Step-by-step explanation:

ln(7)=y

e^{ln(7)}=e^y

7=e^y

Raising e to both sides cancels out the natural logarithm on the left side and we have our exponential form. This works with other bases (recall that the natural logarithm, ln, has base e)

7 0
3 years ago
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