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dmitriy555 [2]
3 years ago
12

Y=4x and x+y=5 6-2 substitution

Mathematics
1 answer:
fiasKO [112]3 years ago
5 0

Answer:

x=1, y=4. (1, 4).

Step-by-step explanation:

y=4x

x+y=5

----------

x+4x=5

5x=5

x=5/5

x=1

y=4(1)=4

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A x 4 = E B ÷ 4 = E C + 4 = E D - 4 = E & A + B + C + D = 100 Challenge what is the value of E ?
pentagon [3]

4A = E , A=E/4-----(1)

B/4=E , B=4E-------(2)

C+4=E, C=E-4------(3)

D-4=E, D=E+4------(4)

Substitute all values in 5th equation,

A+B+C+D=100  =  E/4 + 4E + E-4+ E+4 =100

 E/4 + 6E = 100

25E = 400

E=16 ANS....

7 0
3 years ago
Una nadadora entrenó todos los días durante 21días. El primer día nadó 15 minutos, y cada día nadaba 5 minutos más que el día an
nadya68 [22]

Responder:

1 hora 55 minutos; 22 horas 45 minutos

Explicación paso a paso:

Dado que:

Tiempo el primer día = 15 minutos

Minutos adicionales cada día siguiente = 5 minutos

Número total de días

Usando la fórmula del enésimo término de una progresión aritmética:

Tn = A + (n - 1) d

A = primer trimestre = 15

d = diferencia común = 5

n = enésimo término

Tiempo de nado el último día (n = 21)

T21 = 15 + (21 - 1) 5

T21 = 15 + 20 * 5

T21 = 15 + 100

T21 = 115 minutos

= 1 hora 55 minutos

SEGUNDO.)

Suma de minutos durante las 3 semanas

Suma de n términos:

Sn = n / 2 * (primer término + último término)

Primer término = 15

Último trimestre = a21 = 115 minutos

n = número de términos = 21

Por lo tanto,

Sn = 21/2 * (15 + 115)

Sn = 10,5 * (130)

Sn = 1365 minutos

= 22 horas 45 minutos

3 0
3 years ago
Two cylindrical soup cans have a volume of 40 cubic inches. Can their surface areas be unequal?
Licemer1 [7]
Yes, it is definitely possible that their surface areas be unequal.
5 0
4 years ago
Identify the domain of the function shown in the graph.
STALIN [3.7K]

Answer:

[2, 6].

Step-by-step explanation:

Notice that there is a red line (graph) only for [2, 6].  Thus, the domain of this function is [2, 6].

6 0
3 years ago
What are the solutions for the given equations below?
Lubov Fominskaja [6]

Answer:

2/ x = +-2

3/ n = +-3

Step-by-step explanation:

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