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Vedmedyk [2.9K]
3 years ago
11

Marcos ahorro $3270 en monedas de $10,$5 y $2.Si el numero de monedas de $10 excede en 20 a las de $5 y en 15 a las de $2.

Mathematics
1 answer:
Vlad [161]3 years ago
3 0

Answer:

The number of $5 coins is 180

Step-by-step explanation:

Let

x ---> the number of $10 coins

y ---> the number of $5 coins

z ---> the number of $2 coins

we know that

10x+5y+2z=3,270 -----> equation A

x=y+20 ----> y=x-20 ----> equation B

x=z+15 ----> z=x-15 ----> equation C

Solve the system by substitution

Substitute equation B and equation C in equation A

10x+5(x-20)+2(x-15)=3,270

solve for x

10x+5x-100+2x-30=3,270

17x-130=3,270

17x=3,270+130

17x=3,400

x=200

Find the value of y

y=x-20

y=200-20=180

therefore

The number of $5 coins is 180

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Miguel compró 253 Kilos de pescado para venderlo en su negocio, si decide vender cada kilo de pescado en Bs 1.900.000. Entonces,
Sveta_85 [38]

Answer:

Miguel recaudó Bs 480.700.000 por la venta del pescado.

Step-by-step explanation:

Con la información proporcionada puedes calcular el dinero que recaudó en total por la venta del pescado multiplicando el precio de venta de cada kilo de pescado por el número de kilos que Miguel compró:

Número de kilos comprados=253

Precio de venta por kilo=1.900.000

Total vendido=253*1.900.000

Total vendido=480.700.000

De acuerdo a esto, la respuesta es que Miguel recaudó Bs 480.700.000 por la venta del pescado.

7 0
2 years ago
In the diagram, PQ¯¯¯¯¯¯¯¯ is tangent to the circle at point Q, and secant PS¯¯¯¯¯¯¯ intersects the circle at points R and S. Th
dimaraw [331]

The tangent secant theorem says

PR × PS = PQ²

4 × (4+5) = PQ²

36 = PQ²

PQ=6

Answer: 6

3 0
2 years ago
If f(x) = 1 – X, which value is equivalent to f0]?
Illusion [34]

Answer:

1

Step-by-step explanation:

0=1-x

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8 0
3 years ago
Read 2 more answers
Find the 12th term of the arithmetic sequence given a3=116 and a7=180<br>​
SOVA2 [1]

Answer:

Step-by-step explanation:

nth term = a +(n-1)d

a3 = 116 ;   a + 2d = 116 ---------(i)

a7 = 180;   a + 6d = 180 -------(ii)

multiply (ii) by -1. so a will be eliminated

           a + 2d = 116 ---------(i)

(ii)*-1    <u>-a - 6d = -180</u> -------(ii)   { Now add the two equations}

              - 4d = -64

                   d = -64/-4

                  d = 16

Plug in the value of d in equation (i),

a + 2*16 = 116

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        a = 84

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5 0
3 years ago
In a completely randomized design involving three treatments, the following information is provided:Treatment 1Treatment 2Treatm
Aliun [14]

Answer:

7.25

Step-by-step explanation:

Given :

___________ Sample size __ sample mean

Treatment 1 ____ 5 _______ 4

Treatment 2 ____ 10 ______ 8

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Overall mean = (20 + 80 + 45) / 20

= 145 / 20

= 7.25

6 0
2 years ago
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