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padilas [110]
3 years ago
8

Number

Mathematics
1 answer:
DerKrebs [107]3 years ago
8 0

Answer:a=1/5

B=2/15

Step-by-step explanation:

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Only 4 b and c please
Artyom0805 [142]

Answer:

a) 2L + 2W = 42

b) L = 2W + 3

c) The system is :

2L + 2W = 42

L - 2W = 3

( add the two equations )

3L + (2w - 2w) = 45

3L = 45

L = 45/3

L = 15 ( Length )

L - 2W = 3

15 - 2W = 3

2W = 15 - 3

W = 12/2

W = 6

4 0
2 years ago
Determina la masa molar y el volumen que ocupa la siguiente sustancia CO2, si su masa es de 28 gr. *
balandron [24]

Answer:

Para el CO₂ sabemos que:

densidad = 0,001976 g/cm³

Sabemos que:

densidad = masa/volumen

Entonces, si tenemos una masa de 28 g, podemos escribir:

volumen = masa/densidad

volumen = (28g)/(0,001976 g/cm³) = 14,170 cm^3

Para obtener la masa molar (es decir, la masa de un mol de esta sustancia) simplemente sumamos la masa de un mol de cada componente.

Carbono: tiene una masa molar de 12 g/mol

Oxígeno: tiene una masa molar de 16 g/mol (y tenemos dos oxígenos)

entonces la masa molar va a ser:

masa molar = 12g/mol + 2*16g/mol = 44 g/mol

Es decir, un mol de CO₂, pesa 44 gramos.

7 0
3 years ago
If 4/9 of the 63 fishes in the tank were guppies. How many of the fish were not guppies
ArbitrLikvidat [17]
35 were not guppies.

Explanation:
63/9=7
7*4=28
63-28=35
8 0
2 years ago
Triangle DEF has vertex coordinates D(0, -3), E(-1,0), and F(-2,-1). It is
mrs_skeptik [129]
D (0, -3)
E (1, 0)
F (2, -1)
3 0
2 years ago
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The motives for developing calculus in the 1700s were: A. problems in physics. B. problems in biology. C. problems in psychology
IRINA_888 [86]

Answer:

the answer is A

Step-by-step explanation:

5 0
2 years ago
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