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4 years ago

Ayuda:C

Mathematics

1 answer:

nekit [7.7K]4 years ago

6 0

Answer:

Step-by-step explanation:

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7x-6y=9 5x+2y=19 Solve the system using elimination.

ikadub [295]

Step-by-step explanation:

multiply 5x+2y=19 by 3 youll get 15x+6y=57

eliminate y

7x-6y=9

15x+6y=57 +

22x=66

x=3

substitute x to 5x+2y=19

15+2y=19

2y=4

y=2

4 0

3 years ago

A basket contains red balls, green balls, and white balls. There are 12 red balls in the basket. The probability of randomly cho

weqwewe [10]

I believe the best answer would be D

3 0

3 years ago

Read 2 more answers

noname [10]

Answer:

The simultaneous inequation representing the recomended storage temperature is:

$50\,^{\circ}F \leq T \leq 55.4\,^{\circ}F$

Step-by-step explanation:

In this case, the statement must be represented mathematically by a simultaneous inequation, in which temperature must be equal to or greater than 10 ºC, expressed in Fahreheit degrees, and equal or less than 13 ºC, expressed in Fahrenheit degrees.

Bounds can be converted into Fahrenheit degrees from Celsius degrees:

$T_{F} = \frac{9}{5} \cdot T_{C}+32\,^{\circ}F$ (Eq. 1)

Where:

$T_{C}$ - Temperature, measured in Celsius degrees.

$T_{F}$ - Temperature, measured in Fahrenheit degrees.

Lower bound ( $T_{C} = 10\,^{\circ}C$ )

$T_{F} = \frac{9}{5}\cdot (10\,^{\circ}C) + 32\,^{\circ}F$

$T_{F} = 50\,^{\circ}F$

Upper bound ( $T_{C} = 13\,^{\circ}C$ )

$T_{F} = \frac{9}{5}\cdot (13\,^{\circ}C) + 32\,^{\circ}F$

$T_{F} = 55.4\,^{\circ}F$

The simultaneous inequation representing the recomended storage temperature is:

$50\,^{\circ}F \leq T \leq 55.4\,^{\circ}F$

6 0

3 years ago

How to solve 42j+18-19j=-28

Kryger [21]

Answer:

j=-2

Step-by-step explanation:

42j+18-19j=-28

Combine like terms

23j +18=-28

Subtract 18 from each side

23j +18-18 = -28 -18

23j =-46

Divide each side by 23

23j/23 = -46/23

j = -2

5 0

3 years ago

Read 2 more answers

A piece of rope is 70 inches long is to be cut into 2 pieces How long will each piece be if one piece is cut four times longer t

liq [111]

The long piece is 4 times the length of the short piece.

Short piece = 1 time
Long piece = 4 times
--------------------------------
Full rope = 5 times

5 times = 70 inches

Divide each side by 5 : 1 time = 14 inches

Short piece = 1 time = 14 inches

Long piece = 4 times = 4 x 14inches = 56 inches

Check:

Ratio of long to short = 56inches / 14inches = 4

Sum of both pieces = (56 + 14) = 70 inches

yay !

5 0

3 years ago