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vagabundo [1.1K]
4 years ago
9

Help 11 minutes!!!!!!

Mathematics
1 answer:
Marina86 [1]4 years ago
7 0

The ordered pair is only a solution to the first equation, so it is not a solution to the system.

2 x 10 = 20    5 x 5 = 25    20 - 25 = -5     True!

10 + 2 x 5 = 11?    False!    10 + 2 x 5 = 20

So, A and C are the correct answers!

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If the rate of decrease for the partial pressure of N2H4 in a closed reaction vessel is 76 torr/h , what is the rate of change f
fiasKO [112]

The reaction is missing and it's ;

N2H4 + H2 ---> 2NH3

It asks for the total pressure too.

Answer:

A) Rate of change for NH3 = 152 torr/h

B) The total pressure in the vessel will remain the same.

Step-by-step explanation:

N2H4 + H2 ---> 2NH3

1 mole of N2H4 yields 2 moles of NH3.

From the question, the rate given for N2H4 is 76 torr/h.

Thus, The rate of change for NH3 will be = 2 x 76 = 152 torr/h

Now, on the reaction side, 1 mole of N2H4 reacts with 1 mole of H2. So we have 2 moles on the left hand side.

While on the product side, 2 moles of NH3 are produced.

So the total pressure will remain the same because for every 2 moles on the reaction side, 2 moles are gotten on the product side.

3 0
3 years ago
Dos angulos son congruentes si tienen la misma amplitud
Margarita [4]

Answer:

true

Step-by-step explanation:

2 angles are congruent when they they have the same measure

6 0
3 years ago
A ball is thrown from an initial height of 7 feet with an initial upward velocity of 30ft/s . The ball's height h (in feet) afte
exis [7]
This is a parabola. 20 ft represents the height of the ball. Height is represented by the letter h. Thus you need to plug 20 into the equation for h and solve for t.
4 0
3 years ago
If f(x) = 3x - 2 and g(x) = 2x + 1, find (f + g)(x). O A. X-1 B. x - 3 OO C. 5x-1 O D. 5X HB ​
zhenek [66]

Answer:

5x_1

Step-by-step explanation:

.......................

4 0
3 years ago
Y = -x + 10 and y = 2x + 4
igor_vitrenko [27]

Answer:

X=2, y=8

Step-by-step explanation:

Y=-x+10 equation 1

y=2x+4 equation 2

-x+10=2x+4. Substitute y of first equation into 2nd equation

-x-2x+10=4

-3x=4-10

-3x=-6

x=2

solve for y by inserting x value into either equation

y=-x+10

y=-2+10

y=8

check answer

y=2x+4

8=2(2)+4

8=4+4

8=8

8 0
3 years ago
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