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Semenov [28]
4 years ago
10

4x-7x=13 in a fraction

Mathematics
1 answer:
Naddika [18.5K]4 years ago
4 0
4x-7x= 13
⇒ -3x= 13
⇒ x= 13/(-3)
⇒ x= -13/3

The final answer is x= -13/3~
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Mark ran a mile in 7 1/2 minutes. His brother ran a mile in 6 1/6 minutes. How much more time does Mark take to run the mile?
Bas_tet [7]

Answer:

1 1/3 more minutes

Step-by-step explanation:

Lets first convert both times to improper fractions

7 1/2 -> 15/2 (Mark's Time)

6 1/6 -> 37/6 (Mark's Brother's Time)

Now we need common denominators

15/2 = 45/6

Now times to subtract Mark's time - Mark's Brother's Time = More Time

45/6 - 37/6 = 8/6 or 1 2/6 = 1 1/3

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3 years ago
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3 years ago
What would x equal to if x equaled 4 in this: 4x
andriy [413]

Answer:

x = 4 and the expression when evaluated at x = 4, is 16.

Step-by-step explanation:

For this problem, we will simply look at the wording of the question and the given expression.  The question ask, "What would x be equal to if x equaled 4 in this: 4x?"

In the problem, we are already given that x = 4 in the following expression, so the answer to the question is x = 4.  If we were to evaluate the expression when x = 4, we would say the following:

If x = 4, then:

4x

= 4(4)

= 16

Hence, the expression would be 16 if evaluated when x = 4.

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Answer:

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3 0
3 years ago
1. A penny is dropped from the top of the empire state building. The function h(t) = -16t^2 +1250 describes the height of the pe
liubo4ka [24]

Answer: 8.83\ s

Step-by-step explanation:

Given

Height of the dropped penny is given by

h(t)=-16t^2+1250

When penny hit the ground, h(t)=0

\therefore -16t^2+1250=0\\\Rightarrow 16t^2=1250\\\\\Rightarrow t^2=\dfrac{1250}{16}\\\\\Rightarrow t=\sqrt{\dfrac{1250}{16}}\\\\\Rightarrow t=8.83\ s

Thus, it takes 8.83 s to hit the ground.

5 0
3 years ago
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