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irga5000 [103]
3 years ago
6

Which is the best description of 4 (21x÷7)

Mathematics
1 answer:
Lera25 [3.4K]3 years ago
4 0
If by description you mean simplification then: 84x/28
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You and a friend are each driving a car in opposite directions. You both leave your house at the same time. If you are traveling
aksik [14]

Answer:

y = a - b(5) i think that's it

Step-by-step explanation:

7 0
3 years ago
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At time t ≥ 0, the velocity of a body moving along the s-axis is v = t² -5t +4. When is the body moving backwards
katovenus [111]

Answer:

A

Step-by-step explanation:

The velocity of a moving body is given by the equation:

v=t^2-5t+4 ,\, t\geq0

Is the velocity is <em>positive </em>(v>0), then our object will be moving <em>forwards</em>.

And if the velocity is negative (v<0), then our object will be moving <em>backwards</em>.

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v

By substitution:

t^2-5t+4

Solve. To do so, we can first solve for <em>t</em> and then test values. By factoring:

(t-4)(t-1)=0

Zero Product Property:

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Now, by testing values for t<1, 1<t<4, and t>4, we see that:

v(0)=4>0,\, v(2)=-20

So, the (only) interval for which <em>v</em> is <0 is the second interval: 1<t<4.

Hence, our answer is A.

7 0
3 years ago
Which number is equivalent to 7/8
PtichkaEL [24]

Answer:

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6 0
3 years ago
Can you help me please
spin [16.1K]
It would be < and > ........


6 0
2 years ago
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Helen [10]
if the original value of x was negative then X the opposite sign version of X would have to be positive Princeton's if I start with x equals -3 then x equals -3 equals + 3 which is positive
8 0
2 years ago
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