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Wewaii [24]
3 years ago
8

Please help numbers 28 an 30

Mathematics
1 answer:
tester [92]3 years ago
7 0
28. it is not a right angle triangle because non of the angles is 90 degree
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The velocity,v of a missile is related to time t, By the equation v=5t^2+3t+1.calculate the time at which the velocity is minimu
Cloud [144]

Answer:

  • time: t = -0.3
  • minimum: v = 0.55

Step-by-step explanation:

For quadratic ax^2 + bx + c, the extreme value is found at x=-b/(2a). For your quadratic, the minimum is found at ...

  t = -(3)/(2(5))

  t = -0.3 . . . . . time of minimum velocity

__

The value of velocity at that time is ...

  v = 5(-0.3)^2 +3(-0.3) +1 = 5(.09) -.9 +1

  v = 0.55 . . . . . value of minimum velocity

3 0
3 years ago
If the team needs 3 beams and 6 channels will the grant cover the cost<br><br>(grant is 75.00)​
Nadusha1986 [10]

Answer:

Ilan lahat Ang kabuuang bilang ng mga nakalarawang bagay

8 0
3 years ago
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What times what equals 120
Dahasolnce [82]
60x2
120x1
40x3
30x4
24x5

5 0
3 years ago
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Marty has 210 coins and 48 of them are quarters. One-third of the remaining coins are dimes. How many dimes does Marty have? How
yaroslaw [1]
You were on the right track.

210 - 48 = 162

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3 0
3 years ago
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Please answer fully&gt;&gt;&gt;
svet-max [94.6K]

Let the function be represented by f(x).

Multiplying the number x by 4 results in 4x. Subtracting 2 from results give 4x - 2. So the function becomes:

f(x) = 4x - 2

Finding the inverse function:

Replace f(x) by y, and isolate x on one side of the equation and find the inverse:

y = 4x - 2\\\\ y + 2 = 4x\\\\ x = \frac{1}{4}(y + 2)\\     \\  f^{-1}(y)=\frac{1}{4}(y + 2)\\     \\  f^{-1}(x)=\frac{1}{4}(x + 2)

Yes the inverse function represents the reverse process. Original function involved multiplication by 4 and then subtraction of 2. Inverse function involves addition of 2 and then division by 4. So the inverse represents the reverse of the given process.

8 0
3 years ago
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