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katovenus [111]
3 years ago
13

This doesnt seem right?

Mathematics
1 answer:
DerKrebs [107]3 years ago
5 0
It seems okay to me (if that what your asking) I don't know this subject very well ut the part your working on  " I'm familiar with ?"  Don't be surprised if I was wrong buuuuut it does look okay to me "(the answer)".
You might be interested in
When visiting his parents, Tyler drives at an average speed of 42 km/h through urban areas and at an average speed of 105 km/h o
MaRussiya [10]

Answer:

  168 km

Step-by-step explanation:

Let x represent the distance Tyler drives at the slower speed, and let y represent the distance at the higher speed. Using time = distance/speed, we can write equations for the total travel time:

  x/42 +y/105 = 2.5

  x/28 +y/60 = 4.0 . . . . . 1.5 hours more than the usual 2.5 hours

Multiplying the first equation by 210, we have ...

  5x +2y = 525

Multiplying the second equation by 420, we get ...

  15x +7y = 1680

Subtracting 3 times the first of these equations from the second, we have ...

  (15x +7y) -3(5x +2y) = (1680) -3(525)

  y = 105

Putting this into the very first equation, we get ...

  x/42 + 105/105 = 2.5

  x/42 = 1.5 . . . . . . subtract 1

  x = 63 . . . . . . . . .multiply by 42.

The total distance to Tyler's parents' house is ...

  63 km + 105 km = 168 km

4 0
3 years ago
A set of equations is given below:
TEA [102]
The 3rd selection is appropriate.

.. 5b +1 = a = 3b +5
by the transitive property of equality,
.. 5b +1 = 3b +5
6 0
3 years ago
An alloy of silver and gold is to be recast with an addition of silver. This new alloy consists of 80 ounces and is to have only
Liula [17]

Answer:

What percentage of gold is in the new alloy after the recasting? 4

Step-by-step explanation:

(80/5)*(1/5)/80=0.04

5 0
3 years ago
Which expression is equivalent to 3x - (2x + 4) + 5?<br> x+1<br> x + 9<br> 5x + 9<br> 5x + 1
azamat

Answer:

x + 1

Step-by-step explanation:

3x - (2x + 4) + 5

3x - 2x - 4 + 5

x - 4 + 5

x + 1

7 0
2 years ago
the formula V= 4x3.14xr3 over 3 gives the approximate volume of a sphere if you know the radius r. Calculate V if r=3
Alinara [238K]
The answer is 113.04 should be correct...
6 0
3 years ago
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