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pickupchik [31]
3 years ago
14

Im wasting my points pls answer

Mathematics
1 answer:
scoundrel [369]3 years ago
8 0

Answer:

1.

1 1/15

2.

1 7/15

3.

I think that the sister rode farther by 2/5

reason:

(the sister) 2/3 mile+4/5 mile=1 7/15

(you) 2/3 mile+2/5=1 1/15

1 7/15-1 1/15= 2/5(according to a website I used)

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n the graph below determine how many real solutions the quadratic function has, and state them, if applicable. List solutions in
IRINA_888 [86]

Answer:

There are no real solutions.

Step-by-step explanation:

There are 3 options.

2 real solutions: This happens if in the graph, each arm intersects the x-axis, this means that there are two different values of x such that the equation:

a*x^2 + b*x + c

is equal to zero.

Another way to see this, is if the determinant:

b^2 - 4*a*c

is larger than zero.

1 real solution: This happens when the vertex of the graph intersects the x-axis. This means that there is a single value of x such that:

a*x^2 + b*x + c

is equal to zero.

Another way to see this is if the determinant:

b^2 - 4*a*c

is larger equal zero.

No real solution: if in the graph we can not see any intersection of the x-axis, then we do not have real solutions (only complex ones).

Another way to see this is if the determinant:

b^2 - 4*a*c

is smaller than zero.

Now that we know this, let's look at the graph.

We can see that the vertex is below the x-axis, and the arms of the graph go downwards. So the arms will never intersect the x-axis (and neither the vertex).

So the graph does not intersect the x-axis at any point, which means that there are no real solutions for the quadratic equation.

The correct answer would be "none"

3 0
3 years ago
13/20 , 11/15 , 5/8, 7/12 from least to greatest
Sveta_85 [38]

Answer:

Least 2 Greatest:

7/12,   5/8,  13/20,  11/15

Step-by-step explanation:

Googled it

Plz say thxs and rate me!

Yours Truly.

5 0
3 years ago
In ΔEFG, the measure of ∠G=90°, the measure of ∠F=38°, and FG = 6.7 feet. Find the length of EF to the nearest tenth of a foot.
Verizon [17]

Answer:

8.5

Step-by-step explanation:

4 0
3 years ago
An isosceles triangle has an angle that measures 92°. Which other angles could be in that isosceles triangle? Choose all that ap
77julia77 [94]

Answer:

92

Step-by-step explanation:

an iscosolice triagle is a triangle with the sam lenghth on both sides

4 0
3 years ago
Help with part b pls thank u
Vlad1618 [11]

Answer:

  • See below

Step-by-step explanation:

  • speed = distance / time
  • time = distance / speed

a)

i)

<u>Time taken at the first part:</u>

  • 105 / x

ii)

<u>Time taken at the second part:</u>

  • (190 - 105) / (x + 12) =
  • 85/(x + 12)

b)

<u>If time is 3 hours and 15 minutes = 3 1/4 hours = 13/4 hours, the equation is:</u>

  • 105/x + 85/(x + 12) = 13/4
  • 4(x + 12)*105 + 4(85x) = 13x(x + 12)
  • 13x² - 604x - 5040 = 0

c)

<u>Solve the equation:</u>

  • 13x² - 604x - 5040 = 0
  • x = [604 ± √((-604)² + 4*13*5040) ]/26 =
  •      [604 ± √626896]/26 =
  •      [604 ± 791.77]/26
  • x = (604 + 791.77)/26 = 53.68 km/h (taking positive root only)

d)

  • 105/x = 105/53.68 h = 1.956 h = 1 h 0.956*60 min = 1 h 57 min (rounded)
  • 85/(53.68 + 12) = 85/65.68 = 1.294 h = 1 h 0.294*60 min = 1 h 18 min (rounded)
7 0
2 years ago
Read 2 more answers
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