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AysviL [449]
3 years ago
6

Stefanie swam four-fifths of a lap in the morning and seven-fifteenths of a lap in the evening. How much farther did Stefanie sw

im in the morning than in the evening?
Mathematics
1 answer:
ddd [48]3 years ago
4 0
Stefanie swam 1/3 further in the morning.
4/5 - 7/15
12/15 - 7/15 = 5/15
5/15 = 1/3
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Help appreciated!!<br> (Will mark as Brainliest)
Vinvika [58]

Answer:

14.9

Step-by-step explanation:

First you square 14 which is 196, then you square 5 which is 25. You would then add them which is 221. You find the square root of 221, that is 14.8660687473 . The answer says to round to the nearest tenth which becomes 14.9.

Hope this helps:)

7 0
3 years ago
By what percent will the number change. you find one third of a number
KonstantinChe [14]
Hope this helps you :)

4 0
2 years ago
Angles 1 and 2 are completely and congruent what is the measure of angle 1
Anna71 [15]

Answer:

180

Step-by-step explanation:

If the awnsers are equal and make a full 360 angle, the angle of one of them is 180 because that is half of 360.

4 0
3 years ago
Need an answer for question 7 HURRY PLEASE 20 POINTS
Andrei [34K]

Answer:

2x^2 = 6x - 5.

-x^2 - 10x = 34.

These have only complex roots/

Step-by-step explanation:

3x^2 - 5x = -8

3x^2 - 5x + 8 = 0

There are complex roots if the discriminant  9b^2 - 4ac) is negative.

Here the discriminant D = (-5)^2 - 4*-5*8 = 25 + 160

This is positive so the roots are real.

2x^2 = 6x - 5

2x^2 - 6x + 5 = 0

D = (-6)^2 - 4*2*5 =  36 - 40 = -4

So this has no real roots only complex ones.

12x = 9x^2 + 4

9x^2 - 12x + 4 = 0

D = (-12)^2 - 4*9 * 4 = 144 - 144 = 0.

- Real roots.

-x^2 - 10x = 34

x^2 + 10x + 34 = 0

D = (10)^2 - 4*1*34 = 100 - 136 = -36.

No real roots = only complex roots.

7 0
3 years ago
Suppose that F(x) = x^3 and G(X) = -3x^3. Which statement best compares the
Alik [6]

Answer:

D. The graph of G(x) is the graph of F(x) flipped over the y-axis and

stretched vertically.

Step-by-step explanation:

since there is a negative, there must be a reflection. the reflection is over the y-axis because it is outside the x-value (-F(x) not F(-x))

the same goes for the vertical stretch. we know it is a vertical stretch because the 3 is outside the x-value (3F(x) not F(3x))

6 0
3 years ago
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