Ineed the answers because i honestly don’t know the answers . coordinate algebra is very hard and i need !

answer:

(4,-3) and (-2,5)

step-by-step explanation:

if we reflect over the x axis   the point (x,y) becomes (x,-y)

so the point p at (4,3) becomes (4,-3)

and the point r at (-2,-5) becomes (-2,5)

scientific notation is just a form of the number:

and the format is:

(a number greater than 1 but less than 10) times (10 to the power of x) ,where x can be positive or negative, but not a fraction or decimal

answer:

walking speed = 2 mph.

running speed = 8 mph.

step-by-step explanation:

let her walking speed be x mph, then her running speed is x + 6 mph

speed = distance / time. take the first 1 1/2 hours:

x + 6 =   y / 1.5   where y = distance travelled in that time

rewriting:

x + 6 = 2y / )

and the last 3 hours:

x = z / (2)   where z = distance travelled in that time.

also we have the equation:

y + z = )

substitute x = z/3 into equation (i):

z/3 + 6 = 2y/3

multiply through by 3:

z + 18 = 2y

2y - z = 18 )

y + z = )   adding these 2 equations:

3y = 36

y = 12 miles,

so z = 18 - 12 = 6 miles.

now find   the value of x:

from equation (2):

x =   z/ 3

= 6/3

= 2 mph.

therefore running speed = 2 + 6 = 8 mph.

answer:

- 1.613 = -1.6 or -1.61

-1.522 = -1.5 or -1.52

0.587 = 0.6 or 0.59

3.079 = 3.1 or 3.08