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ivann1987 [24]
2 years ago
12

Solve by substitution 9x+y=21, -x-3=y

Mathematics
1 answer:
VashaNatasha [74]2 years ago
4 0

Answer:

point form: (3,-6)

equation form: x=3, y=-6

Step-by-step explanation:

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Can the side of a triangle have lengths 2,8,9?
photoshop1234 [79]

Answer:

Yes

Step-by-step explanation:

The smaller two sides have to be greater than the biggest side.

2+8>9, so it can make a triangle.

3 0
2 years ago
Express -5 1/4 as a decimal
rewona [7]
I believe it would be -5.25
5 0
3 years ago
Read 2 more answers
A. The solution is (−2,−3)
Cerrena [4.2K]

9514 1404 393

Answer:

  D.  (-3, -2)

Step-by-step explanation:

The equations have different coefficients for x and y, so will have one solution. The solutions offered are easily tested in either equation.

Using (x, y) = (-2, -3):

  x = y -1  ⇒  -2 = -3 -1 . . . . False

Using (x, y) = (-3, -2):

  x = y -1  ⇒  -3 = -2 -1 . . . .True

  2x = 3y  ⇒  2(-3) = 3(-2) . . . . True

The solution is (-3, -2).

__

If you'd like to solve the set of equations, substitution for x works nicely.

  2(y -1) = 3y

  2y -2 = 3y . . eliminate parentheses

  -2 = y . . . . . . subtract 2y

  x = -2 -1 = -3

The solution is (x, y) = (-3, -2).

5 0
3 years ago
Summer is having a pool party at her house In the ice chest me are of lemonade and 13 bottles of water If she randomly grabs abo
zlopas [31]
Probability  = 

       (number of ways it can come out the way you want it to)
divided by
       (total number of ways it can come out).

Total number of ways it can come out =

                    number of bottles in the cooler

                 = (10 + 15 + 13) = 38 .

Number of ways it can come out the way you want it to =

                   (soda + lemonade)

                = (10 + 15) = 25 .

Probability of coming out the way you want it to =

                     25 / 38  =  about 65.8 % .

7 0
3 years ago
First right answer for both gets brain
kirza4 [7]
B 8:00 am

8:00+1:25=9:25
9:25+25=9:50
9:50+30=10:20


B $240


60×2=120×2=240
7 0
3 years ago
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