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Lady bird [3.3K]
2 years ago
11

8x+9y=-28 -4x=y solve the system by subsitution

Mathematics
2 answers:
bixtya [17]2 years ago
8 0

Answer:

x= 1

y = -4

Step-by-step explanation:

8x + 9y = -28

-4x = y

8x + 9(-4x) = -28

8x - 36x = -28

-28x = - 28

x = 1

y = -4(1) = -4

Zielflug [23.3K]2 years ago
6 0

Answer:

2

Step-by-step explanation:

8 + 9 = 17

17y = 28

28 / 17 = 1.64

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Substitution<br> 1.y=-5x-19<br> y=-6x-24<br><br> 2.y=-6x-22<br> y=-3x-10
omeli [17]

Answer:

1. y=5 and x=-5

2. y=2 and x=-4

Step-by-step explanation:

1.y=-5x-19

y=-6x-24

since both equations are equal to y, they are also equal to eachother

-5x-19=-6x-24

addition P.O.E.

x-19=-24

addition P.O.E.

x=-5

substitute x into one equation

y=-5*-5-19

y=6

2. y=-6x-22

y=-3x-10

since both equations are equal to y, they are also equal to eachother

-6x-22=-3x-10

addition P.O.E.

-22=3x-10

addition P.O.E.

-12=3x

division P.O.E.

-4=x

substitute x into one equation

y=-3*-4-10

y=2

5 0
3 years ago
A circle has a diameter of 57 in
goldenfox [79]

Answer:

89.49 if is the entire circle and 44.745 if is a semi circle

Step-by-step explanation:

57 / 2 = 28.5  this is the ratio

28.5 * 3.14 = 89.49

7 0
3 years ago
Jerome recently moved to a new city and bought a home. The assessment rate is 51%. The property tax rate is $53.26 per $1000. Wh
mrs_skeptik [129]
Given:
assessment rate = 51%
tax rate = 53.26 per 1,000

53.26 / 1000 = 0.05326
0.05326 x 100% = 5.326%

Effective tax rate = assessment rate * tax rate
ETR = 51% * 5.326%
ETR = 2.72%



8 0
4 years ago
What is 45x3,679= what is the sum
Westkost [7]

Answer:

679

Step-by-step explanation:

5 0
3 years ago
Jane brought x shirts for $20 each and y skirts for $25 each she spent $210 in all. which equation represents this situation 2
miv72 [106K]

Answer:

Part A

20x + 25y = 210 --> D.

Part B

If jane purchased exactly 4 shirts she must have purchased Exactly ___ skirts. (round to the nearest tenth)

20*4 + 25y = 210 --> y = 5.2

is it possible for jane to purchase exactly 4 shirts? ____(yes or no)

no, because she can't buy 5.2 skirts.

5 0
4 years ago
Read 2 more answers
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