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Annette [7]
3 years ago
9

When solving this system of equations by elimination, which could be the resulting equation when a variable has been eliminated?

Mathematics
1 answer:
Ostrovityanka [42]3 years ago
7 0

Answer:

Step-by-step explanation:

3x-2y=10

5x+y=4

15x-10y=50

15x+3y=12

-13y=38

y=-38/13

Substitute for y

x=54/39

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I need help with number 10
lukranit [14]
A)
Knights:
25n-C+1250=0
25n+1250=C
C=25n+1250

Legions:
30n+995-C=0
30n+995=C
C=30n+995

b)
fixed cost=b in y-intercept form
variable cost, dependent on n=m in y-intercept form
Knights:
fixed=1250
variable=25

Legions:
fixed=995
variable=30

c)
insert 45 into n for both formulas:

Knights:
25*45+1250=1125+1250=2375

Legions:
30*45+995=1350+995=2345

d)With 45 guests the Legion's Banquett Hall is cheaper, but due to the higher variable cost this changes with a few more people.
calculate break even point:
difference in variable cost=5 -> per person the cost difference will decrease by this much if another person joins
current price difference: 2375-2345=30
30/5=6 -> if there are 6 additional guest (total= 51) they will cost the same
if there are more than 6 additional guest (total >51) the knight's banquett will be cheaper.


6 0
3 years ago
HELP ASAP PLEASE <br> Find the area of the figure.
WITCHER [35]

Answer:

39.82

Step-by-step explanation:

to find the entire area of the figure, you'll have to split it up into two parts:

   a. triangle

   b. semi-circle

therefore, the formula for the area of a triangle is 1/2(base)(height). in simpler terms, it means to multiply 1/2 by the base and the height. in this case, multiply 1/2 x 5 x 12, which gives you 60/2, which ultimately gives you 30.

to find the area of the semi circle, use the area formula for a circle and divide the area by 2. the formula is: πr^{2}. so, plug in your lengths. this gives you, π(5)^2. divide this by two. you should get an answer of 9.82

finally, add your two areas (30+9.82), which equals 39.82

hope this helps!<3

4 0
2 years ago
Someone pls HELP RN IM IN A HURRY
Serga [27]

BC AB AC

Step-by-step explanation:

the longer the side is visually detected ok

7 0
2 years ago
What is 50 + 34 - (87)-23 ?????????????
Alekssandra [29.7K]

Answer:

-26

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Math 2 5.3 Triangle worksheet 1-8
AnnZ [28]

1) m<DCB = <D + <C + <B

180 = 25 + 90 + <C  (Angle Sum Property)

180 = 115 + <C

180 - 115 = <C

65 = <C

5 0
2 years ago
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