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olga2289 [7]
4 years ago
11

6x+5y=39 3x+5y=27 Solveing systems by elimination

Mathematics
2 answers:
Flauer [41]4 years ago
8 0
6x + 5y = 39 ......(i)

3x + 5y = 27.....(ii)

Because of the 5y in both equations (i) and (ii), we subtract, so as to eliminate y

6x + 5y = 39 ......(i)
-
3x + 5y = 27.....(ii)
______________
3x  + 0  = 12


3x = 12
x = 12/3 = 4,  x = 4.

Substituting into  3x + 5y =27,  x = 4

3*4 + 5y = 27

12 + 5y = 27

5y = 27 - 12

5y = 15

y = 15/5

y = 3

So the solutions are  x = 4, y = 3.

Hope this helped.
Keith_Richards [23]4 years ago
6 0
X=4 and Y=3 If you need to the work shown I can put a picture
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2 years ago
There are 7 people on a cycling team. Their coach mush pick two of them to be Co - Captain. How many different pairs can the cou
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4 0
4 years ago
EXPERTS AND ABOVE ONLY
yawa3891 [41]
1. This must be greater than or equal to 0 (there can't be any negatives!)
8 - .5t ≥ 0.
8 ≥ .5t 
t ≤ 16
D. 

2. 4(2x-1) = 2x + 35
8x - 4 = 2x + 35
6x = 39
x = 6.5
H.

3. c = .8(x-15) = .8x-12
A.

4. m = number of marble cupcakes
s = number of strawberry shortcake cupcakes

6m + 8.5s = 391
m = 1/2s
6(.5s)+8.5s = 391
11.5s = 391
s = 34
m = 17
F.

5. B
6. Use substitution
2x + 3x = 10
5x = 10
x = 2

7.  (sorry I'm not sure!)

8. G
9. L = number of balls
B = number of bats
L + B = 100
B = 100 - L
4.5L+20B = 822
4.5L + 20(100-L) = 822
4.5L -20L + 2000 = 822
1178 = 15.5L
L = 76

10. J

8 0
3 years ago
What is the base of the exponential function?
jeka94

Answer:

the answer might be 0.86 I don't know though

4 0
3 years ago
Help find out what the x is please
miss Akunina [59]

Answer:

x=4

Step-by-step explanation:

First you want to add 8.8 to 7.2 and get 16 because you want to get x alone

Next divide divide 4x on both sides so 4x/4x cross out and left with just x. 16/4 =4

x=4

Hope this helps!


6 0
4 years ago
Read 2 more answers
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