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salantis [7]
3 years ago
14

3x = -y + 12 2x + 3y = -6

Mathematics
1 answer:
tangare [24]3 years ago
3 0

Answer:

3x=-y+12

2x+3y=-6

collecting the like terms we have

3x+y=12

2x+3y=-6

to solve this simultaneous equation, we use substitution method

we make y the subject in equation one:

y=12-3x

then we put y=12-3x into 2x-3y=-6 in equation two

2x+3(12-3x)=-6

2x+36-9x=-6

-7x+36=-6

-7x=-6-36

-7x=-42

x=-42÷-7

x=6

then we put x=6 in y=12-3x:

y=12-3x

y=12-3(6)

y=12-18

y=-6

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The answers are <br><br>175cm2 <br><br>516cm2<br><br>1548cm2 <br><br>4644cm2​
r-ruslan [8.4K]

Answer:

the answer is 516

Step-by-step explanation:

you would multipy the SA by the scale factor and get B

8 0
3 years ago
Use the first three triominoes to find the missing number in the fourth triomino. –7 –9 –11 –13
Molodets [167]
<u><em>Answer:</em></u>
-9

<u><em>Explanation:</em></u>
<u>From the first three </u><span><u>triominoes, we can note that:</u>
number on center = -first base - second base + vertex

<u>This is verified as follows:</u>
<u>For the first one:</u>
The two bases are 7 and 9 and the vertex is 1
- first base - second base + vertex = -7 -9 + 1 = -16 + 1 = -15 

<u>For the second one:</u>
The two bases are 0 and 9 and the vertex is 8
- first base - second base + vertex = -0 -9 + 8 = -9 + 8 = -1

<u>For the third one:</u>
The two bases are 6 and 4 and the vertex is 2
- first base - second base + vertex = -6 - 4 + 2 = -10 + 2 = -8

<u>Applying the same procedure on the last one:</u>
The two bases are 7 and 2 and the vertex is 0
-first base - second base + vertex = -7 - 2 + 0 = -9 + 0 = -9

Hope this helps :)</span>
5 0
3 years ago
Read 2 more answers
Please help!!!!due at 11 .I think the number of sodas sold was 48 but I don't know how many hotdogs were sold
Alex Ar [27]

Answer:

Number of sodas sold: 78

Number of hot dogs sold: 24

Step-by-step explanation:

Number of sodas sold = x

Number of hot dogs sold = x - 54

Total number of sodas and hot dogs = x + x - 54 = 2x - 54

Total number = 102

2x - 54 = 102

2x = 156

x = 78

Number of sodas sold = x = 78

Number of hot dogs sold = x - 54 = 78 - 54 = 24

Answer:

Number of sodas sold: 78

Number of hot dogs sold: 24

6 0
3 years ago
Tea is made up of milk and tea ratio of 2 to 9. how much tea can be made using 1 litre of milk
Ilya [14]
You can solve it like this

2=milk (a); 1=milk (b)
9=tea (a); x= tea (b)

2:9=1:x (then multiply means and the extremes)
(means are 9 and 1; extremes are 2 and x)

9=2x
9/2= x
4.5 or 4 1/2=x

Therefore, using 1 litre of milk, we can have 4 1/2 tea.



3 0
3 years ago
During a hoagie sale fundraiser a ski club sold 42 italian hoagies, and 53 roast beef hoagies. What is the ratio of hoagies sold
Dmitriy789 [7]
The total number of hoagies sold is equal to the sum of Italian hoagies and roast beef hoagies. So,
42 + 53 = 95

Thus, the ratio is 42 : 95
7 0
3 years ago
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