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pashok25 [27]
3 years ago
5

Help please! Due tonight, teacher didn’t explain as well so im confused.

Mathematics
1 answer:
Jobisdone [24]3 years ago
6 0

àsdfgyoditaatistiiatiatjtatja

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2a - 3b = -11<br> a + 3b = 8
dlinn [17]

Answer:

b = 3 and a = -1

Step-by-step explanation:

You have your given equation:

2a - 3b = -11

a + 3b = 8

You need to find what a and b is.

To find b:

2a - 3b = -11

-2a - 6b = -16

I multiplied a + 3b = 8 by -2. When you multiply a number you have to multiply all of them. You have to choose a number that would cancel out all of a.

So now your equation would look like this when you solve for b:

2a - 3b = -11

-2a - 6b = -16

-------------------

a - 9 = -27 then you divide -9 to -27 which is 3 so b = 3.

To find a:

2a - 3b = -11

a + 3b = 8

I multiplied a + 3b = 8 by -1 and 2a - 3b = -11 by -1 as well.

Your equation will look like this when you solve for a:

-2a + 3b = 11

-1a - 3b = -8

------------------

-3a = 3 then divide -3 to 3 which is -1 so a = -1.

Check to see if you have the correct answer by plugging in the number you got for a and b into the equation and solve.

1. 2(-1) -3(3) = -11

 -2 - 9 = -11

2. -1 + 3(3) = 8

   -1 + 9 = 8

8 0
3 years ago
Find x if y = –2. 8 – 2xy = 24 A- 1/4 B-4 C. 8 D.-4
RoseWind [281]
Given The equation -2x(-2.8)=24, we are trying to find the value of X.

The first step is to devide both sides by 2

·-x(-2.8)=12

The next step would be to distribute.

·2.8x=12

Next we devide both Sides By 2.8 to get our final answer

·X=4.28

Although your choice answers are unclear, the answer is X=4.

-I hope this is the answer you are looking for, feel free to post your questions here on brainly in the future.




5 0
3 years ago
A triangle has side lengths of 4, inches, 10 inches, and c inches.
alexdok [17]

Answer:

c<4+10

c<14

Step-by-step explanation:

can I get brainliest?

7 0
3 years ago
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What's the additive inverse of 0.75.
Sophie [7]

Answer:

additive \: inverse =  - 0.75

6 0
3 years ago
Part 2 of Question please help me <br> and thank you for your help
san4es73 [151]

1 tick represents 8 units

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2 years ago
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