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BlackZzzverrR [31]
2 years ago
12

NEED ANSWER ASAP!!

Mathematics
1 answer:
erik [133]2 years ago
7 0

Answer:

A=-2; B=-1

Step-by-step explanation:

3a - 2b + 4 =0

2a -5b -1 = 0

Let's multiple the top equation by 2, and the bottom by -3, and then use addition.

[3a - 2b + 4 =0]*2

[2a -5b -1 = 0]*(-3)

6a-4b+8=0

-6a+15b+3=0

Now add the two equations together:

11b + 11 = 0

Subtract 11 from both sides

11b = -11

Divide both sides by 11

b=-1

Substitute in the first equation:

3a - 2(-1) + 4 = 0

Simplify to get 3a+6 = 0

Subtract 6 from both sides to get 3a = -6

Divide both sides by 3 to get a=-2

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The graph to answer the question and the answer choices.
Natasha_Volkova [10]

Answer:

  y ≥ 3x -1; x +3y ≤ 6

Step-by-step explanation:

Both lines are solid, so the only viable choices are those with "or equal to" in the comparison operators: the 2nd and 4th choices.

The line with a slope of +3 is shaded <u><em>above</em></u> the line, so that will correspond to the inequality ...

  y ≥ 3x -1 . . . . . . . . . . found only in the 4th choice.

7 0
3 years ago
There is a number that if you multiply it by 4 first, and then subtract 10 from the result, you get 14. What's the number.
polet [3.4K]
It's 6. 6 times 4 is 24, and 24 minus 10 is 14
6 0
4 years ago
1/4 times 8/8 what is the answer to this problem
Ann [662]
\frac{1}{4}
7 0
3 years ago
What is 800x50+67-5=
Margarita [4]
40,062.
Multiplication is first. Then we do 800x50, which is 40,000. Then we add 67, which becomes 40,067. Lastly, we subtract 5 which becomes 40,062. 
6 0
3 years ago
Abdullah earns $10 an hour delivering newspapers on his bicycle . He started with $20 in his bank account. what is the rate and
elixir [45]

Explanation:

The equation for this problem can be modeled in y = mx + b form.

m represents the rate of change and b represents the initial value or constant.

y = 10x + 20

x represents the number of hours he spent delivering newspapers

y is his total money after whatever number of hours he worked

The rate is 10, because it determines how much money he earns for each hour.

The y-intercept is 20, representing the starting amount of money in his bank account.

6 0
3 years ago
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