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eduard
3 years ago
9

What is the value of 30-2(7+2)-1

Mathematics
1 answer:
Firdavs [7]3 years ago
6 0

Answer: 11

Step-by-step explanation:

30 - 2(7+2)- 1        Distribute or  solve parentheses

30 - 14 -4 - 1  

30 - 19 = 11  

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Solve the system of linear equations in two variables by elimination or substitution.
taurus [48]

Answer:

( \frac{1}{2}, 0 )

Step-by-step explanation:

Given the 2 equations

4x + 3y = 2 → (1)

2x - 3y = 1 → (2)

Adding (1) and (2) term by term will eliminate the y- term, that is

6x = 3 ( divide both sides by 6 )

x = \frac{3}{6} = \frac{1}{2}

Substitute x = \frac{1}{2} into either of the 2 equations and evaluate for y

Substituting into (1)

4(\frac{1}{2} ) + 3y = 2

2 + 3y = 2 ( subtract 2 from both sides )

3y = 0 ⇒ y = 0

Solution is ( \frac{1}{2}, 0 )

8 0
3 years ago
If you take 10 quizzes by the end of the semester and get 6 A's and 4 B's, the ratio of A's to B's is _____.
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Answer:

the ratio is 6:4 if we were reduce it, it will be 3:2

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3 years ago
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JulijaS [17]
I believe that the answer is 120 marbles.<span />
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Sandy is observing the velocity of a runner at different times. After one hour, the velocity of the runner is 4 km/h. After two
kherson [118]
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