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posledela
3 years ago
15

PLS HELP ME I need this done super fast plsss

Mathematics
1 answer:
lawyer [7]3 years ago
4 0
25) 2%, 2 x 10^(-1), 0.2 with the bar on top, 7/25, 4^(-1), square root of 2

26) 51.2%, 35/2, 4.8 x 10^2, 8^3, 3^6, 1.7 x 10^3

27) 5^(-2), 5%, 1.25 x 10^(-1), 1/2, square root of 5, cube root of 125

28) 7.81 x 10^1, square root of 61, cube root of 343, 0.78, 7/9, 8%

29) 2/5, square root of 1/9, 0.3, 3^(-2), 3.4 x 10^(-2), 3%

I can't fully see 30
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What is the solution to the system of equations below?
Vanyuwa [196]

Answer:

A. (–8, 2)

Step-by-step explanation:

(1)       y =  ½x + 6  

(2)       y = -¾x –  4     Set (1) = (2)  

½x +   6 = -¾x –  4     Multiply each side by 4

2x  + 24 = -3x – 16     Add 16 to each side

2x  + 40 = -3x              Subtract 2x from each side  

        40 = -5x              Divide each side by -5

(3)       x = -8                 Substitute (2) into (1)

          y = ½(-8)  +6

             = -4 + 6

             =  2

The solution to the system of equations is (-8 ,2).

You can see the graphs of the two functions in the figure below. The two lines intersect at (-8, 2).

Check:

2 = ½(-8) + 6     2 = -¾(-8) - 4

2 = -4 +6           2 = 6 - 4

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Solve the inequality and express your answer in interval notation<br> x^2+8x+5 &lt;0
irakobra [83]

The interval notation is (-\sqrt{11}-4, \sqrt{11}-4)

Explanation:

The inequality is x^{2}+8 x+5

Let us complete the square, we get,

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Simplifying, we have,

(x+4)^{2}+5-4^{2}

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Adding both sides of the equation by 11, we get,

(x+4)^{2}

Since, we know that for u^{n} , if n is even then -\sqrt[n]{a}

Thus, writing the above expression in this form, we get,

-\sqrt{11}

Also, if a then a and u

Then ,we have,

-\sqrt{11} and x+4

Solving the inequalities, we get,

-\sqrt{11}\ \ \ \ \ \  and  x+4

Merging the intervals, we have,

-\sqrt{11}-4

Hence, writing the solution in interval notation, we have,

(-\sqrt{11}-4, \sqrt{11}-4)

Therefore, the answer is (-\sqrt{11}-4, \sqrt{11}-4)

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