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galina1969 [7]
4 years ago
12

What equal z=? I'm to confused she didn't tell us how to do it

Mathematics
1 answer:
AleksandrR [38]4 years ago
7 0
First add 19 over so that you are left with z/4 by itself. Then to get z by itself multiply both sides by 4. 
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How do I simplify 6x+8/4x+4?
Molodets [167]
2(3x + 4) / 2(2x + 2)
Cancel the factored 2s

3x + 4 / 2x + 2

You may need to further factor the denominator, depending on the teacher.

3x + 4 / 2(x + 1)
6 0
3 years ago
Read 2 more answers
What is the value of cos θ given that (-2, 9) is a point on the terminal side of θ?
liq [111]

Answer:

a)  cosθ  = \frac{-2\sqrt{85} }{85}

Step-by-step explanation:

<u><em> Step(i):</em></u>-

Given point ( x , y ) = ( - 2 , 3 )

We know that the polar co-ordinates

  x = r cos θ and y = r sinθ

where   r = \sqrt{x^{2} +y^{2} }  

            r = \sqrt{(-2)^{2} +(9)^{2} } = \sqrt{4+81} = \sqrt{85}

<u><em>Step(ii)</em></u>:-

           x = r cos θ

          cosθ   = \frac{x}{r}

      cosθ  = \frac{-2}{\sqrt{85} } = \frac{-2}{\sqrt{85} } X \frac{\sqrt{85} }{\sqrt{85} }

       cosθ  = \frac{-2\sqrt{85} }{85}

3 0
3 years ago
20 % of 2 is equal to <br><br> A. 20 <br> B. 4 <br> C. 0.4 <br> D. 0.04
ExtremeBDS [4]
I think the answer is 0.4

4 0
3 years ago
C. Assessment
Crazy boy [7]
1. B
2. A
3. A
All of theses are true
4 0
3 years ago
When solving a system of inequalities, which of the following methods are used? A.guess and check
yarga [219]

Answer:

Option B - graphing is the correct answer.

Step-by-step explanation:

To solve a system of inequalities we need graphing. Inequality tells us about the relative size of two values. When we graph the x and y co-ordinates, the solution is not the drawn line, but the area of the coordinate plane that satisfies the inequality. In inequalities, multiple solutions can be possible.

Plug and chug method does not a complete solution, it only tells where a point belongs. Guess and check does not apply here.

7 0
4 years ago
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