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kodGreya [7K]
3 years ago
12

Write the quadratic equation in standard form: 5x – 20 = 3x2

Mathematics
1 answer:
wariber [46]3 years ago
5 0

Answer:

5x=26

Step-by-step explanation:

multiply the numbers

move the constant to the right

add numbers

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All of the following expressions have a value of 3 except _____. A -3(4 - 5) B |-2| + 1(3 - 2) C -8 ÷ -4 + 1 D 6 - 5 · 3
irakobra [83]
Answer choice D, A,B, and C both equal 3.
5 0
3 years ago
Read 2 more answers
Silicon wafers are scored and then broken into the many small microchips that will he mounted into circuits. Two breaking method
antoniya [11.8K]

Answer:

a

The estimate is  - 0.0265\le  K \le  0.0465

b

Method B this is because the faulty breaks are less

Step-by-step explanation:

The number of microchips broken in method A is  n_1 = 400

The number of faulty breaks of method A is  X_1 = 32

 The number of microchips broken in method B is  n_2  = 400

 The number of faulty breaks of method A is  X_2 = 32

  The proportion of the faulty breaks to the total breaks in method A is

       p_1 = \frac{32}{400}

      p_1 = 0.08

 The proportion of the faulty to the total breaks in method B is

      p_2 =  \frac{28}{400}

     p_2 =  0.07

For this estimation the standard error is  

      SE =  \sqrt{ \frac{p_1 (1 - p_1)}{n_1}  + \frac{p_2 (1- p_2 )}{n_2} } }

  substituting values

       SE =  \sqrt{ \frac{0.08 (1 - 0.08)}{400}  + \frac{0.07 (1- 0.07 )}{400} } }

      SE = 0.0186

The z-values of confidence coefficient of 0.95 from the z-table is  

       z_{0.95} =  1.96

The difference between proportions of improperly broken microchips for the two breaking methods is mathematically represented as

        K = [p_1 - p_2 ] \pm z_{0.95} * SE

substituting values

        K = [0.08 - 0.07 ] \pm 1.96 *0.0186

         K  =  - 0.0265 \ or  \ K  =  0.0465

The interval of the difference between proportions of improperly broken microchips for the two breaking methods is  

      - 0.0265\le  K \le  0.0465

3 0
3 years ago
Points C, D, and G lie on plane X. Points E and F lie on plane Y.Which statements are true? Select three options.
Slav-nsk [51]

Answer:

2nd , 3rd, & 4th

Step-by-step explanation:

4 0
3 years ago
Write the equation as a single logarithm.
ch4aika [34]

Answer:

B-log(x-4)

Step-by-step explanation:

Have a nice day lol i just know things

7 0
3 years ago
60% of a number is 54. what is 50% of the same ?
tangare [24]

Answer:

The answer is 45.

Step-by-step explanation:

60% of a number is 54, find the original number

54 ÷ 60%

= 54 ÷ 60/100

= 54 * 100/60

= 90

50% of 90 is

90 * 50%

= 90 * 50/100

= 90 * 1/2

= 45

3 0
3 years ago
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