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s2008m [1.1K]
3 years ago
13

need help fr now becuz its for a test but i dont get it at all cuz i skip class but still ye plzzzzzz help

Mathematics
2 answers:
Harman [31]3 years ago
6 0

Answer:

jhgfehrfyebfbf sorry

Step-by-step explanation:

ivann1987 [24]3 years ago
3 0

Answer:

-\frac{11}{12}

Step-by-step explanation:

Solve for top first

\frac{5}{8}+\frac{3}{4}

Find common denominator, which in this situation is 8. So multiply 3/4 by 2/2:

\frac{5}{8}+\frac{6}{8} = \frac{11}{8}

Now find the bottom of the fraction:

-\frac{2}{3} -\frac{5}{6}

Find common denominator, which in this situation is 6. Multiply -2/3 by 2/2:

-\frac{2}{3} -\frac{5}{6} = -\frac{9}{6} = - \frac{3}{2}

Now you will see the problem as this:

\frac{11}{8}/-\frac{3}{2}

Keep, change, flip. Keep the 11/8 as it is, change the division sign to multiplication sign, and flip the -3/2 to -2/3

\frac{11}{8}(-\frac{2}{3}) = -\frac{22}{24} =-\frac{11}{12}

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If the cost price of a bag is AED 2176 and its selling price is AED 2497 then find the profit
ICE Princess25 [194]

Answer:

321 AED

Step-by-step explanation:

2497 - 2176 = 321 AED

6 0
3 years ago
Which of the following is the sum of both solutions of the equation <img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2Bx-42%3D0"
AysviL [449]

Answer: x=6 or x=-7

Step-by-step explanation:

Step 1: Factor left side of equation: (x-6)(x+7)=0

Step 2: Set factors equal to 0: x-6=0 or x+7=0

Get your answer: x=6 or x=-7

5 0
3 years ago
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
"the product of a number 4 is -7
Lunna [17]
4x=-7  is the answer because "the number" should be the variable
5 0
3 years ago
Which equation could represent the relationship shown in the scatter plot?
Marysya12 [62]
Your answer is c
.............................
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4 0
3 years ago
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