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serg [7]
3 years ago
9

-5 = b -2/3 b= __ Please help!

Mathematics
1 answer:
Inga [223]3 years ago
5 0

Answer:

b = -4\frac{1}{3}

or

b = -\frac{13}{3}

Step-by-step explanation:

-5 = b - \frac{2}{3}

Add \frac{2}{3} to both sides of the equation to get rid of the "- \frac{2}{3}" on the right side.

-5 + \frac{2}{3} = b - \frac{2}{3} + \frac{2}{3}

Simplify

-4\frac{1}{3} = b

b = -4\frac{1}{3}

or

b = -\frac{13}{3}

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The sum of two numbers is 14. One number is two less than 3 times the other.
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priscillacastillo2

02/10/2019

Mathematics

Middle School

answered

The sum of two numbers is 14 one number is two less than three times the other. find the numbers

1

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19K answers

399.6M people helped

Answer:

The numbers are and

Step-by-step explanation:

Let

x-----> one number

y----> the other number

we know that

------> equation A

-----> equation B

Substitute equation B in equation A and solve for y

Find the value of x

8 0
3 years ago
1 point
BARSIC [14]
The answer to this Is 38.4
7 0
3 years ago
The federal government would like to test the hypothesis that the average age of men filing for Social Security is higher than t
mixas84 [53]

Answer:

The 90% confidence interval is  -0.3433<  \mu_1 - \mu_2 < 2.1433

Step-by-step explanation:

From the question we are told that

   The sample mean for men is  \= x_1 = 64.5 \ years

    The sample mean for women is  \= x_2 = 63.6 \ years

     The sample size for men  is   n_1 = 35

      The sample size for women is  n_2 = 39

      The standard deviation for men is s_1 = 3.0

       The standard deviation for women is  s_2 = 3.5

From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90 ) \%

=>   \alpha = 0.10

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the standard error is mathematically represented as

     SE = \sqrt{\frac{s_1^2 }{n_1}  + \frac{s_2^2}{n_2} }

=>  SE = \sqrt{\frac{3^2 }{35}  + \frac{3.5^2}{39} }

=>  SE = 0.7558

Generally the margin of error is mathematically represented as

       E =  Z_{\frac{\alpha }{2} } *  SE

=>     E =  1.645  *  0.7558

=>     E =  1.2433

Generally 90% confidence interval is mathematically represented as  

      (\= x_1 - \= x_2) -E <  \mu_1 - \mu_2 <  (\= x_1 - \= x_2) -E

=>    (64.5 - 63.6) -1.2433<  \mu_1 - \mu_2

=>    -0.3433<  \mu_1 - \mu_2 < 2.1433

7 0
2 years ago
What are the zeros of the function shown in the graph? −1, 1, 2 −2, −1, 1 −3, −1, 1 −1, 1, 3
joja [24]

Answer:

Step-by-step explanation:

K

8 0
3 years ago
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