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3 years ago

-a+(-b) where a= 6.05 and b= 3.611

Mathematics

1 answer:

Alenkasestr [34]3 years ago

6 0

Answer:

-9.661

Step-by-step explanation:

In the given equation, a and b are negative. The values of a and b are given. If you insert the values into the given formula, the values become negative because of "-" in front of the a and b values.

-a + (-b) = -6.05 + (-3.611)

Because the second value is negative, the plus sign references to adding BOTH negative values together so it is just the same as saying:

-6.05 - 3.611

This gives you -9.661

Hope this helps!

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1 year ago

Expressions can be written using a combination of numbers and letters. Those values can also be described using words. Choose AL

Serga [27]

WQJAbnuhajle hove ukleg disklhdnd obisolsyhdgo fibpiouhod09ziusvcevn Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Simplifyng algebraic expressions -2z-3w+7+8 use z=3 and w=9

Anettt [7]

Answer:

-9

Step-by-step explanation:

Substitute 3 for z and 9 for w in the equation.

$- 2z - 3w + 7 + 8$

$- 2(3) - 3(9) + 15$

$- 6 - 18 + 15$

$- 24 + 15$

$- 9$

7 0

3 years ago

In a new experimental teaching method, when students have questions in class, they send them to the instructor via a laptop comp

Anna007 [38]

Answer:

a) (0.124, 0.435)

b) I am 95% confident that the proportion difference is between 0.124 and 0.435

Step-by-step explanation:

Given that:

For male students: number of male students ( $n_m$ ) = 69, number who liked the new method (x) = 38

For female students: number of female students ( $n_f$ ) = 73, number who liked the new method (x) = 20

a) The probability that a male student like the new method ( $P_1$ ) is given as:

$P_1=\frac{38}{69} =0.55$

The probability that a female student like the new method ( $P_2$ ) is given as:

$P_2=\frac{20}{73} =0.27$

c = 95%, α = 1 -c = 0.05

$z_{\frac{\alpha }{2} }=1.96$

the difference between the proportions of male and female students who like the new method better = $P_1-P_2$ ± $z_{\frac{\alpha }{2} }\sqrt{\frac{P_1(1-P_1)}{n_m} +\frac{P_2(1-P_2)}{n_f}}$ = $0.55-0.27$ ± $1.96\sqrt{\frac{0.55(1-0.55)}{69} +\frac{0.27(1-0.27)}{73}}$ = (0.124, 0.435)