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3 years ago

1. Find the slope of a line that passes through the two points (-2,-2) and (-1,7).

Mathematics

1 answer:

emmasim [6.3K]3 years ago

6 0

Hope it helped! I have to use 20 characters sooooooo

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Which of the following is the simplest form of this expression?

Readme [11.4K]

The numerator could be written a⁴/⁵

The denominator could be written a²/³

Now solve ( a⁴/⁵) / (a²/³) ==> a⁽⁴/⁵ ⁻²/³) = a⁽²/¹⁵)

This is the simplest way

4 0

3 years ago

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A random sample of 85 group leaders, supervisors, and similar personnel revealed that a person spent an average 6.5 years on the

strojnjashka [21]

Answer:

95% of confidence interval for the Population

( 6.1386 , 6.8614)

Step-by-step explanation:

Step( i ):-

Given random sample size 'n' =85

Mean of the sample size x⁻ = 6.5 years

Standard deviation of Population = 1.7 years

Level of significance = 0.95 or 0.05

Step(ii):-

95% of confidence interval for the Population is determined by

$(x^{-} - Z_{0.05} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.05} \frac{S.D}{\sqrt{n} })$

$(6.5 - 1.96\frac{1.7}{\sqrt{85} } , 6.5 + 1.96 \frac{1.7}{\sqrt{85} })$

( 6.5 - 0.3614 , 6.5 + 0.3614 )

( 6.1386 , 6.8614)

Conclusion:-

95% of confidence interval for the Population

( 6.1386 , 6.8614)

8 0

3 years ago

(a 3 - 2a + 5) - (4a 3 - 5a 2 + a - 2)

rosijanka [135]

(a^3 - 2a + 5) - (4a^3 - 5a^2 + a - 2)
=a^3 - 2a + 5 - 4a^3 + 5a^2 - a + 2
= -3a^3 + 5a^2 - 3a + 7

5 0

2 years ago

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Help: I am a number between 60 and 100. My ones digit is six less than my tens digit. I am a prime number.

Reptile [31]

Answer:

Let's name the digit:

x- ones digit

y - tens digit

we know that x=y-2.

Now, y can be 6,7,8,9 (the number is between 60 and 100 (so depending on your understanding of "between", 0 is also possible. but then the number would have to have -2 as its ones digit, so in any case, it's not possible).

So the possibilities with x=y-2:

Out of those 64 and 86 are even, so they can't be prime.

75 has 5 in its ones number: it's divisible by 5.

so the correct answer is 97.

Step-by-step explanation:

Hope this helps!

5 0

3 years ago

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If 1 inch represents 85 miles on a map, then how many inches will represent 800 miles

Lena [83]

800/85 = 9.411764705882353‬ inches

ans = 9.411764705882353‬ inches

7 0

3 years ago

Read 2 more answers