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hichkok12 [17]
2 years ago
6

Can you please help me i will give brainly to yall if u answer please help me please go through all the images

Mathematics
1 answer:
Angelina_Jolie [31]2 years ago
6 0

Answer:

her inequality is incorrect

the number of hours is greater than or equal to 6

(not sure about the first two questions cause the question is kinda confusing. just know that the inequality in the question represents "x is less than or equal to 6")

their number line is incorrect

the number line is correctly filled in

the lien should be shaded to the left

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Limit of x^2-81/x+9<br> As x goes toward -9
Semmy [17]
Hello,

Use the factoration

a^2 - b^2 = (a - b)(a + b)

Then,

x^2 - 81 = x^2 - 9^2

x^2 - 9^2 = ( x - 9).(x + 9)

Then,

Lim (x^2- 81) /(x+9)

= Lim (x -9)(x+9)/(x+9)

Simplity x + 9

Lim (x -9)

Now replace x = -9

Lim ( -9 -9)

Lim -18 = -18
_______________

The second method without using factorization would be to calculate the limit by the hospital rule.

Lim f(x)/g(x) = lim f(x)'/g(x)'

Where,

f(x)' and g(x)' are the derivates.

Let f(x) = x^2 -81

f(x)' = 2x + 0
f(x)' = 2x

Let g(x) = x +9

g(x)' = 1 + 0
g(x)' = 1

Then the Lim stay:

Lim (x^2 -81)/(x+9) = Lim 2x /1

Now replace x = -9

Lim 2×-9 = Lim -18

= -18




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3 years ago
Which expression is equivalent to −4(2x − 8)−2x ?
Vesnalui [34]
C. -10x+32

Explanation: Solve the problem
( -4(2x-8)-2x )
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Tanya [424]

Answer:

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Step-by-step explanation:

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Which could be the measures of the three angles of an acute triangle.
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An acute angle is less than 90 degrees 
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Step-by-step explanation:

20/5 = 4

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