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3 years ago

Solve the inequality:

Mathematics

2 answers:

maria [59]3 years ago

8 0

Answer:

−

Step-by-step explanation:

so its D

Nikitich [7]3 years ago

3 0

Answer:

d. x>-3

Step-by-step explanation:

3x+9>0

isolate x

3x>0-9

simplify

3x>-9

Isolate x

x>-9/3

Simplify

x>-3

Final Answer

x>-3

If this helps please mark as brainliest

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Put the numbers in order least to greatest!

Alenkinab [10]

Answer:

-2.4

-0.8

0.2

0.9

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Step-by-step explanation:

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3 years ago

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How do you determine if a relation is quadratic by calculation differences, analyzing a graph, examining the degree in an equati

Kryger [21]

1) We can determine by the table of values whether a function is a quadratic one by considering this example:

x | y 1st difference 2nd difference

0 0 3 -0 = 3 7-3 = 4

1 3 10 -3 = 7 11 -7 = 4

2 10 21 -10 =11 15 -11 = 4

3 21 36-21 = 15 19-5 = 4

4 36 55-36= 19

5 55

2) Let's subtract the values of y this way:

3 -0 = 3

10 -3 = 7

21 -10 = 11

36 -21 = 15

55 -36 = 19

Now let's subtract the differences we've just found:

7 -3 = 4

11-7 = 4

15-11 = 4

19-15 = 4

So, if the "second difference" is constant (same result) then it means we have a quadratic function just by analyzing the table.

3) Hence, we can determine if this is a quadratic relation calculating the second difference of the y-values if the second difference yields the same value. The graph must be a parabola and the highest coefficient must be 2

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11 months ago

Please help on the fraction question!

Natasha2012 [34]

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3 years ago

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the area of a rectangle is 2x^2-5-3 and the length of the rectangle is 2x+1. find the width of the rectangle

ZanzabumX [31]

Answer:

$x - 3$

Step-by-step explanation:

$\frac{2{x}^{2} - 5x - 3}{2x + 1} = \frac{[x - 3][2x + 1]}{2x + 1} = x - 3$

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3 years ago

Vlad spent 20 minutes on his history homework and then completely solved x math problems that each took 2 minutes to complete wh

frozen [14]

Answer:

y = 2x + 20

$y\geq 20$

$x\geq 0$

Step-by-step explanation:

Vlad spent 20 minutes on history. Then Vlad spent 2 minutes on each math problem for homework, this is 2x. So in total, he spent 20+2x on homework. Depending on how many problems he did, the total time y can be found. This is the equation 20+2x=y.

If Vlad did 0 math problems then he spent at least 20 minutes on homework from history. This is the constraint $y\geq 20$ .

We also know Vlad can do many math problems but the least amount he did was 0, so the second constraint is $x\geq 0$ .

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3 years ago