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RideAnS [48]
3 years ago
7

Solve the inequality 7(x + 4) > 0. x < -4 x > -4 x < 4 x > 4

Mathematics
2 answers:
spayn [35]3 years ago
7 0
7(x+4)>0

Distribute 7. (multiply by x and 4)

7x+28>0

Subtract 28 on both sides.

7x>-28

Divide by 7 into both sides.

x>-4

x>-4 is the answer. 

I hope this helps! 
~kaikers
MaRussiya [10]3 years ago
4 0

Answer:

x>-4

Step-by-step explanation:

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Please help me with a i don’t understand what it’s asking
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Answer:

(-3,6)

Step-by-step explanation:

y = 1/3 x +7

y = -2x

The question is asking you to find a value for x that would satisfy both equations.

Since y is equal to y ( y=y) you can set both of these equations equal to each other. You would get:

-2x = 1/3 x +7

now you can do some algebra to isolate the x on one side solving for it, this gives you:

-2x - 1/3 x = 7....... -6/3 x - 1/3 x = 7 ...... -7/3 x = 7 ...... -7x = 21 ..... x = -3

Now you have x = -3, and if you plug this into an equation , lets say the second one since it's easier to solve you get:

y = -2(-3) .... y=6

This means when you graph these two equations they should intersect at the point (-3,6)

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3 years ago
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What was the net change in the elevation of the ocean's surface from 1 p.m. to 7p.m.?​
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Answer:

4.6

Step-by-step explanation:

The net change is found by subtracting the starting number from the change. 2.2 minus -2.4 is 4.6. If this is wrong I apologise.

8 0
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Steve flipped a coin 10 times and recorded his results in this chart.
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<em><u>- 2  \leqslant  \times  \leqslant 2</u></em>

3 0
3 years ago
Find the area of each regular polygon below. Round values to the nearest 0.01. Show work for all steps clearly.
german

The area of the hexagon and pentagon area 779.4cm^2 and 84.303cm^2 respectively.

Data;

  • apothem = 15

<h3>Area of a Hexagon</h3>

The area of a hexagon with apothem 15 can be calculated by first finding the length of the side of the hexagon.

Length of hexagon can be found using trigonometric ratio;

a = x\sqrt{3}

Making x the subject of formula

x = \frac{a}{\sqrt{3} }\\x = \frac{15}{\sqrt{3} }\\x = 8.660

And then the length of the side is 2x

s = 2 * 8660 = 17.32

The perimeter of the hexagon is;

p = 6s \\p = 6 * 17.32=103.92

And the area is given as

A = \frac{1}{2} * perimeter * apothem\\A = \frac{1}{2} * 103.92 * 15\\A = 779.4unit^2

The area of the hexagon is 779.4 squared unit.

<h3>Area of the pentagon</h3>

The area of the pentagon can be found using several methods, but we can simply find the angle between the sides if we divide the pentagon into 10 pieces and then substitute the formula.

Total area of a pentagon is 360 degree.

\theta = \frac{360}{10} = 36^0\\

The area of a pentagon is given as

A = \frac{5s^2}{4 tan \theta} \\A = \frac{5 * 7^2}{4* tan36} \\A = 84.303cm^2

The area of the pentagon is 84.303cm^2

From the calculations above, the area of the hexagon and pentagon area 779.4cm^2 and 84.303cm^2 respectively

Learn more on area of polygons here;

brainly.com/question/1592439

4 0
3 years ago
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