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solniwko [45]
3 years ago
8

Could someone do a step-by-step? 2x < x − 4 ≤ 3x + 8

Mathematics
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

−

6

≤

x

<

−

4

Interval Notation:

[

−

6

,

−

4

)

Step-by-step explanation:

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The answer is: 28x + 8
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Find the surface area of the tool box. Round your answer to the nearest tenth and explain your answer. ​Pls I NEED THE ANSWER NO
Andrej [43]

Answer:

807.8 in^2

Step-by-step explanation:

The total area of the box is the sum of the areas of all faces of the box. The top, bottom, front, and back faces are rectangles 18 in long. The end faces each consist of a rectangle and a triangle. We can compute the sum of these like this:

The areas of top, bottom, front, and back add up to be 18 inches wide by the length that is the perimeter of the end: 2·5in +2·8 in + 9.6 in = 35.8 in. That lateral area is ...

(18 in)(35.6 in) = 640.8 in^2

The area of the triangle on each end is equivalent to the area of a rectangle half as high, so we can compute the area of each end as ...

(9.6 in)(8.7 in) = 83.52 in^2

Then the total area is the lateral area plus the area of the two ends:

640.8 in^2 + 2·83.52 in^2 = 807.84 in^2 ≈ 807.8 in^2

7 0
3 years ago
What are solutions to the equation 9x2-7x-4=0
11111nata11111 [884]

Answer:

Step-by-step explanation:

x =(7-√193)/18=-0.383

x =(7+√193)/18= 1.161

3 0
3 years ago
Justin has $500 in a savings account at the beginning of the summer. He wants to have at least $300 in the account by the end of
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Answer:

10 weeks

Step-by-step explanation:

1 because 20 times 10 is 200 and if he starts with 500 then he can withdraw 20 dollars a week for 10 weeks to have 300 left by the end of the summer, hope this helps :)

3 0
3 years ago
Suppose that a phone that originally sold for $800 loses 3/5 of its value each year after it is released.
liubo4ka [24]

Answer:

It will be worth $128.

Step-by-step explanation:

After 1 year, 3/5 of 800 is 480 which leaves the value at $320, and then after 2 years, 3/5 of 320 is 192. 320-192 leaves the value at $128.

3 0
3 years ago
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