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leva [86]
4 years ago
5

What is the solution to the compound inequality 5x + 7 ≤ −8 or 3x + 7 > 19?

Mathematics
1 answer:
Korvikt [17]4 years ago
8 0

5x + 7 ≤ −8                        or                     3x + 7 > 19

5x  ≤ - 15                            or                          3x > 12

 x ≤ - 3                              or                             x > 4

Answer

 x ≤ - 3    or   x > 4

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Please help me its urgent ​
Naya [18.7K]

Answer:

A. -0.5

B. 0.75

C. -1.75

Step-by-step explanation:

The number line is going by a scale of 0.25

8 0
3 years ago
An oil refinery is located 1 km north of the north bank of a straight river that is 2 km wide. A pipeline is to be constructed f
djyliett [7]

Answer:

  7.86 km

Step-by-step explanation:

Let x represent the distance point P lies east of the refinery. (We assume this direction is downriver from the refinery.)

The cost of laying pipe to P from the refinery (in millions of $) will be ...

  0.5√(1² +x²)

The cost of laying pipe under the river from P to the storage facility will be ...

  1.0√(2² +(9-x)²) = √(85 -18x +x²)

We want to minimize the total cost c. That total cost is ...

  c = 0.5√(x² +1) +√(x² -18x +85)

The minimum value is best found using technology. (Differentiating c with respect to x results in a messy radical equation that has no algebraic solution.) A graphing calculator shows it to be at about x ≈ 7.86 km.

Point P should be located about 7.86 km downriver from the refinery.

8 0
4 years ago
1/3 divided by 2/5 help me plss
stepladder [879]

Answer:

5/6

Step-by-step explanation:

dividing means you gotta flip it to multiplication.

1 times 5 = 5

3 times 2 = 6

6 0
3 years ago
A person invest 7500 dollars in a bank. The bank pays 6 interest compounded semi-annually. To the nearest tenth of a year,how lo
Kamila [148]

Answer:

Step-by-step explanation:

I clicked see solution

T=5 years

6 0
3 years ago
ava walks to the end of her section of trail and back in 90 minutes Luis walks his his section of the trail in 1 3/4 hours. Who
AlekseyPX

Answer:

Luis

Step-by-step explanation:

One hour is 60 minutes total, leaving and extra 30 minutes for Ava, which is half of 60. So, in fraction form, she walked 1 1/2 OR 1 2/4 hours, which is less than Luis. He walked about an hour and 45 minutes total, or 105 minutes.

6 0
3 years ago
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