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disa [49]
3 years ago
14

Which inequality has no solution?

Mathematics
2 answers:
stepladder [879]3 years ago
8 0

Answer:

Second option: 3 + 4 x\leq 2 (1 + 2x)

Step-by-step explanation:

Let's solve for "x" from each inequality:

a.\ 6 (x + 2)>x-3\\\\6x+12>x-3\\\\6x-x>-3-12\\\\5x>-15\\\\x>\frac{-15}{5}\\\\x>-3

b.\ 3 + 4 x\leq 2 (1 + 2x)\\\\3+4x\leq 2+4x\\\\3-2\leq 4x-4x\\\\1\leq 0\  (FALSE.\ IT\ HAS\ NO\ SOLUTION)

c.\ -2 (x + 6)

d.\ x-9

jarptica [38.1K]3 years ago
8 0

Answer:

second choice

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Find the following sums ( for letter C)
anygoal [31]

Each number in the sum is even, so we can remove a factor of 2.

2 + 4 + 6 + 8 + ... + 78 + 80 = 2 (1 + 2 + 3 + 4 + ... + 39 + 40)

Use whatever technique you used in (a) and (b) to compute the sum

1 + 2 + 3 + 4 + ... + 39 + 40

With Gauss's method, for instance, we have

S = 1 + 2 + 3 + ... + 38 + 39 + 40

S = 40 + 39 + 38 + ... + 3 + 2 + 1

2S = (1 + 40) + (2 + 39) + ... + (39 + 2) + (40 + 1) = 40×41

S = 20×21 = 420

Then the sum you want is 2×420 = 840.

6 0
1 year ago
Using the quadratic formula to solve 7x2 -x = 7, what are the values of x?
Sunny_sXe [5.5K]

Answer:

x=-7

Step-by-step explanation:

7x2-x=7

7x2=14.

14-x=7

When you finished the last step, you will subtract 14 to both sides.

14-x=7

14-14-x=7-14

this will cancel out the 14 on the left.

And will leave you with:

-x=7-14

7-14 is -7.

and this will get you to

-x=-7

To finish this off, you have to turn the negative x/variable, into a positive x/variable.

So, you will divide both sides of the equation by the same term.

-x = -7

into

\frac{-x}{1} =\frac{-7}{1}

and it will be -7.

I hope this helps      :)

8 0
3 years ago
The distance around our schools playing field is 300 meters. if our coach wants us to run 3 kilometers how many times will we ne
galina1969 [7]
3 kilometers is equal to 3000 meters
Distance of a ground is 300 meters sou need to  run 10 rounds around thefield
8 0
3 years ago
Forty-two divided by seven plus the quantity three divided by six
ikadub [295]

Answer:

i think its 6.5

Step-by-step explanation:

42/7 = 6

3/6 = 0.5

6+0.5=6.5

6 0
3 years ago
3. What is the radius, in centimeters, of a circle that has a circumference of 16 centimeters? ​
ludmilkaskok [199]
Answer: 8cm I think-
3 0
2 years ago
Read 2 more answers
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