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IrinaVladis [17]
3 years ago
14

The product of -2 and a number x is greater than 30 Write the word sentence as a inequality, then solve inequality, thank you!

Mathematics
1 answer:
anygoal [31]3 years ago
7 0
-2x > 30 

x > -15 (??)
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Please help me and thanks
vichka [17]

Answer:

x=34

Step-by-step explanation:

90-22=68

68÷2=34

8 0
2 years ago
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Angle is inscribed in circle O.<br> AB is a diameter of circle O.<br> What is the measure of B?
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3 years ago
A notebook has a perimeter of 36 inches and an area of 80 square inches. What are the dimensions of the notebook?
maw [93]
Let L be length and W be width
The perimeter of a rectangle is 2W+2L=36
Thus 2W=36-2L, W=18-L
Area of a rectangle is WL=80
Thus (18-L)(L)=80
18L-L^2=80
L^2-18L+80=0
(L-8)(L-10)
Thus L can either be 8 or 10.
Because WL=80
If L is 8, then W=10
If L is 10, then W=8
So either way, the notebook is 8 by 10
4 0
3 years ago
For the function y=-1+6 cos(2pi/7(x-5)) what is the minimum value?
Ad libitum [116K]
Usually one will differentiate the function to find the minimum/maximum point, but in this case differentiating yields:
\frac{2\pi}{7(x-5)^{2}}\sin{\frac{2\pi}{7(x-5)}}}
which contains multiple solution if one tries to solve for x when the differentiated form is 0.

I would, though, venture a guess that the minimum value would be (approaching) 5, since the function would be undefined in the vicinity.

If, however, the function is
-1+\cos{\frac{2\pi}{7}(x-5)}}
Then differentiating and equating to 0 yields:
\sin{\frac{2\pi}{7}(x-5)}}=0
which gives:
x=5 or 8.5

We reject x=5 as it is when it ix the maximum and thus,
x=8.5\pm7n, for n=0,\pm 1,\pm 2, ...
3 0
3 years ago
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after 1 year on the job M got a raise from $10.50 to $11.13 per our. What was the percent increase of her hourly wage
N76 [4]
The answer is 6% increase

6 0
3 years ago
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