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tensa zangetsu [6.8K]
2 years ago
12

Find k such that the roots of the quadratic are real, rational, and equal: 9x^2+kx+1=0

Mathematics
1 answer:
Georgia [21]2 years ago
4 0

Answer:

Step-by-step explanation:

9x^2+kx+1=0

k= -9x-1/x

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Subtract using a number line -4 - (8)
Mashcka [7]

Answer:

Look at the number line.

Step-by-step explanation:

Step 1: Draw a number line.

Step 2: Mark -4 on the number line.

Step 3: Here we have to subtract 8, therefore, from -4 move 8 units left, we end up at -12.

That is the answer. Here is the picture.

Hope this will help you.

Thank you.

8 0
3 years ago
Water flows at a rate of 8000 cubic inches per minute into a cylindrical tank. The tank has a diameter of 128 inches and a heigh
beks73 [17]

Answer:

The height of the water = 6.2 in. to the nearest tenth

Step-by-step explanation:

∵ The rate of flows of water into the tank = 8000 in.³/min.

∴ The volume of the water in the tank after 10 min. = 8000 × 10 = 80000 in.³

∵ The water take the shape of the tank

∴ The height of the water = volume of water ÷ Area of the base of the tank

∵ The tank is cylinder with diameter 128 in. and height 72 in.

∴ The area of the base of the tank = π(128/2)²

∴ The height of the water = \frac{80000}{\pi(64)^{2}}=6.2169899

∴ The height of the water = 6.2 in. to the nearest tenth

 

5 0
3 years ago
What is the value of the expression 3y-4xy^2 when x=3 and y=-6
Rama09 [41]
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8 0
3 years ago
PLEASE HURRY!
Gnoma [55]

Answer:

11

26

44

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
a bastetball is passed through the air. The height h of the ball in feet after the distance d in feet the ball travels horizonta
Ksenya-84 [330]
You want the (positive) distance when the height is 0, 0= -d^2 + 10d +5. You would factor that out(You'd get radicals), and the final answer would be <span>5±<span>30<span>−−</span>√</span></span><span> You'd take the only positive one of the two, 5 + srt(30) I hope I did that right :/</span>
3 0
3 years ago
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