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Semmy [17]
3 years ago
11

Find the product and simplify. (k+ 4)(-4k – 5)

Mathematics
1 answer:
torisob [31]3 years ago
3 0
The answer is -4k^2 - 21k - 20! so sorry if I’m wrong but it’s the answer I got :>
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Write the following precent as a decimal 1/8%
Serggg [28]

Answer:

.125

Step-by-step explanation: To convert 1/8 to a decimal, divide the denominator into the numerator. 1 divided by 8 = . 125. To convert the decimal .

7 0
3 years ago
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Find the value of y for which line a is parallel to line b.
alexdok [17]
Y+38°= 180 beacuse if a and b are parallel they are co interior angles. This means that they will at to 180.

y=180-38= 142°

Answer: 142°

Drew out some hopefully helpful pictures below. Hope they help! let me know if you still have any questions!

6 0
3 years ago
1,2,3
Darya [45]
1. scalene
2. rectangle or parallelogram
3. right triangle
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3 years ago
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PLS HELP 30 POINTS URGENT!!!!!!!
Fudgin [204]

Answer:

40x = 1800 +25x

Step-by-step explanation:

3 0
3 years ago
MAJOR HELP!
Feliz [49]

Answer:

The radius of the cone is 21 units

The volume of the cone is 9702 units³

Step-by-step explanation:

* Lets revise the area of the circle and the volume of the cone

- The base if the cone is a circle

- The area of the circle is πr², where r is the radius of the circle

∵ The area of the base of the cone = 1386 units²

∵ The area of the base = πr²

∵ π = 22/7

∴ 1386 = 22/7 (r²) ⇒ multiply each side by 7

∴ 9702 = 22 r² ⇒ divide both sides by 22

∴ 441 = r² ⇒ take √ for both sides

∴ 21 = r

* The radius of the cone is 21 units

- The volume of the cone = 1/3 πr²h , where h is the height of the cone

∵ The cone's height is equal to the radius of its base

∴ h = r

∵ The volume of the cone = 1/3 πr²h

∴ The volume of the cone = 1/3 πr²(r) = 1/3 πr³

∵ r = 21 units

∴ The volume of the cone = 1/3 (22/7) (21)³

∴ The volume of the cone = 9702 unit³

* The volume of the cone is 9702 units³

3 0
4 years ago
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