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zubka84 [21]
3 years ago
6

May someone please help me?

Mathematics
1 answer:
Irina-Kira [14]3 years ago
6 0
What's the question Love? I can't help til i know the question =/

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What is the volume of the cone with diameter 7in and height 9in? Round to the nearest cubic inch
dezoksy [38]
Diameter = 7 cm
radius = 7÷2 = 3.5
Volume of cone = 1/3 \pi  r^{2} h
Volume of cone = 1/3 \pi 3.5^{2} (9) = 115 cubic inches (Answer B)
8 0
3 years ago
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Sherry thinks 7, 7 and 12 are side lengths of a right triangle. Do you agree or disagree? Justify your reasoning. PLEASE NOW!!!!
AleksAgata [21]

Answer:

disagree

Step-by-step explanation:

If the triangle is right, then the square of the longest side must equal the sum of the squares on the other 2 sides.

longest side = 12 ⇒ 12² = 144

7² + 7² = 49 + 49 = 98

Since 144 ≠ 98 then triangle is not right

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3 years ago
NEED HELP!!<br> What does x equal too?<br> 8x - 5x + 155 = 8x + 80
AlexFokin [52]

Answer:   X = 15

Step-by-step explanation:

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Answer: 1.C 2.B 3.C

Step-by-step explanation:

5 0
3 years ago
This is factoring trinomials,help plz!
MaRussiya [10]
10.
Factor the following:
8 x^2 - 2 x - 10
Factor 2 out of 8 x^2 - 2 x - 10:
2 (4 x^2 - x - 5)

Factor the quadratic 4 x^2 - x - 5. The coefficient of x^2 is 4 and the constant term is -5. The product of 4 and -5 is -20. The factors of -20 which sum to -1 are 4 and -5. So 4 x^2 - x - 5 = 4 x^2 - 5 x + 4 x - 5 = 4 x (x + 1) - 5 (x + 1):
2 4 x (x + 1) - 5 (x + 1)
Factor x + 1 from 4 x (x + 1) - 5 (x + 1):
Answer:  2 (x + 1) (4 x - 5)
_____________________________________________

13. 
Factor the following:
16 x^2 - 24 x + 8

Factor 8 out of 16 x^2 - 24 x + 8:
8 (2 x^2 - 3 x + 1)

Factor the quadratic 2 x^2 - 3 x + 1. The coefficient of x^2 is 2 and the constant term is 1. The product of 2 and 1 is 2. The factors of 2 which sum to -3 are -1 and -2. So 2 x^2 - 3 x + 1 = 2 x^2 - 2 x - x + 1 = -(2 x - 1) + x (2 x - 1):
8 x (2 x - 1) - (2 x - 1)

Factor 2 x - 1 from x (2 x - 1) - (2 x - 1):
Answer: 8 (2 x - 1) (x - 1)
8 0
3 years ago
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