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frez [133]
3 years ago
12

Which is the length of HJ expressed in terms of pi?

Mathematics
1 answer:
Pani-rosa [81]3 years ago
4 0

Answer:

B. 9/20\pi

Step-by-step explanation:

the circumference is 2\pir. Since the radius is one, that would be 2\pi.

81/360=0.225, or 22.5% of the circumference.  22.5% of 2\pi is 0.45\pi.  0.45=9/20, so the answer is B.

CHECK: 2\pi = 6.283

6.283x0.225=0.14137, or 9/20\pi

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Pls answer this yall<br> 2a-1+8b-12b+7a-12
Leto [7]
2a+7a+8b-12b-12-1 9a-4b-13
8 0
3 years ago
Jack earned $972 in 6 years on an investment at a 3% annual simple interest rate. How much was Jack’s investment?
Tanya [424]

Answer:

the answer would be $5400

Step-by-step explanation:

5400 times .03 = 162, 162 times 6=972

8 0
4 years ago
Which of the quadratic functions has the narrowest graph?
Nuetrik [128]
<h3>Answer: Choice A) y = -10x^2</h3>

Explanation:

The equation y = ax^2+bx+c has the value of 'a' determine how wide or narrow the graph is. The closer 'a' is to zero, then the wider it gets; while the further 'a' is from 0, the narrower it gets.

What we need to do is look for equations in which the 'a' value is furthest from 0. In this case, it's with y = -10x^2 since a = -10 is furthest from zero compared to a = -0.9 and a = 9. Set up a number line to help see this. You can also use absolute values to get the job as well.

Therefore, y = -10x^2 has the most narrowest graph.

3 0
3 years ago
Help me with all three problems! This is due tommorow
nalin [4]
11) x-intercept: 12
y-intercept: 8

12) x-intercept: -18
y-intercept:-16

13) x-intercept: 6
y-intercept:10

Sorry I can't graph it for you but here are the equations in the slope-intercept form

11)y=-2/3x+8
12)y=-8/9x-16
13)y=-5/3x+10
3 0
3 years ago
What is the solution to 2x^2 + X - 1 = 2
Maru [420]

Answer: x = square root of -x + 3 / 2

Step-by-step explanation:

2x^2 + x - 1 = 2

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subtract x from both sides

2x^2 = -x + 3

square root both sides

2x = square root of -x + 3

divide by 2

x = square root of -x + 3 / 2

8 0
3 years ago
Read 2 more answers
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