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Mrac [35]
3 years ago
7

I don’t understand please all correct answers

Mathematics
1 answer:
N76 [4]3 years ago
5 0

Answer:

see below

Step-by-step explanation:

1) 2 / 3

2) 3 / 5

3) 5 / 2

4) 3

5) 5

6) 3 + 2 = 5

7) 15

8) 3 x 5 = 15 golden

   2 x 5 = 10 dwarf

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The resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. U
Liono4ka [1.6K]

Answer:

84%

Step-by-step explanation:

The empirical rule states that 68% values are within 1 standard deviation of mean, i.e,

70

±

15

or from 55 to 85. Since normal distribution is symmetric, we must have (32%) outside this range, and 32/2=16% on the right if this range. Hence below 85 we have (100-16) % = 84%

7 0
2 years ago
The polynomial is a difference of perfect squares. Use the formula a2 – b2 = (a + b)(a – b) to factor completely. 81x2 – 49 The
borishaifa [10]
To answer your question: Rewrite <span>81<span>x2</span></span> as <span><span>(<span>9x</span>)</span>2</span>.<span><span><span>(<span>9x</span>)</span>2</span><span>−49</span></span>Rewrite 49 as <span>72</span>.<span><span><span>(<span>9x</span>)</span>2</span><span>−<span>72</span></span></span> Both terms are perfect squares, factor using the difference of squares formula, <span><span><span>a2</span><span>−<span>b2</span></span></span>=<span><span>(<span>a+b</span>)</span><span>(<span>a<span>−b</span></span>)</span></span></span> where <span>a=<span>9x</span></span> and <span>b=7</span>.<span><span>(<span><span>9x</span>+7</span>)</span><span>(<span><span>9x</span><span>−7</span></span><span>)</span></span></span>
3 0
3 years ago
Read 2 more answers
pls help!!! this is due in 5 minutes. (pls don’t provide a link, i’ll give brainiest if u don’t just pls help me!!!)
LenaWriter [7]

Answer:

B

Step-by-step explanation:

They help support the tree in shallow soil so it does not fall over

7 0
2 years ago
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(30 points!) Which equation of the least squares regression line most closely matches the data set?
snow_tiger [21]
4. it makes the most sense to me.

3 0
3 years ago
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GIVING AWAY 10 POINTS!!!!!! What is the solution to the system of equations? x = y + 4
slega [8]

Answer:

x= -6, y= 10

Step-by-step explanation:

x= y + 4

2x = 3y - 2

If we replace "x" with "y+4" in the second equation we get:

2(y+4) = 3y - 2

2y + 8 = 3y - 2

2y - 3y = -2-8

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y = 10

Now we can go back to the first equation and solve for x:

x = y + 4

x = 10 + 4 = 14

8 0
3 years ago
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