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AlekseyPX
3 years ago
9

What is 21 divide by 21​

Mathematics
2 answers:
Ivanshal [37]3 years ago
7 0

Answer:

tfg

Step-by-step explanation:

ntgggftderfty

user100 [1]3 years ago
3 0

Answer:

it is 1

Step-by-step explanation:

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Simplify (write without the absolute value sign):<br> 120+x, if x &lt;- 120
Alexeev081 [22]

Answer: - x - 120

Explanation: You want to find the opposite of (120-x) not just x, so you just put the negative symbol next to both the variables.

8 0
4 years ago
According to a recent​ poll, 25​% of adults in a certain area have high levels of cholesterol. They report that such elevated le
Readme [11.4K]

Answer:

The answer is below

Step-by-step explanation:

The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma} \\\\for\ a \ sample(n):\\\\z=\frac{x-\mu}{\sigma/\sqrt{n} }\\\\where\ x=raw\ score,\mu=mean, \sigma=standard deviation

Given that n = 49, μ = 260 mg/dL, σ = 35 mg/dL

a) For x < 210:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{210-260}{35/\sqrt{49} } =-10

From the normal distribution table, P(x < 210) = P(z < -10) = 0.0001

b) For x > 205:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{205-260}{35/\sqrt{49} } =-11

For x < 215:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{215-260}{35/\sqrt{49} } =-9

P(205 < x < 215) = P(-11 < z < -9) = P(z < -9) - P(z < -11) = 0.0001 - 0.00001 = 0.00009

c) For x < 200:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{200-260}{35/\sqrt{49} } =-12

From the normal distribution table, P(x < 200) = P(z < -12) = 0.00001

d) For x > 222:

z=\frac{x-\mu}{\sigma/\sqrt{n} } =\frac{222-260}{35/\sqrt{49} } =-7.6

From the normal distribution table, P(x > 200) = 1 - P(z < -12) = 1 - 0.0001 = 0.9999

7 0
3 years ago
12x-9y=36<br> X-intercept is<br> Y- intercept is
n200080 [17]

Answer:

x-int is 3

y-int is -4

Step-by-step explanation:

when x is zero, -9y = 36

y = -4

when y = zero 12x = 36

x = 3

7 0
3 years ago
Compare partial products and regrouping. describe how the methods are alike and different
svetlana [45]
<span><em>Partial product </em>multiplication is the process of multiplying the numbers partially (respectively to ones, tens and hundreds) and adding them together in the end. For example, in order to find the product of 3 8 × 6 we should write that,
1) 3 8
   × 6
  ___
  4 8

2)  3 8
    ×  6
 _____
     4 8
   1 8 0

3) 3 8
    × 6
______
+  4 8
  1 8 0
 ______
 2 2 8

<em>Regrouping </em>is the multiplication process when we add the partial products to the next tens and hundreds and so on without writing them down. For example, in order to find the product of 3 8 × 6 with the help of regrouping, we write that
   4
3 8
× 6
___
228
, where the number 4 above 8 shows the tens of 4 (40), which is going to be added to the tens of the product of 30 times 6. The two processes are the same in a way that you are getting the same result. In the end, it is a multiplication process. The processes differ because of the methods we apply. In partial product multiplication, we break down the number in its ones, tens, hundreds steps and then calculate. However, in regrouping process we consider those steps without breaking them down. </span>
3 0
3 years ago
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Please help! I can't figure out the rule :(
anastassius [24]

Answer:

y = 2x...

Step-by-step explanation:

4 0
3 years ago
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