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balandron [24]
3 years ago
15

Expand the expression 4(y+z)

Mathematics
1 answer:
Ilia_Sergeevich [38]3 years ago
5 0

Answer: 4y+4z

Step-by-step explanation:

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-8 ( r + 6 ) = 7 ( r + 6 ) <br> solve the equation
tangare [24]


r=-6  

You have to use distributive property and multiply parentheses

5 0
3 years ago
A person gets on and off a bathroom scale four times. The four readings (in pounds) are 148, 151, 150, and 152. Each time after
Ganezh [65]

Answer:

See explanation below

Step-by-step explanation:

Since each time after the person gets off the scale, the reading is 2 lb the person's weight must be near the mean of

148-2, 151-2, 150-2, 152-2; that is to say, near the mean of 146, 149, 148, 150 = (146+149+148+150)/4 = 148.25

We could estimate the uncertainty as <em>the standard error SE </em>

\bf SE=\frac{s}{\sqrt{n}}  

where  

<em>s = standard deviation of the sample </em>

<em>n = 4 sample size. </em>

Computing s:

\bf s=\sqrt{\frac{(146-148.25)^2+(149-148.25)^2+(148-148.25)^2+(150-148.25)^2}{4}}=1.479

So, the uncertainty is 1.479/2 = 0.736

<em>It is not possible to estimate the bias, since it is the difference between the true weight and the mean, but we do not know the true weight. </em>

5 0
3 years ago
Helppppppppppppp only 12 minutes left
rusak2 [61]

Answer:

2/6

Step-by-step explanation:

the circle is devided into 3 pieces and one piece is taken , so if u multiply 1/3 by 2 it equals to 2/6

6 0
3 years ago
Find the volume of the cylinder in terms of pi
jeyben [28]
The answer is 127.16 pi m³, hope this helps.
6 0
3 years ago
What is a - 5 - 6a + 3
Yakvenalex [24]

Answer:

-7-5a

Step-by-step

i simplified it if thats what it meant

4 0
3 years ago
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