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Ierofanga [76]
3 years ago
14

Darla has 3 times as many penciled as lucy. darla had 27 how many pencils does lucy have .

Mathematics
2 answers:
Alexxx [7]3 years ago
6 0

Answer:

9

Step-by-step explanation:

9 × 3 = 27 or 27 ÷ 3 = 9

FrozenT [24]3 years ago
5 0

Answer:

9

Step-by-step explanation:

just do 27 divided by 3

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Help Please!? Thank You!
swat32
A. left 2 units

the vertex form of a parabola is
y = a(x-h)^2 + k
(h,k) is the point of the vertex

since h is -2 in (x+2)^2
the function is shifted 2 units left
3 0
2 years ago
Find the average rate of change for fx) = x2 – 3x – 10 from x = 4 to x = 6.
Leviafan [203]

Answer:

7

Step-by-step explanation:

The rate of change is defined as

f(x2) - f(x1)

--------------------

x2-x1

x2 = 6

f(6) = x^2 – 3x – 10 = 6^2 -3*6 -10 = 36 - 18-10=8

x1 = 4

f(4) = x^2 – 3x – 10 = 4^2 -3*4 -10 = 16 - 12-10=-6

Substitute the values into the expression

8 -  -6

--------------------

6-4

8+6

------------

2

14/2= 7

6 0
3 years ago
Height, in meters, is measured for each person in a sample. After the data are collected, all the height measurements
charle [14.2K]

Answer:

(E) The z-scores of the height measurements

Step-by-step explanation:

Mean is given by

\bar {x}=\frac{1}{n}\left(\sum _{i=1}^{n}{x_{i}}\right)=\frac{x_{1}+x_{2}+\cdots +x_{n}}{n}

Where,

n = Number of people

x_{i} = The heights of people

When converting m to cm the mean would be

\bar {x}=\frac{1}{n}\left(\sum _{i=1}^{n}{x_{i}}\right)\times 100

So, the mean would change

The median gives us the middle data value when the data values are in ascending order.

So, the median would change

Standard deviation

s=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\bar{x})^2}

When converting to centimeters

s=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}\left((x_i-\bar{x})\times 100\right)^2

Hence, the standard deviation would change

When converting to centimeters the maximum height in meters would be the maximum height in centimeters also.

The z score is given by

z=\frac{x-\mu}{\sigma}

where,

x = Data point

\mu = Mean

\sigma = Standard deviation

When converting to centimeters

z=\frac{(x-\mu)\times 100}{\sigma\times 100}\\\Rightarrow z=\frac{x-\mu}{\sigma}

Hence, the z score would remain the same

5 0
3 years ago
What is the slope of the line that contains the point (-1,8) and (5,-4) answer.com?
pshichka [43]
THE SLOPE IS -2



if we have the coordinates of two points on a line, we can find the slope with this formula:
s =  \frac{y2 - y1}{x2 -x1}  =  \frac{y1 - y2}{x1 - x2}
so the slope is
\frac{8 - ( - 4)}{ - 1 - 5}  =  \frac{12}{ - 6}  =  - 2
the answer is -2



good luck
5 0
3 years ago
Look at the picture of a scaffold used to support construction workers. The height of the scaffold can be changed by adjusting t
maria [59]

<u>Part A</u>

Using the Pythagorean on the right triangle PQR, with PQ and QR as the legs and PR as the hypotenuse,

14^2 +6^2 =(PR)^2\\\\(PR)=\sqrt{14^2 +6^2}\\\\PR \approx \boxed{15.23 \text{ ft}}

<u>Part B</u>

(QR)^2 +6^2 =16^2\\\\(QR)^2 =16^2 -6^2\\\\QR=\sqrt{16^2 -6^2}\\\\QR \approx \boxed{14.83 \text{ ft}}

8 0
1 year ago
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