Ask question

Ask question

All categories

4 years ago

13

Erica used friendly numbers to find 43-19 she added 1 to 19 and subtracted 1 from 43 what is Erica's error

1 answer:

chubhunter [2.5K]4 years ago

8 0

42-20=22 thats the answer i belive u were looking for.

You might be interested in

What is the absolute deviation of 12?

Minchanka [31]

The mean absolute deviation of a set of data is the average distance between each data value and the mean. The mean number of contacts stored and the distance each data value is from the mean is shown below. Each data value is represented by an ×. So, the mean absolute deviation is 3.75<span>.

</span>

3 0

3 years ago

Read 2 more answers

The distribution of total body protein in healthy adult men is approximately Normal with mean 12.3 kg and standard deviation 0.1

Gelneren [198K]

Answer: a. 0.9876

Step-by-step explanation:

Given : The distribution of total body protein in healthy adult men is approximately Normal with mean 12.3 kg and standard deviation 0.1 kg.

$\mu=12.3$ and $\sigma=0.1$

sample size : n= 25

Let x denotes the total body protein in healthy adult men in the sample.

Then, the probability that their average total body protein is between 12.25 and 12.35 kg will be :-

$P(12.25$

∴ The correct answer is a. 0.9876

4 0

3 years ago

The vertex of a parabola is (3,-2) and another point on the parabola is (2,3) find the equation of the parabola in vertex form

jonny [76]

Answer:

$y = 5 ( x - 3 ) ^2 -2$

OR

$y+2= 5 ( x - 3 ) ^2$

Step-by-step explanation:

Vertex form of a parabola is given as:

$y = a ( x - h ) ^2 + k$

Where ( $h,k$ ) is the vertex and $(x,y)$ are the points on the parabola.

We are given that, the vertex is (3, -2) and another point on parabola is given as (2, 3).

$h = 3,k = -2$

First of all, putting the vertex in the vertex equation as given above:

$y = a ( x - 3 ) ^2 + (-2)$

Now, putting the values of $x, y$ as 2, 3 and let us find the unknown variable $a$ :

$3 = a ( 2 - 3 ) ^2 + (-2)\\\Rightarrow 3 = a -2\\\Rightarrow a = 5$

Therefore, the equation in vertex form can be written as:

$y = 5 ( x - 3 ) ^2 -2$

OR

$y+2= 5 ( x - 3 ) ^2$

4 0

3 years ago

Nevaeh has 12 gallons of gas in her car at the beginning of a trip. Every hour Nevaeh

slega [8]

Answer:

there is no question below therefore, we can't answer it

8 0

4 years ago

Write the coordinates of the vertices after a reflection across the line y = 4

Lubov Fominskaja [6]

A'(-9,4)
B'(-4,4)
C'(0,-4)
D'(-5,-4)

8 0

3 years ago