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3 years ago

I need help now it’s an iready

Mathematics

2 answers:

kipiarov [429]3 years ago

8 0

Answer:

Only the bottom two work.

Step-by-step explanation:

18 is 3 times 6 and 48 is 8 times 6. Both can be a solution to a number times 6. 8x3 is neither 48 or 18. 8x3 is 24, so the top two wouldn't work.

topjm [15]3 years ago

4 0

Answer:6x3+6x8

Step-by-step explanation:

First, you see A is 18 plus 48 you first do 18 sq ft you could multiply 6x3, and 6x3 is one of the options next what x what is 48 that you see of the answers and 6 x 8 is 48 so the answer is the bottom left.

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Question 2 (multiple choice)

castortr0y [4]

Your x-intercept is at (-2,0) and your y intercept at (0,-3), so it's D

4 0

3 years ago

1) Original price of a goldfish: $7.70 Discount: 30%

Leni [432]

Answer:

$5.39

Step-by-step explanation:

In order to solve for this equation, we are going to multiply 7.70 by 0.3 to find how much money was taken which was 2.31.

Subtract2.31 from 7.70 to recieve your new price :)

$7.70*0.3=2.31\\7.70-2.31=5.39$

Hope this Helps!

8 0

3 years ago

Identify an expression that is equivalent to 0.3(12y). HELP PLEASEEE

Ede4ka [16]

Answer:4.5y

Step-by-step explanation: you have to multiply 15 times 0.3 and u get 4.5y

8 0

2 years ago

What is the answer of this equation

Yakvenalex [24]

Can you post the rest of the question?

5 0

3 years ago

An article reported the following data on oxygen consumption (mL/kg/min) for a sample of ten firefighters performing a fire-supp

nasty-shy [4]

Answer:

a) Range = 25.6

b) Variance = 48.1446

c) s = 6.9386

d) See below

Step-by-step explanation:

(a) the sample range

To obtain the sample range, we must sort the data increasingly :

23.7, 26.3, 28.3, 28.7, 29.6, 29.8, 30.1, 31, 33.5, 49.3

Then, find the distance between the largest and the lowest

Range = 49.3 - 23.7 = 25.6

(b) the sample variance $s^2$ from the definition

In order to find the variance from the definition, we need first the mean. The mean is defined as the average

$\bar x=\displaystyle\frac{\displaystyle\sum_{i=1}^{n}x_i}{n}$

where the $x_i$ are the values of the data collected and n=10 the size of the sample.

So, the mean is

$\bar x=31.03$

Now, the variance of the sample is defined as

$s^2=\displaystyle\frac{\displaystyle\sum_{i=1}^n(x_i-\bar x)^2}{n-1}$

and we have that the variance is

$s^2=48.1446$

(c) the sample standard deviation

The sample standard deviation is nothing but the square root of the variance

$s=\sqrt{48.1446}=6.9386$

d) $s^2$ using the shortcut method

The shortcut method figures out the variance without having to compute the mean. The formula is

$s^2=\frac{n\sum x_i^2-(\sum x_i)^2}{n(n-1)}$

where n=10 is the sample size .

So, using the shortcut method,

$s^2=\frac{10*10,061.91-96,286.09}{10*9}=48.1446$

8 0

3 years ago