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3 years ago

HELP ILL GIVE BRAINLIEST PLSSS IM BEGGINg!!!

Mathematics

2 answers:

Tasya [4]3 years ago

7 0

Answer:

37.5

Step-by-step explanation:

You would do 25 divided by two in order to find out what the distant in one inch is. 25 divided by two is 12.5. Then, you do 12.5 multiplied by 3.

ryzh [129]3 years ago

5 0

Answer:

39 miles for question 3

Step-by-step explanation:

4 inches = 12 miles

1 inch = 12 ÷ 4 = 3 miles

13 inches = 13 x 3

13 inches = 39 miles

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At a school, 174 students play at least one sport. This is 75% of the students at the school. How many students are at the sc

boyakko [2]

Answer:

There are 232 students at the school.

Step-by-step explanation:

Let s represent the number of students at the school. We are told ...

174 = 75% × s

174/0.75 = s = 232 . . . . . divide by the coefficient of s

There are 232 students at the school.

3 0

3 years ago

A polynomial function can be written as (x 1)(x 4)(x − 7). what are the x-intercepts of the graph of this function? (1, 0), (4,

IrinaVladis [17]

Easy

set to zero
those are the roots or xintersepts

(x+1)(x+4)(x-7)=0

x+1=0
x=-1

x+4=0
x=-4

x-7=0
x=7

xints are (-4,0) (-1,0) (7,0)

5 0

3 years ago

Read 2 more answers

What is the answer in substiution y=2x-9 and y=3

ale4655 [162]

Answer:

x= -6

Step-by-step explanation:

7 0

1 year ago

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A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the followin

maks197457 [2]

Answer:

(a) $\sum x_i=56.68$ and $\sum x_i^2=197.46$

(b) The sample variance is $s^2=0.530$ and the sample standard deviation is $s=0.728$

Step-by-step explanation:

(a)

The sum of these 17 sample observations is

$\sum x_i=2.79\:+2.57+\:2.73\:+3.75\:+2.27+\:2.75+\:4.00+\:4.22+\:3.88+\:4.35+\:3.41+\:4.57+\:2.38+\:3.73\:+2.75+\:3.47+\:3.06\\\\\sum x_i=56.68$

and the sum of their squares is

$\sum x_i^2=2.79^2\:+2.57^2+\:2.73^2\:+3.75^2\:+2.27^2+\:2.75^2+\:4.00^2+\:4.22^2+\:3.88^2+\:4.35^2+\:3.41^2+\:4.57^2+\:2.38^2+\:3.73^2\:+2.75^2+\:3.47^2+\:3.06^2\\\\\sum x_i^2=197.46$

(b)

The sample variance, denoted by $s^2$ , is given by

$s^2=\frac{S_{xx}}{n-1}$

where $S_{xx} =\sum x_i^2-\frac{(\sum x_i)^2}{n}$

Applying the above formula we get that

$S_{xx}=197.46-\frac{(56.68)^2}{17}\\\\S_{xx} =8.482$

$s^2=\frac{8.482}{17-1}=0.530$

The sample standard deviation, denoted by <em>s</em>, is the (positive) square root of the variance:

$s=\sqrt{s^2}$

Applying the above formula we get that

$s=\sqrt{0.530}=0.728$

3 0

3 years ago

Is this table linear or nonlinear?

olchik [2.2K]

Answer:

Linear (❁´◡`❁)

Step-by-step explanation:

4 0

3 years ago

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