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3 years ago

H e l p Me P l e a s e

Mathematics

2 answers:

murzikaleks [220]3 years ago

7 0

Answer:

The experimental is 3/20,cause the red sector was picked 3 times in 20 trials.

Step-by-step explanation:

krok68 [10]3 years ago

5 0

The theorical probability is 1/4, because there are 4 possible outcome, and they are equally likely to be picked (the sectors have the same area)

The experimental probability is 3/20, becuase the red sector was picked 3 times in 20 trials.

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Evaluate 5a+3 4b when a = b - 4and b = -2.

Svetlanka [38]

The answer is in the photo, sorry if it isn’t correct

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3 years ago

I need help with this question

Bad White [126]

(4/3)x=28/3
x=(28/3)divides by 4/3
x= (28/3)*3/4
x= 28/4
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3 years ago

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Levart [38]

Answer:

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2 years ago

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pshichka [43]

Answer:

Step-by-step explanation:

A perpendicular bisector, intersects a line at its mid point and is perpendicular to it.

Calculate slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (- 7, 1) and (x₂, y₂ ) = (9, 13)

m = $\frac{13-1}{9-(-7)}$ = $\frac{12}{9+7}$ = $\frac{12}{16}$ = $\frac{3}{4}$

Given a line with slope m then the slope of a line perpendicular to it is

$m_{perpendicular}$ = - $\frac{1}{m}$ = - $\frac{1}{\frac{3}{4} }$ = - $\frac{4}{3}$ ← slope of perpendicular bisector

Given endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint is

( $\frac{x_{1}+x_{2} }{2}$ , $\frac{y_{1}+y_{2} }{2}$ )

using (x₁, y₁ ) = (- 7, 1) and (x₂, y₂ ) = (9, 13) , then

midpoint = ( $\frac{-7+9}{2}$ , $\frac{1+13}{2}$ ) = ( $\frac{2}{2}$ , $\frac{14}{2}$ ) = (1, 7 )

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = - $\frac{4}{3}$ , then

y = - $\frac{4}{3}$ x + c ← is the partial equation

To find c substitute the midpoint (1, 7) into the partial equation

7 = - $\frac{4}{3}$ + c ⇒ c = $\frac{21}{3}$ + $\frac{4}{3}$ = $\frac{25}{3}$

y = - $\frac{4}{3}$ x + $\frac{25}{3}$ ← equation of perpendicular bisector

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3 years ago

Tom had 240$ to buy drinks and sandwiches for his class party. He bought 22 boxes of drinks at 4$ per box. He spent the rest of

m_a_m_a [10]

In the given question, there are several information's of immense importance. using these given information's the required answer can be easily deduced. It has already been given that Tom has a total amount of $240. He bought 22 boxes of drinks at $4 per box. rest he spent on buying the 8 boxes of sandwiches.
A. The amount of money the drinks cost in total = (22 * 4) dollars
   = 88 dollars
So Tom spent $88 on the drinks
B. Now we have to first find the amount spent by Tom on the box of sandwiches.
Total amount spent by Tom on sandwiches = (240 - 88) dollars
   = 152 dollars
Then the amount of money spent by Tom for buying 1 box of sandwich = (152/8) dollars
   = 19 dollars
So Tom had to pay $19 for buying a single box of sandwich.

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3 years ago

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