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3 years ago

Drag and drop the symbol that correctly represents this graph.

Mathematics

2 answers:

lisov135 [29]3 years ago

6 0

A closed dot mean "greater than or equal to" or "less than or equal to"

An open dot means "less than" or "greater than"

In this case, an open dot would mean

X>-2

Lapatulllka [165]3 years ago

5 0

.........................

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Ricky, Sam, and Timothy cycles from Airy Town to Brightvale which was 9km apart. Ricky cycles at a constant x km/h. Sam cycled a

Semmy [17]

12.15 km /h

Step-by-step explanation:

Step 1 :

Given

Distance between Airy Town to Brightvale = 9 km

Speed of Ricky = x km/h

Step 2:

Speed taken by Sam = x + y km/h

Time taken by Sam = 40 min = 40/60 hrs = 2/3 hrs

so we have (x+y) 2/3 = 9

Step 3:

Speed taken by Timothy = x - y km / h

Time taken by Timothy = 50 min = 50/60 = 5/6 hrs

= > (x-y) 5/6 = 9

Step 4 :

Solving the 2 equations

(x+y) 2/3 = 9 and (x-y) 5/6 = 9 we have

(2/3)x + 2/3(y) = 9 = > 2x + 2 y = 27

5/6(x) - 5/6(y) = 9 = > 5 x - 5 y = 54

Multiplying the first equation by 5 and the second by 2 we have ,

10 x + 10 y = 135 and 10 x - 10y = 108

Adding both,

20 x = 243 => x = 12.15.

This gives speed of Ricky as 12.15 km /h

3 0

3 years ago

T^3-9t^2+15t use the equation to find t

andreev551 [17]

Answer:

DONT CARE I WISH u GET FAILED

MNMCZ JHJFSDFHDGFJCXBH

4 0

3 years ago

7 x 7 x 7 x 7 in exponential form?

pogonyaev

7x7x7x7 written in exponential form would be 7^4 or 7 to the fourth power.
hope this helps .

8 0

3 years ago

Read 2 more answers

9. Si Diana compro una botella de aguardente, una de vino y una de wisky, todas por $260.000 botella de wisky costo el doble que

VLD [36.1K]

The answer is D.32.000

7 0

3 years ago

In a reliability test there is a 42% probability that a computer chip survives more than 500 temperature cycles. If a computer c

Strike441 [17]

Answer:

The probability is $P(B' n A ' ) =$ 16%

Step-by-step explanation:

From the question we are told that

A is the event that the chip was "made by company A"

B is the event that a chip "survives 500 temperature cycles"

The probability that a computer chip survives more than 500 temperature cycles is

$P(B) = 42$ % $= 0.42$

The probability that does not survive more than 500 temperature cycles and it was manufactured by company A is $P(A | B' ) = 0.73$

The probability that the computer chip is not manufactured by company A and does not survive more than 500 temperature cycles is mathematically evaluated as

$P(B' n A ' ) = P (B' | A' ) P(B ')$

Where $B' \ and \ A'$ are a A and B complements and | represented AND operator

$P(B' n A ' ) = [1 - P (B' | A )] [1 - P(B )]$

substituting values

$P(B' n A ' ) = [1 - 0.73] [1 - 0.42 ]$

$P(B' n A ' ) = (0.27 )(0.58)$

$P(B' n A ' ) =0.16$

$P(B' n A ' ) =$ 16%

7 0

3 years ago