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3 years ago

Find the value of the combination. 5C5 A:1 B:5 C:0

Mathematics

1 answer:

Olenka [21]3 years ago

6 0

Answer:

A:1

Step by step explanations:

C(n,r)=C(5,5)

n=5

r=5

=n! / (r!(n-r)!)

=5! / (5!(5-5)!)

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AFLATI 2 NUMERE STIIND CA AL DOILEA NUMAR ESTE DE 7 ORI MAI MARE DECITPRIMUL IAR SUMA DINTRE DUBLUL PRIMULUI NUMAR SI TRIPLUL CE

postnew [5]

Answer:

The numbers are 20 and 140

Step-by-step explanation:

The question in English is

Find 2 numbers knowing that the second number is 7 times greater than the first, and the sum between the double of the first number and the triple of the second is 460

Define the variables

Let

x ----> the first number

y ----> the second number

we know that

$y=7x$ -----> equation A

$2x+3y=460$ ----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B

$2x+3(7x)=460$

solve for x

$2x+21x=460$

$23x=460$

$x=20$

Find the value of y

$y=7x$ ----> $y=7(20)=140$

The numbers are 20 and 140

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3 years ago

THE AP CALCULUS EXAM SCORES WERE RELEASED IN JULY. THE SECONDARY MATH SPECIALIST PREPARED THE BOX PLOT SHOWN TO PRESENT THE SCOR

Ganezh [65]

Answer : option A

To find the range of scores that represents the middle 50 % of the student who took the test , we find inter quartile

Inter quartile range is the middle 50% of the given range of scores.

The difference between the upper quartile and lower quartile is the inter quartile that is middle 50%

From the diagram , we can see that

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So range is 65% to 89%

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3 years ago

Find x in this 45°-45°-90° triangle. x=

Blababa [14]

Answer:

Step-by-step explanation:

This is the same question as before just flipped around

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3 years ago

And airplanes at altitude change -370 ft over 7 minutes what was the mean change of altitude in feet per minute?

Reil [10]

We have that
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the answer is -52.86 ft/minute (the negative sign means that the plane is descending)

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3 years ago

A new car depreciates 11% per year. if the new car is worth 23,882 today how much will it worth in 4 years

Andrei [34K]

Answer:

Well..

Step-by-step explanation:

Do 23,882 by 11, then do the answer of that problem divided by 11 and so on

8 0

3 years ago