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3 years ago

Please help me compute 5 P2a. 20b. 10c. 3d. 2.5

1 answer:

Nookie1986 [14]3 years ago

6 0

Formula: $_nP_r= \dfrac{n!}{(n-r)!}\)$

n = 5 , r = 2

$_5P_2=\dfrac{5!}{(5-2)=3!}\)$

$\dfrac{5!=5*4*3*2*1}{3!=3*2*1}=\dfrac{5*4}{1}=5*4=20$

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The record high temperature in January was 18 degrees. The record low temperature was –7 degrees. What is the amount of change b

vodka [1.7K]

Answer: $25^{\circ}$

Step-by-step explanation:

Given

The highest temperature recorded is $18^{\circ}$

The lowest temperature recorded is $-7^{\circ}$

The amount of change between the high and the low temperatures is

$\Rightarrow 18-(-7)=18+7\\\Rightarrow 25^{\circ}$

6 0

3 years ago

Can someone plsss help me with the 2 one

stepan [7]

Answer: $\sqrt{73}$ for number 7

Step-by-step explanation:

a²+b²=c²

3²+8²=c²

9+64=c²

$\sqrt{73}=\sqrt{c^2}\\\sqrt{73}=c$

8 0

3 years ago

What is g(r)=−5r+13

tatiyna

I think the answer is: r=13/16

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4 years ago

A particular rocket taking off from the earth surface uses fuel at a constant rate of 12.5 gallons per minute the rocket initial

faltersainse [42]

Answer:

$y=12.5x+225$

Step-by-step explanation:

Let

x ----> the number of minutes

y ----> the amount of fuel in gallons

we know that

The linear equation in slope intercept form is equal to

$y=mx+b$

where

m is the unit rate or slope

b is the y-intercept or initial value

we have that

The unit rate or slope is equal to

$m=12.5\ \frac{gal}{min}$

$b=225\ gal$ ----> initial value (value of y when the value of x is equal to zero)

substitute

$y=12.5x+225$

3 0

3 years ago

Thirty more than one half of the students at at canyon middle school are in band.Five less than three fifths of the students are

Fed [463]

Answer:

Students at canyon middle school = 350

Step-by-step explanation:

Students at canyon middle school = x

Band = 1/2x + 30

Athletics = 3/5x - 5

athletics.If the number of students who are in band is equal to the number of students in athletics

1/2x + 30 = 3/5x - 5

1/2x - 3/5x = -5 - 30

5x-6x/10 = -35

-x/10 = -35

= -x(1/10)= -35

x = -35 ÷ -1/10

= -35 × -10/1

= 350

x = 350

Students at canyon middle school = 350

4 0

3 years ago