All categories

3 years ago

Log x+log7=log 42 solve please

1 answer:

3 0

Log x+ log 7= log 42
log x=log 42 - log 7
log x=log 42/7 [ log a - log b= log (a/b) ]
log x= log 6

therefore:
x=6

Answer: x=6

You might be interested in

If (n+1)!=90×(n-1)!,find n.

Helen [10]

$\displaystyle\bf\\(n+1)!=90\times (n-1)!\\\\(n-1)!\times n\times(n+1)=90\times (n-1)!~~~\Big|~:(n-1)!\\\\n(n+1)=90\\\\n(n+1)=9\times10\\\\n(n+1)=9(9+1)\\\\\implies~~\boxed{\bf n=9}$

4 0

2 years ago

A boy wants to jump onto a carousel that is spinning at a rate of 14 revolutions per minute. If the carousel is 23 feet in diamt

nirvana33 [79]

Answer:

16.86 ft/s

Step-by-step explanation:

Given that

Speed of the carousel, s = 14 rpm

Distance from the carousel, d = 23 ft

To start with, we convert the given speed to revolution per second, so that

s = 14/60 rev/sec

To find the needed speed, we use the formula

v =2πnR, remember that Diameter = 2R, so we substitute D for 2R and get πnD

v = πnD, and we use this to find our needed velocity

v = 3.142 * 14/60 * 23

v = 72.266 * 14/60

v = 16.86 ft/s

Therefore the boy must run at a speed of 16.86 ft/s in order to be able to match the carousel and jump on it

6 0

3 years ago

A large university accepts 70% of the students who apply. Of the students the university accepts, 30% actually enroll. If 30,000

Irina-Kira [14]

Answer:

630

Step-by-step explanation:

you need to do a 2 step equation, first finding the amount of students that get accepted, and then use the info you just got solving how many people actually enroll.

formula:

part part %

---------- = -----------

total total %

5 0

3 years ago

Solve the problems 9^2 4^3 3^2 2^3 5^2

Darina [25.2K]

Answer:

Step-by-step explanation:

hope this helps!

3 0

2 years ago

Can someone do my hw for me

IrinaVladis [17]

Answer:

depends on what the homework is

6 0

2 years ago