I need help on this one its hard for me :(

Mathematics

2 answers:

cupoosta [38]3 years ago

8 0

Answer:

The answer for it is B. 6.

Zinaida [17]3 years ago

4 0

Answer:

Step-by-step explanation:

diameter is double the length of the radius.

d= 2r

d=2(3)

d=6

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I NEED HELPPPPP QUICK PLEASE HELP THANKS

stepladder [879]

Answer:

18000$

Step-by-step explanation:

Frim the text you have the formula:

V=c-crt

where,

c=30000

r=0.1

t=4

So, new value after 4y:

V=30000-4*0,1*30000=30000-12000=18000

6 0

3 years ago

Four students were scheduled to give book reports in 1 hour. After the first report, 2/3 hour remained. The next two reports too

Novosadov [1.4K]

Answer:1/4 hour remaining

Step-by-step explanation:

Presenter 1 - 1/3 hour

Presenter 2 - 1/6 hour

Presenter 3 - 1/4 hour

Convert to least common denominator of 12

4/12 + 2/12 + 3/12 = 9/12

12/12 - 9/12 = 3/12

Reduce 3/12 to get 1/4 hour remaining

3 0

3 years ago

Which equation(s) have x = –3 as the solution? log3(2x + 15) = 2 log5(8x + 9) = 2 log4(–20x + 4) = 3 logx81 = 4

baherus [9]

Answer:

log_3(2x+15)=2 and log_4(-20x+4)=3

Step-by-step explanation:

Plug it in and see!

$log_3(2x+15)=2\\log_3(2(-3)+15)=2\\log_3(-6+15)=2\\log_3(9)=2\\\text{ This is a true equation because } 3^2=9\\\\\\log_5(8(-3)+9)=2\\log_5(-24+9)=2\\log_5(-15)=2\\\\\text{ Not true because you cannot do log of a negative number }\\\\log_4(-20(-3)+4)=3\\log_4(64)=3\\\text{ this is true because } 4^3=64\\\\\\log_x (81)=4\\log_{-3}(81)=4\\\text{ the base cannot be negative }\\\\\\\\\text{ There is only two options here} \\\\log_3(2x+15)=2 \text{ and } log_4(-20x+4)=3$