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Murljashka [212]

3 years ago

6

Which of the following best sums up how the focus of

2 answers:

ludmilkaskok [199]3 years ago

7 0

Oceans one ocean at a time.

Aleonysh [2.5K]3 years ago

4 0

Oceans one ocean at a time

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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!

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

6 0

4 years ago

Read 2 more answers

If there are 460 pounds for every 4 pellets how many pounds are for 16 pellets.

WINSTONCH [101]

Answer:

1840

Step-by-step explanation:

4 pellets x 4 = 16 pellets

460 pounds x 4 = 1840 pounds

4 0

3 years ago

Read 2 more answers

The difference in age between Brita and her daughter Eva is 30 years. The sum or their ages 118. How old is Eva?

Alona [7]

Answer:

Eva's age is 44 years

Step-by-step explanation:

Let

x ----> Brita's age

y ----> Eva's age

we know that

The sum or their ages 118

so

$x+y=118$ ----> equation A

The difference in age between Brita and her daughter Eva is 30 years

so

$x-y=30$ ----> equation B

Solve the system by elimination

Adds equation A and equation B

$x+y=118\\x-y=30\\---------\\x+x=118+30\\2x=148\\x=74$

<em>Find the value of y</em>

substitute the value of x in any equation

$74+y=118\\y=118-74\\y=44$

therefore

Eva's age is 44 years

3 0

3 years ago

The mean number of points in 1977 was 1189 points with standard deviation of 397 points. With a roughly normal distribution, wha

KonstantinChe [14]

Answer:

C. 95%

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.

Approximately 95% of the measures are within 2 standard deviations of the mean.

Approximately 99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean of 1189 points, standard deviation of 397 points.

Percentage between 395 and 1983 points?

395 = 1189 - 2*397

1983 = 1189 + 2*397

So within 2 standard deviations of the mean, which by the Empirical Rule is approximately 95%, and the answer is option C.

5 0

3 years ago

Solve for x. −46 x=25

kvv77 [185]

-46 + x = 25
x = 25 + 46 = 71

5 0

3 years ago