Ask question

Ask question

All categories

3 years ago

9

Evaluate 7-\left(-19\right)-18+\left(-19\right)+187−(−19)−18+(−19)+187, minus, left parenthesis, minus, 19, right parenthesis, m

inus, 18, plus, left parenthesis, minus, 19, right parenthesis, plus, 18.

1 answer:

IrinaVladis [17]3 years ago

6 0

Answer:

$345$

Step-by-step explanation:

$7-\left(-19\right)-18+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

$7+19-18+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

$26-18+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

$8+\left(-19\right)+187-\left(-19\right)-18+\left(-19\right)+187$

$8-19+187-\left(-19\right)-18+\left(-19\right)+187$

$-11+187-\left(-19\right)-18+\left(-19\right)+187$

$176-\left(-19\right)-18+\left(-19\right)+187$

$195-18+\left(-19\right)+187$

$177+\left(-19\right)+187$

$177-19+187$

$158+187$

$=345$

You might be interested in

During migration 450000 sandhill cranes stop rest in nebraska. about 0.6% of these cranes also stop in to rest in oregon. about

Nastasia [14]

Answer:

2700, my friend. :P

5 0

3 years ago

Select the correct answer

kifflom [539]

Answer:

b

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

NemiM [27]

25 percent is the same as the decimal 0.25.

Multiply 100 by 0.25 to see what 25% of 100 is.
100x0.25=25

Then, to find the price raised by 25%, add 25 to 100.
100+25=125

The final answer is $125.

Hope this helps!

6 0

3 years ago

What % of 400 = 193

saveliy_v [14]

The best way to find your answer is to divide 193 by 400 to get .4825 and to make sure if it is the answer you take 400 and multiply .4825 and it will be 193 so .4825 = 48.25%

3 0

3 years ago

Construct the confidence interval for the population mean mu. c = 0.90, x = 16.9, s = 9.0, and n = 45. A 90% confidence inte

Georgia [21]

Answer:

The 90% confidence interval for population mean is $14.7 < \mu < 19.1$

Step-by-step explanation:

From the question we are told that

The sample mean is $\= x = 16.9$

The confidence level is $C = 0.90$

The sample size is $n = 45$

The standard deviation

Now given that the confidence level is 0.90 the level of significance is mathematically evaluated as

$\alpha = 1-0.90$

$\alpha = 0.10$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the standardized normal distribution table. The values is $Z_{\frac{\alpha }{2} } = 1.645$

The reason we are obtaining critical values for $\frac{\alpha }{2}$ instead of that of $\alpha$ is because $\alpha$ represents the area under the normal curve where the confidence level 1 - $\alpha$ (90%) did not cover which include both the left and right tail while $\frac{\alpha }{2}$ is just considering the area of one tail which is what we required calculate the margin of error

Generally the margin of error is mathematically evaluated as

$MOE = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }$

substituting values

$MOE = 1.645* \frac{ 9 }{\sqrt{45} }$

$MOE = 2.207$

The 90% confidence level interval is mathematically represented as

$\= x - MOE < \mu < \= x + MOE$

substituting values

$16.9 - 2.207 < \mu < 16.9 + 2.207$

$16.9 - 2.207 < \mu < 16.9 + 2.207$

$14.7 < \mu < 19.1$

3 0

3 years ago