All categories

2 years ago

Whoch expression is equivalent to -20 - (-4)

Mathematics

2 answers:

dangina [55]2 years ago

5 0

Answer:

Step-by-step explanation:

-(-4)=+4

so it is -20+4

Setler [38]2 years ago

4 0

Answer:

D) -20 + 4 is the answer.

Step-by-step explanation:

1) Record the terms .

$4 - 20$

2) Use this rule: a - b = -(b - a)

$- (20 - 4)$

3) Use algorithm method.

(see the attached picture)

4) After simplifying, we have:

$-(20 - 4) = - 16$

5) therefor, -20 + 4 = -16

$- 16$

You might be interested in

Plz don’t send me to a website because it is restricted so you go to the websute and tell me the answer plz ok the question is T

Angelina_Jolie [31]

Answer:

-5 is the answer because -5+6=1

6 0

2 years ago

Read 2 more answers

Pam’s eye-level height is 324 ft above sea level, and Adam’s eye-level height is 400 ft above sea level. How much farther can Ad

Tanzania [10]

Answer: The answer is √6 mi.

The formula is: d = √(3h/2)

Pam:

h = 324 ft

d = √(3 * 324/2) = √486 = √(81 * 6) = √81 * √6 = 9√6 mi

Adam:

h = 400 ft

d = √(3 * 400/2) = √600 = √(100 * 6) = √100 * √6 = 10√6 mi

How much farther can Adam see to the horizon?

Adam - Pam = 10√6 - 9√6 = √6 mi

6 0

2 years ago

Read 2 more answers

How do you do this question?

mihalych1998 [28]

Answer:

C) π/6

Step-by-step explanation:

The area under the curve from x=-π/2 to x=k is 3 times the area under the curve from x=k to x=π/2.

$\int\limits^k_{-\frac{\pi }{2}} {cos\ x} \, dx = 3\int\limits^{\frac{\pi }{2}}_k {cos\ x} \, dx\\sin\ x\ |^{k}_{-\frac{\pi }{2}} = 3\ sin\ x\ |^{\frac{\pi }{2}}_k\\(sin\ k - (-1)) = 3\ (1 - sin\ k)\\sin\ k + 1 = 3 - 3\ sin\ k\\4\ sin\ k = 2\\sin\ k = \frac{1}{2}\\k = \frac{\pi}{6}$

Graph: desmos.com/calculator/mezlen9hb4

3 0

3 years ago

Grades on a standardized test are known to have a mean of 1000 for students in the United States. The test is administered to 45

krok68 [10]

Answer:

The 95% confidence interval is $1003 < \mu$

Yes there is statistically significant evidence that students in Florida perform differently from other students in the United States

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 1000$

The sample size is $n = 453$

The sample mean is $\= x = 1013$

The standard deviation is $s = 108$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = 100 - 95$

=> $\alpha = 5\%$

=> $\alpha = 0.05$

The critical value for $\frac{\alpha }{2}$ obtained from the normal distribution table is

$Z_{\frac{\alpha }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{s}{\sqrt{n} }$

=> $E = 1.96 * \frac{108}{\sqrt{453} }$

=> $E = 9.946$

Generally the 95% confidence interval is mathematically represented as

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

=> $1013 - 9.946 < \mu < 1013 + 9.946$

=> $1003 < \mu$

Given that the population mean(1000) is not within the 95% confidence interval for l for the average test score for students in Florida, then it means that there is statistically significant evidence that students in Florida perform differently from other students in the United States

4 0

3 years ago

Nvm nvm nvm nvm mmmmmmmmmmm

sergij07 [2.7K]

Answer:

ok. ok. ok. ok. ok. ok. ok. ok. ok. ok.

6 0

3 years ago

Read 2 more answers

Whoch expression is equivalent to -20 - (-4)​

Whoch expression is equivalent to -20 - (-4)