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3 years ago

200 + 500 - 30 = solve

Mathematics

2 answers:

valina [46]3 years ago

6 0

200 + 500 =700 -30 = 670

nevsk [136]3 years ago

5 0

Answer:670

Step-by-step explanation:

200 + 500 - 30 =

700-30

670

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Complete the equation: x^2+8x + _=(_)^2

pentagon [3]

Answer:

x^2+8x+16=(x-4)^2

EXPLANATION:

(a+b)^2=a2+2.a.b+b2

we have to break the middle term in 2ab here a is x then 2xb=8x, => b=4, but value of a and b to get the required equation!

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3 years ago

I NEED HELP PLEASE !!!

bija089 [108]

Answer:

The first choice

Step-by-step explanation:

Perpendicular lines intersect to form right angles, like the x- and y-axis on a coordinate plane.

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3 years ago

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Help please I will name the Brainily answer

bazaltina [42]

Answer:

Step-by-step explanation:

So, for five cups of water, you need one cup of sugar. 1s=5w.

Now, you divide both sides by five.

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3 years ago

Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic t.

lawyer [7]

Using the t-distribution, it is found that the p-value of the test is 0.007.

At the null hypothesis, it is tested if the mean lifetime is not greater than 220,000 miles, that is:

$H_0: \mu \leq 220000$

At the alternative hypothesis, it is tested if the mean lifetime is greater than 220,000 miles, that is:

$H_1: \mu > 220000$ .

We have the standard deviation for the sample, thus, the t-distribution is used. The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.
$\mu$ is the value tested at the null hypothesis.
s is the standard deviation of the sample.
n is the sample size.

For this problem:

$\overline{x} = 226450, \mu = 220000, s = 11500, n = 23$

Then, the value of the test statistic is:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{226450 - 220000}{\frac{11500}{\sqrt{23}}}$

$t = 2.69$

We have a right-tailed test(test if the mean is greater than a value), with t = 2.69 and 23 - 1 = 22 df.

Using a t-distribution calculator, the p-value of the test is of 0.007.

A similar problem is given at brainly.com/question/13873630

8 0

3 years ago

Find the missing number. Enter your answer. 80 х ? = 640

miss Akunina [59]

Answer:

Step-by-step explanation:

640/80=8

8*80=640

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3 years ago

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200 + 500 - 30 = solve​

200 + 500 - 30 = solve