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3 years ago

6 + x is an example of _____. a variable an expression a constant a formula

Mathematics

1 answer:

andreev551 [17]3 years ago

6 0

Answer: a formula

Step-by-step explanation:

Its easy, just because you see that there is a variable, but there is also a formula. The answer could be a formula. If it was all letters, the answer would be variable, but its not. The answer is a formula.

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If bob has five apples and he eats 2 how many does he have left

qwelly [4]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What is value of x if 20x-10*110=50

Tju [1.3M]

Answer:

57.5

Step-by-step explanation:

20x - (10 x 110) = 50

=> 20x - 1100 = 50

=> 20x = 1150

=> x = 1150/20

=> x = 115/2

=> x = 57.5

3 0

3 years ago

You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the a

svetoff [14.1K]

Answer:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

Step-by-step explanation:

We have the following info:

$ME = 50$ margin of error desired

$\sigma = 1000$ the standard deviation for this case

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =50 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=0.01$ . And for this case would be $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

5 0

3 years ago

HELPP WILL GIVE BRAINS!!!

Arlecino [84]

Answer:

140,556 miles

Step-by-step explanation:

CAN I BE BRAINS

3 0

3 years ago

The two lines y = x + 9 and y = -x − 9 are:

Bond [772]

Answer:

Neither parallel nor perpendicular

Step-by-step explanation:

To tell whether two lines are parallel or perpendicular, look at their slopes.

Parallel lines will have the same slope. This isn't the case since the first line has a slope of 1 and the second has a slope of -1.

Perpendicular line have slopes that are negative inverses of the other. This also isn't the case for these two lines. Although the slopes have opposite signs, the numbers aren't inverses.

The two lines are neither parallel nor perpendicular.

8 0

3 years ago