All categories

3 years ago

What is another solution of the equation x+y=7?

Mathematics

1 answer:

masya89 [10]3 years ago

8 0

Hello.

x=3, y=4
x=-2, y=9
Set x equal to anything, then isolate y to get the other number.

Have a nice day

You might be interested in

An electronics company just finished designing a new tablet computer and is interested in estimating its battery-life. A random

Alika [10]

Answer:

$6 \pm 2.861(0.3354)$

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 20 - 1 = 19

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 19 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 2.861.

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.861\frac{1.5}{\sqrt{20}} = 2.861(0.3354)$

In which s is the standard deviation of the sample and n is the size of the sample.

The format of the confidence interval is:

$S_{M} \pm M$

In which $S_{M}$ is the sample mean

$6 \pm 2.861(0.3354)$

7 0

3 years ago

Walmart sells 5-pound bags of popcorn. The Smith family plans on eating 10 oz. Of popcorn each day until they run out. After how

agasfer [191]

(8 days)because 1 pound equals 16oz
5 times 16 equal 80 oz they plan on eating 10 a day the popcorn will last (8 day)

5 0

4 years ago

What is the probability of drawing a king and a diamond from a standard deck of cards

stiv31 [10]

Answer:

P(king or diamond) = P(king) + P(diamond) - P(king and diamond) P(king or diamond) = (4/52) + (13/52) - (1/52) P(king or diamond) = 16/52 Page 5 P(king or diamond) = 4/13.

3 0

2 years ago

Sharon is buying candy. she buys 5 type on the menu if she splits the price equality with four friends how mich do they each pay

larisa86 [58]

Answer:

D. 0.65

Step-by-step explanation:

0.05 x 5=0.25

0.01 x 5=0.05

0.07 x 5=0.35

0.25+0.05+0.35=0.65

they all must pay 0.65 each

5 0

3 years ago

What is the slope of line AB

bixtya [17]

Answer:

2,3

Step-by-step explanation:

you count up 2,then count over three

8 0

2 years ago