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3 years ago

Tell whether (1,6) is a solution of y = x + 7

Mathematics

2 answers:

Anvisha [2.4K]3 years ago

7 0

(1,6) is also (x,y) so that means y=6 and x=1. The full equation would be 6 = 1 + 7 which is not a solution.

andrezito [222]3 years ago

5 0

Answer:

no it is not a solution.READ THE WHOLE EXPLANATION! IT WILL HELP WITH THE OTHER PROBLEMS!!!!

Step-by-step explanation:

when something like (1,6) is written consider it as (x,y). in this case, 1 is considered as x, and 6 is considered as y. if you substitute these number for x and x and y, (x =1 and y =6), you'll see that the equation will go from y=x +7, to 6=1+7. Which is not true.

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Answer:

You collected 1,395 kg.

Step-by-step explanation:

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3 years ago

A poll conducted in 2013 found that 55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard

alina1380 [7]

Answer:

The 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter is between 49.34% and 60.66%, which means that we are 99% sure that the true percentage of US adult Twitter users who get some news is in this interval.

Step-by-step explanation:

Confidence interval:

A confidence interval has the following format:

$M \pm zs$

In which M is the sample mean, z is related to the confidence level and s is the standard error.

55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard error for this estimate was 2.2%.

This means that $M = 55, s = 2.2$

99% confidence level

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$M - zs = 55 - 2.575*2.2 = 49.34$

Upper bound:

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3 years ago

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AveGali [126]

Answer: 3

<u>Step-by-step explanation:</u>

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3 years ago

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3 years ago

Its financial I need help

faust18 [17]

Answer:

12 years

Step-by-step explanation:

Simple interest formula:

$I=P\cdot r\cdot t,$

where

I = interest,

P = principal,

r = rate (as decimal),

t = time

In your case,

P = $616

I = $1,007.78 - $616 = $391.78

r = 0.053

t - unknown, so

$391.78=616\cdot 0.053\cdot t\\ \\t=\dfrac{391.78}{616\cdot 0.053}\approx 12$

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3 years ago