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Assoli18 [71]
3 years ago
12

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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A pound is about .45 kg. If I collected 3lbs of aluminum , how many kg. Did I collect ?
icang [17]

Answer:

You collected 1,395 kg.

Step-by-step explanation:

Since each pound would be 45 kg and you collected 31 pounds more then you would have to multiply 45 times 31.

3 0
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

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

Lower bound of the interval:

M - zs = 55 - 2.575*2.2 = 49.34

Upper bound:

M + zs = 55 + 2.575*2.2 = 60.66

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.

6 0
3 years ago
Solve for the roots in the equation below. In your final answer, include each of the necessary steps and calculations. Hint: Use
AveGali [126]

Answer:   3

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

x^3-27=0\\\\x^3=27\\\\\sqrt[3]{x^3}=\sqrt[3]{27}\\\\x=\sqrt[3]{3\cdot 3\cdot 3} \\\\x=3

6 0
3 years ago
I WILL MARK BRAINLIEST PLEASE HURRY
AfilCa [17]
Consider, pls, this explanation + solution:
according to the given equation the centre of this circle is in the poit (6;7) and its radius =4 units.
Using this data, it is possible to define right choice: D.

answer: graph D.
4 0
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

7 0
3 years ago
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