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True [87]
3 years ago
13

PLEASE HELP ME !!!!

Mathematics
1 answer:
VikaD [51]3 years ago
7 0

9514 1404 393

Answer:

  C. More than 1 solution

Step-by-step explanation:

Divide the second equation by 3.

  y -x = -3

Add x.

  y = x -3

This matches the first equation exactly, meaning that any solution to the first equation is also a solution to the second equation. There are an infinite number of possibilities. There is "More than 1 solution."

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Dr. Drazzle collected 70 L of ocean water to test for antibacterial properties he split the water into 100 samples how much wate
Mazyrski [523]
70 liters ÷ 100 samples= 0.7 or 7/10 liter per sample

Hope this helps! :)
6 0
3 years ago
Read 2 more answers
Bob and mark talk about their families.bob says he has three kids, the product of Their age is 72. He gives another clue: the su
drek231 [11]
<span>Bob says he has 3 kids, the product of their age is 72.
So the possible ages of Bob's kids can be taken from the factors of 72

72 = 2 * 2 * 2 * 3 * 3

</span><span>Finally, bob says, my youngest child called justice.
</span>So meaning, Bob has a youngest child. He didn't mention about a twin.

So the possible ages the following:
1, 2, 36 --> sum: 39
1, 4, 18 --> sum: 23
1, 8, 9 --> sum: 18

<span>Once the sum of the ages will be revealed, then the possible ages are mentioned above.</span>
8 0
3 years ago
sonja wants to have $14000 in 13 years. calculate how much she should invest now at 6% interest, compounded semiannually in orde
mariarad [96]
She should invest $6491.73.

The equation we use to solve this is in the form
A=p(1+\frac{r}{n})^{nt}, 
where A is the total amount in the account, p is the principal invested, r is the interest rate as a decimal, n is the number of times per year the interest is compounded, and t is the amount of time.

A in our problem is 14000.
p is unknown.
r is 6% = 6/100 = 0.06.
n is 2, since it is compounded semiannually.
t  is 13.

14000=p(1+\frac{0.06}{2})^{13*2}&#10;\\&#10;\\14000=p(1+0.03)^{26}&#10;\\&#10;\\14000=p(1.03)^{26}&#10;\\&#10;\\\text{Dividing both sides by }1.03^{26}\text{, we have}&#10;\\&#10;\\\frac{14000}{1.03^{26}}=\frac{p(1.03)^{26}}{1.03^{26}}&#10;\\&#10;\\6491.73\approx p
5 0
3 years ago
Based on information from Consumer Reports, a random sample of 35 thirty-gram cookies had a sample mean of 146 calories. The sta
Nonamiya [84]

Using the z-distribution, it is found that the 90% confidence interval for mean calories in a 30-gram serving of all chocolate chip cookies is (143, 149).

We are given the <em>standard deviation</em> for the population, which is why the <em>z-distribution </em>is used to solve this question.

The information given is:

  • Sample mean of \overline{x} = 146.
  • Population standard deviation of \sigma = 12.
  • Sample size of n = 65.

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The critical value, using a z-distribution calculator, for a <u>95% confidence interval</u> is z = 1.645, hence:

\overline{x} - z\frac{\sigma}{\sqrt{n}} = 146 - 1.645\frac{12}{\sqrt{35}} = 143

\overline{x} + z\frac{\sigma}{\sqrt{n}} = 146 + 1.645\frac{12}{\sqrt{35}} = 149

The 90% confidence interval for mean calories in a 30-gram serving of all chocolate chip cookies is (143, 149).

A similar problem is given at brainly.com/question/16807970

8 0
2 years ago
RECREATION An instructor at a swimming pool asked her students if they would be interested in a n advanced swimming course, and
vfiekz [6]
She can expect 522 people to take the advanced course.
3 0
2 years ago
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