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3 years ago

Solve the system of equations -5X + 4Y = 3 X = 2Y - 15 X= Y=

Mathematics

1 answer:

swat323 years ago

4 0

Answer:

{y,x} = {2,-11}

Step-by-step explanation:

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SOMEONE PLEASE HELP ASAP IM IN A TEXT NO EXPLANAION NEEDED JUST THE FUNCTION!!THANK YOU SO MUCH :)

Lynna [10]

Answer:

$\frac{-1}{4} x^{2}$

$\frac{-1}{4} g(x)$

Step-by-step explanation:

3 0

3 years ago

PLEASE ANSWER

Olenka [21]

Answer:

x(1 - .4)

Step-by-step explanation:

x = regular price.

1 - .4 = .6 = 60%

The sale price is equal to the full price (aka x) minus the discounted price (40% of x = 40/100 times x = .4x)

Therefore sale price = x - .4x or x(1 - .4)

4 0

3 years ago

An Article a Florida newspaper reported on the topics that teenagers most want to discuss with their parents. The findings, the

Sergio039 [100]

Answer:

The estimate is $P__{hat}} \pm E = 0.37 \pm 0.0348$

Step-by-step explanation:

From the question we are told that

The sample size is n = 522

The sample proportion of students would like to talk about school is $\r p__{hat}} = 0.37$

Given that the confidence level is 90 % then the level of significance can be mathematically evaluated as

$\alpha = 100 - 90$

$\alpha = 10\%$

$\alpha = 0.10$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table, the value is

$Z_{\frac{\alpha }{2} } =Z_{\frac{0.10}{2} } = 1.645$

Generally the margin of error can be mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \sqrt{\frac{\r P_{hat}(1- \r P_{hat} )}{n } }$

=> $E = 1.645 * \sqrt{\frac{0.37 (1- 0.37 )}{522 } }$

=> $E = 0.0348$

Generally the estimate the proportion of all teenagers who want more family discussions about school at 90% confidence level is

$P__{hat}} \pm E$

substituting values

$0.37 \pm 0.0348$

5 0

3 years ago

Ez points lol...............

love history [14]

Answer:

It's D

Step-by-step explanation:

Stay frosty

3 0

3 years ago

Read 2 more answers

Graham is hiking at an altitude of 14,040 feet and is descending 50 feet each minute. Max is hiking at an altitude of 12,500 fee

alina1380 [7]

Graham: -50x + 14,040

Max: 20x + 12,500

Graham = Max

-50x + 14,040 = 20x + 12,500

+50x +50x

14,040 = 70x + 12,500

-12,500 -12.500

1,540 = 70x

$\frac{1,540}{70} = \frac{70x}{70}$

220 = x

Answer: 220 minutes (3 hours 40 minutes)

5 0

4 years ago

Read 2 more answers