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3 years ago

Anyone who can help me out with the above question

Mathematics

1 answer:

Citrus2011 [14]3 years ago

5 0

Answer:

Simplified: 0.024

Step-by-step explanation:

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I need help plz

shusha [124]

The solution for given linear equation systems is (3,-4).

Option: C

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

The given equations are 5x+3y=3 and x+y= -1.

Let us isolate x value from equation 5x+3y=3.

5x = 3-3y.

$x=\frac{3-3y}{5}$ .

Substitute this x value in equation x+y= -1.

$\frac{3-3y}{5}+y=-1$ .

After taking LCM for the denominator,

$\frac{3-3y+5y}{5}= -1$ .

3-3y+5y=-5.

2y=-8.

y=-4.

For $x=\frac{3-3y}{5}$ substitute the y value.

$x=\frac{3-3(-4)}{5}$ .

$x=\frac{3+12}{5}$ .

$x=\frac{15}{5}$ .

x=3.

∴ The solution is (3,-4).

8 0

3 years ago

Jeanette purchase a concert ticket on a website the original price of the ticket was $75 she used a coupon code to receive 20% d

Radda [10]

Answer:

10%

Step-by-step explanation:

20%=20/100=0.20

75$x.0.20=15$

The price when she received a 20% discount was:

75$-15$=60$

Then, the web site applied a 10% service fee to the discounted price, so you have:

10/100=0.10

75$x0.10=7.5$

60$+7.5$=67.5$

So, if 75$ is the 100% of the price, what percentage represents 67.5$?

75$--------100%

67.5$------x

x=67.5 x 100/75

x=90%

Then,

100%-90%=10%

3 0

3 years ago

Khan academy!! Pls help will give brainllyest!!!

Anastaziya [24]

Answer:

Step-by-step explanation:

<u>D.</u> A negative times a positive gives you a negative, so the first 2 fractions will still be negatives after they get out of the parenthesis

<u>C.</u> The 4/7 and -4/7 cancel out

7 0

3 years ago

Read 2 more answers

If we consider the simple random sampling process as an experiment, the sample mean is a. a random variable. b. always zero. c.

marta [7]

The sample mean is an estimate of the population mean.

The sample mean is exactly equal to the population mean

<h3>How to determine the true statement</h3>

When the population mean is known; the value of the population mean can be used as the sample mean.

This is so because:

The sample mean is an estimate of the population mean.

And it is represented as:

$\bar x = \mu$

Hence, the true statement is that the sample mean is exactly equal to the population mean

Anyone who can help me out with the above question​

Anyone who can help me out with the above question