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3 years ago

Solve this system of linear equations. Separate

Mathematics

2 answers:

kupik [55]3 years ago

8 0

Sub in 0 for x and then solve then to the same with Y

uranmaximum [27]3 years ago

5 0

Answer:

That is tough

Step-by-step explanation:

You might be interested in

In the expression, what are the coefficients

Afina-wow [57]

In the expression, the coefficients are 7/9 and 6.

JUST IN CASE YOU DON’T UNDERSTAND:
coefficients are numbers that are placed next to variable(s) - aka x or y. So for instance, in the following: 7/9 x, 7/9 is the coefficient since it’s paired with an alphabet letter or a variable.

I hope that helped and that it wasn’t too confusing. Brainliest answer is always appreciated!

7 0

3 years ago

Suppose that during the past year the price of a laptop computer fell from 2950 to 2450. During the same time period consumer sa

Semmy [17]

Answer:

The price of elasticity of demand is 2.59

Step-by-step explanation:

* Lets explain how to solve the problem

- During the past year the price of a laptop computer fell from

$2950 to $2450

- During the same time period consumer sales increased from

430000 to 619000 laptops

- We need to find the price of elasticity of demand

- The rule of price elasticity is:

price elasticity = percentage of change in the quantity ÷

percentage of change in price

* Lets calculate the percentage of change in quantity and the

percentage of chance in price

∵ The percentage of increasing of quantity = (new - old)/old

∵ New = 619000 and old = 430000

∴ The percentage of increasing of quantity =

$\frac{619000-430000}{430000}*100=43.95$ %

∵ The percentage of decreasing of price = (old - new)/old

∵ New = $2450 and old = $2950

∴ The percentage of decreasing of price =

$\frac{2950-2450}{2950}*100=16.95$ %

- Lets substitute these values in the equation above

∴ Price of elasticity of demand = 43.95% ÷ 16.95% = 2.59

* The price of elasticity of demand is 2.59

7 0

4 years ago

Which choice is the correct answer for: 2.78 * 6? 12.78 16.28 13.18 16.68

Nitella [24]

Answer:

16.68

Step-by-step explanation:

You can either enter it into the calculator or do it the long way.

5 0

3 years ago

Solve the equation 4x+8y=12 for x

kondor19780726 [428]

4x+8y=12

x=2

y = 1/2

Plug in each number

4(2)+8(1/2)=12

8+4=12

7 0

3 years ago

Each year about 1500 students take the introductory statistics course at a large university. This year scores on the final exam

Luba_88 [7]

Answer:

a. Left Skewed

b. More students scored above 70

c. No

d. 0.0008

e. standard deviation increases by 1.4142

Step-by-step explanation:

a. The distribution is Left skewed. The maximum possible score is 100 and the mean is 70, hence, there is a barrier preventing a long right tail.

-The scores to the left is only 20, the left therefore is longer.

-The median, 74, is higher than the mean, 70, thus the mean is more left leaning.

b.More students will score more than 70.

-the median is 74 suggesting that 50% plus have scored 74points +

- Given the mean is 70 points, it's therefore obvious that more than 50% of the students have score more than 70 points.

c. No. This is not a normal distribution therefore we cannot calculate the probability that a randomly chosen student scored above 75 using this distribution.

d. The sample size n is large, n>30, so we can use the central limit theorem to approximate the probability:

$Standard \ Error=\frac{\sigma}{\sqrt{n}}\\\\=\frac{10}{\sqrt{40}}\\\\=1.5811\\\\z=\frac{75-70}{1.5811}\\\\=3.1623\\\\\\(PX>70)=P(z>3.1623)\\\\=0.0008\\$

e. The standard deviation will increase by the square root of the decreament :

$\sqrt{2}=1.4142$

#Standard deviation increases by 1.4142

3 0

3 years ago