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3 years ago

Plzzzzzzzzzzzzzzzzzzzzz answer!!!!!!!!!!!!!

Mathematics

1 answer:

GrogVix [38]3 years ago

7 0

Answer:

This is quadratic trinomial

Step-by-step explanation:

It has x^2 (square) and consists of 3 parts

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Solve the system of equations. x + 3y = −12x + 2y = 6

UkoKoshka [18]

Answer:

x=-3/19

y=39/19

Step-by-step explanation:

the equations can be written as the following system

$x+3y=6\\-12x+2y=6$

If the second equation is multiplied by 3/2 it will become -18x+3y=9

If that equation is then subtracted with the first you will obtain the following

-19x=3, it means x=-3/19

The other variable is obtained by substituting the new value for x in the first equationx+3y=6, thus we obtain that y=39/19

7 0

2 years ago

What are the solutions to 0=x^2-x+1?

kumpel [21]

Answer: No solutions

Step-by-step explanation:

There are no solutions to 0 = x² - x + 1.

[Method One]

We can solve this by rewriting the equation, but it is quicker to graph it when there are no solutions. See attached.

[Method Two]

I said we can solve this by solving an equation, here it is. We will use the quadratic formula since the equation given is already in the proper form.

$\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

$\displaystyle x=\frac{1\pm\sqrt{(-1)^2-4(1)(1)} }{2(1)}$

$\displaystyle x=\frac{1\pm\sqrt{-3} }{2}$

-> Negative numbers don't have real square roots, so there is no solution

4 0

1 year ago

FIRST ANSWER GETS BRAINLIEST

Anarel [89]

Answer:

4/15

Step-by-step explanation:

You would do it as follows

I-8/15I reduce the fraction by 2

I-4/25I the absolute fraction is always positive

So the solution is

4/25

Alternative forms are:

0.16 or (2/5)^2 (Just incase)

5 0

2 years ago

Read 2 more answers

A small business ships specialty homemade candies to anywhere in the world. Past records indicate that the weight of orders is n

Fantom [35]

Answer:

90% confidence interval for the true mean weight of orders is between a lower limit of 103.8645 grams and an upper limit of 116.1355 grams.

Step-by-step explanation:

Confidence interval for true mean weight is given as sample mean +/- margin of error (E)

sample mean = 110 g

sample sd = 14 g

n = 16

degree of freedom = n - 1 = 16 - 1 = 15

confidence level = 90% = 0.9

significance level = 1 - C = 1 - 0.9 = 0.1 = 10%

critical value (t) corresponding to 15 degrees of freedom and 10% significance level is 1.753

E = t × sample sd/√n = 1.753×14/√16 = 6.1355 g

Lower limit of sample mean = sample mean - E = 110 - 6.1355 = 103.8645 g

Upper limit of sample mean = sample mean + E = 110 + 6.1355 = 116.1355 g

90% confidence interval is (103.8645, 116.1355)

4 0

2 years ago

Read 2 more answers

Which equation gives the value of the circumference, C, of a circle with a diameter of 56 feet?

Alik [6]

Answer:

$C=\pi (56)$

Step-by-step explanation:

we know that

The circumference of a circle is equal to

$C=\pi D$

where

D is the diameter

in this problem we have

$D=56\ ft$

substitute

$C=\pi (56)$ -----> equation that give the value of the circumference

$C=56 \pi\ ft$

5 0

2 years ago

Read 2 more answers