All categories

3 years ago

10x + 9y - 10z = -7 72 - 9y + 72 = 0 7x – 3y + 2z = 2

Mathematics

1 answer:

k0ka [10]3 years ago

5 0

Answer:

-10x + 6y + 2z = -30 10x + 2y + 8z = 18 8y + 10z = -12 4y + 5z = -6 -15x + 9y + 3z = -45 15x + 5y + 7z = 9 14y + 10z = -36 7y + 5z = -18 7y + 5z = -18 -4y - 5z = 6 8x-9y=72. 8x−9y=72 8 x - 9 y = 72. 3y - 3y x?+6x=2x-4 x²+4X=-4 x2+4x +4= 0. (x+2)(x+2) =0. X=-2 x=-2 ... 6-3x = 4x + 4. . 2=7x -. - 4-2=34+12. - ý 2=2y+12. +. 3X= 12-X.

Step-by-step explanation:

i suck at math XD

You might be interested in

Is 2/7x proportional on a graph

Dvinal [7]

No it’s proportional on a table doe

7 0

3 years ago

What is 3x?

MissTica

Answer: 3 · 30= 90

Step-by-step explanation:

yes you are correct

6 0

3 years ago

Please I need this question fast

Mrrafil [7]

We have a linear function $\displaystyle\bf y=\underbrace{k}_{gradient}x+b$ and we know that $\displaystyle\bf \left \{ {{-2\cdot-3+b=2} \atop {-4\cdot -2+b=k}} \right. => \left \{ {{b=-4} \atop {b+8=k} \right. => k=8-4=4 \\\\Answer: \boxed{B) \quad k=4}$

6 0

3 years ago

A mango weighs 36 ounces. The total weight of 3 magoes and 1 apple is the same as the weight of 5 apples. How much does 1 apple

Vadim26 [7]

Data:

M (mango)
A (apple)

We have:
1M = 36 ounces
3M + 1A = 5A

Replace and solving:

$3M + 1A = 5A$
$
3.(36) + 1A = 5A$
$108 + 1A = 5A$
$108 = 5A - 1A$
$108 = 4A$
$4A = 108$
$A = \frac{108}{4}$
$\boxed{A = 27}$

Answer:
Aple weigh 27 ounces

5 0

3 years ago

I really need help !!!

Marta_Voda [28]

Answer:

heyy sorry i dont really know what is the 'standard deviation' but as for the mean you go to add all the numebers together and divide them by the amount of numbers there are (7 in this scenario)

Step-by-step explanation:

21 + 29.5 + 38 + 46.5 + 55 + 63.5 + 72 = 325.5

then you divide 325.5 by the number of numbers present in the question

325.5 / 7 = 46.5

hope it helped :)

3 0

3 years ago