All categories

2 years ago

I haven’t done this since 7th grade sorry I just don’t remember

Mathematics

2 answers:

Softa [21]2 years ago

5 0

Elimination is x=3 since you can cancel our out the 3y just add the 8 and 2 which is 10 and 18 and 12 which is 30, devide and there ya go

Digiron [165]2 years ago

3 0

The answer is x=3. You just eliminate

You might be interested in

I NEEDDD HELPPPP ASAPPPP ITS URGENTTT!!!!

natulia [17]

Answer:

(x-6)^2+(y-14)^2=4

Step-by-step explanation:

7 0

2 years ago

PLEASE, I NEED HELP WITH THIS QUESTION!!!!

Usimov [2.4K]

Answer:

7 , 5 , 9

Step-by-step explanation:

8 0

3 years ago

Find the quadratic function that fits the following data. which one function fits.

Oksana_A [137]

Answer:

Step-by-step explanation:

The general rule for the quadratic function is

$y=ax^2+bx+c$

Use the data from the table:

$y(50)=130\Rightarrow 130=a\cdot 50^2+b\cdot 50+c\\ \\y(70)=130\Rightarrow 130=a\cdot 70^2+b\cdot 70+c\\ \\y(90)=200\Rightarrow 200=a\cdot 90^2+b\cdot 90+c$

We get the system of three equations:

$\left\{\begin{array}{l}2500a+50b+c=130\\ \\4900a+70b+c=130\\ \\8100a+90b+c=200\end{array}\right.$

Subtract these equations:

$\left\{\begin{array}{l}4900a+70b+c-2500a-50b-c=130-130\\ \\8100a+90b+c-2500a-50b-c=200-130\end{array}\right.\Rightarrow \left\{\begin{array}{l}2400a+20b=0\\ \\5600a+40b=70\end{array}\right.$

From the first equation

$b=-120a$

Substitute it into the second equation:

$5600a+40\cdot (-120a)=70\Rightarrow 800a=70,\\ \\ a=\dfrac{7}{80},\\ \\ b=-120\cdot \dfrac{7}{80}=-\dfrac{21}{2}=-10.5$

So,

$2500\cdot \dfrac{7}{80}+50\cdot (-10.5)+c=130\Rightarrow 218.75-525+c=130\\ \\c=130-218.75+525=436.25$

The quadratic function is

$y=\dfrac{7}{80}x^2-10.5x+436.25\\ \\y=0.0875x^2-10.5x+436.25$

4 0

3 years ago

The equation below shows the total volume (V), in cubic units, of 9 identical boxes with each side equal to s units:

timurjin [86]

36.864 cubic units is what the answer is

3 0

2 years ago

Line 1 contains the points (6 1) and (6 50 write equation for line 2 that is perpindicular to line 1 and passes through the poin

Readme [11.4K]

Perpendicular:
(50-1)/6-6= slope=undefined= vertical line
y-17=0(x-14)
y-17=0
y=17

Parallel:
since line 1 is vertical we need another vertical line in order for them to be parallel so the line is x=- 4

4 0

2 years ago