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2 years ago

Is (2,-2) a solution to the following system of equations?

Mathematics

2 answers:

SCORPION-xisa [38]2 years ago

8 0

Answer:

yes?

Step-by-step explanation:

is this a true or false question

(its true)

Nana76 [90]2 years ago

8 0

Answer:

Step-by-step explanation:

Remark

If it was, the value for x should give you the same y in both cases. Try it out.

<u>First Equation</u>

y = -2x + 2

x = 2

y = -2*2 + 2 = -4 + 2 = - 2

<u>Second equation</u>

x = 2

y = 7*2 + 11

y = 14 + 11

y = 25

Conclusion

They are no where near being the same

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226Ra has a half-life of 1599 years. How much is left after 1000 years if the initial amount was 10 g?

Ray Of Light [21]

$\bf \textit{Amount for Exponential Decay using Half-Life}\\\\
A=P\left( \frac{1}{2} \right)^{\frac{t}{h}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{initial amount}\to &10\\
t=\textit{elapsed time}\to &1000\\
h=\textit{half-life}\to &1599
\end{cases}
\\\\\\
A=10\left( \frac{1}{2} \right)^{\frac{1000}{1599}}$

8 0

2 years ago

If 4x + 8x + 12x + 16x is equal to 5 + 10 + 30 + 40 then what is the value of x

zloy xaker [14]

4x+8x+12x+16x=5+10+30+40

4x+8x+12x+16x= 85

40x=85

x= 85/40

x=2.125

7 0

2 years ago

What is happening to this graph when the x-values are between 4 and 8?

Vilka [71]

Answer:

The correct answer is A. It is constant.

Step-by-step explanation:

When the x-values are between 4 and 8, this graph is constant. This can be seen because the graph is a horizontal line, meaning it has zero slope. Since the slope is zero, it is neither increasing nor decreasing, and is known as constant.

Hope this helps!

6 0

3 years ago

What’s the surface area of this shape?

rjkz [21]

Answer:

210 in²

Step-by-step explanation:

6*2.5+6*6*2+(8+6)*2.5+10*2.5+1/2*6*8*2+6*2.5= 210 in²

6 0

2 years ago

I believe the answer is B but I think im wrong

brilliants [131]

The second one is the correct answer. Plug in -3 into the equation.

4 0

2 years ago