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3 years ago

Guys i'm really dumb, please help me, thank you

Mathematics

2 answers:

MrRa [10]3 years ago

6 0

It’s the first choice because of the mm

melisa1 [442]3 years ago

4 0

Answer:

44cm^2

Step-by-step explanation:

（a+b)h/2

=(9+13)4/2

=22x4/2

=88/2

=44

The Area is 44 cm^2, so it's the first choice.

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I will give brainliest to anyone who gives me a correct answer

Pachacha [2.7K]

Answer:

Step-by-step explanation:

Let's check the first condition [y=110, t=0] for all the choices and eliminate:

$y = 110e^{7t} - 80\\y = 110e^{0} - 80\\y=30$

$y = 110 - 80e^{-5t}\\y = 110 - 80e^{0}\\y=30$

$y = 30 + 80e^{-2t}\\y = 30 + 80e^{0}\\y=110$

YES

$y = 110 - 80e^{2t}\\y = 110 - 80e^{0}\\y=30$

$y = 30 - 80e^{-4t}\\y = 30 - 80e^{0}\\y=-50$

Note: e^0 = 1

Only C is satisfied. But let's make sure the 2nd condition applies as well.

$y = 30 + 80e^{-2t}\\y = 30 + 80e^{-\infty}\\y=30+\frac{80}{e^{\infty}}\\y>>30$

Hence, y approaches 30 as t goes to infinity. 2nd condition is satisfied as well.

Answer is C

4 0

4 years ago

Please help!!

LuckyWell [14K]

Answer:

Hmmmmm.....

Step-by-step explanation:

There were two and a half pizzas, but only 1/4 pies, so how many pieces of pizza would go with the amount of cake if you wanted to make the numbers proportional?

Idk

I answered only because you said please

7 0

4 years ago

Use the parabola tool to graph the quadratic function f(x)=−5x2−2.

alexira [117]

$\text{Consider the quadratic function}\\
\\
f(x)=-5x^2-2\\
\\
\text{For a quadratic equation, }f(x)=ax^2+bx+c, \text{ we know that the x-coordinate}\\
\text{of the vertex (h,k) is given by}\\
\\
h=\frac{-b}{2a}\\
\\
\text{on comparing the given equation with standard equation, we have}$

$a=-5, b=0, c=-2\\
\\
\text{so the x-coordinate of the vertex is }\\
\\
h=-\frac{b}{2a}=-\frac{0}{2(-5)}=0\\
\\
\text{so plug this vlaue of the h in the given function to get the y-coordinate}\\
\text{of the vertex. so}\\
\\
f(x)=-5(0)^2-2=0-2=-2\\
\\
\text{hence the vertex of the parabola is: }(h,k)=(0,\ -2)\\
\\
\text{A second point on the graph can be found by putting x=1, so }\\
\\
f(1)=-5(1)^2-2=-5-2=-7\\
\\
\text{so one other point on the parabola is }(1,-7)$

The grpah of the quadratic function is shown below:

5 0

4 years ago

What is the x and y intercept of this equation 12x+4y=24

slavikrds [6]

Answer:

y = 6,x = 2

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

To eliminate the terms and solve for y in the tewest steps, by which constants should the equations be multiplied by before

Novosadov [1.4K]

Answer:

the equation is not shown...

Step-by-step explanation:

but to solve for y you should use the first equation that is use the coefficient of x in the first equation to multiply all the terms in the second equation.

And use the coeffient of x in the second equation to multiply the the terms in the first equation.

It would have been better if the equation was shown for better explanation.

6 0

3 years ago