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3 years ago

Any help (pre-algebra)!? An explanation would be helpful too.

Mathematics

2 answers:

Mandarinka [93]3 years ago

5 0

Answer:

your answer will be 0.75

Step-by-step explanation:

hope it helps

have a nice day!!

Katarina [22]3 years ago

5 0

I will do it in a way that can solve all these kinds of problem.

Of course, you can just substitute every possible answer in and see which one has the highest y value.

BUT I'm going to do this question by completing the square.

First organize the equation by decreasing degrees.

y=-16t^2+32t

Now factor out a -16 to make the x variable have no coefficient.

y=-16(t^2-2t)

Now complete the square.

y=-16(t-1)^2+16

By this if you graph it its the parent graph y=x^2, its a reflection over x axis by the negative sign at the beginning, then a vertical stretch by 16, and then go to the right by 1 then up by 16. This meant that the vertex is (0,0) go right 1 and up 16.

The vertex or the highest point of the graph is point (1,16) This also meant that its after 1 second at 16 feet height. The answer is B.

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Use implicit differentiation to find an equation of the tangent line to the curve at the given point. x2 + 2xy − y2 + x = 20, (3

marin [14]

$\bf x^2+2x6-y^2+x=20\impliedby taking\ \cfrac{dy}{dx}\textit{ to both sides}
\\\\\\ 2x+2\left( y+x\frac{dy}{dx}\right)-2y\frac{dy}{dx}=0\impliedby \textit{common factor 2}
\\\\\\
2\left[ x+\left( y+x\frac{dy}{dx}\right)-y\frac{dy}{dx}\right]=0
\\\\\\ x+y+x\frac{dy}{dx}-y\frac{dy}{dx}=0\impliedby \textit{common factor }\frac{dy}{dx}
\\\\\\
\cfrac{dy}{dx}(x-y)=-x-y\implies \cfrac{dy}{dx}=\cfrac{-x-y}{x-y}\qquad 
\begin{cases}
x=3\\
y=4
\end{cases}\ then
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$\bf \cfrac{dy}{dx}=\cfrac{-3-4}{3-4}\implies \cfrac{dy}{dx}=7\\\\
-----------------------------\\\\
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6 0

3 years ago

Solve for x.<br> (17x - 23)<br> (&r - 4)*<br> -(3x + 17)

Finger [1]

Answer:

17rx2−23rx−71x+75

Step-by-step explanation:

(17x−23)(xr−4)−(3x+17)

=(17x−23)(xr−4)+−1(3x+17)

=(17x−23)(xr−4)+−1(3x)+(−1)(17)

=(17x−23)(xr−4)+−3x+−17

=(17x)(xr)+(17x)(−4)+(−23)(xr)+(−23)(−4)+−3x+−17

=17rx2+−68x+−23rx+92+−3x+−17

=(17rx2)+(−23rx)+(−68x+−3x)+(92+−17)

=17rx2+−23rx+−71x+75

6 0

3 years ago

Elle drew rectangle that was 3 units wide and 4 units long drew different rectangle that has same permiter but a different area

mafiozo [28]

The perimeter is 14. The area is twelve. You could do 6*1, because 6*1 is six, but 6+6+1+1=14.

8 0

3 years ago

Read 2 more answers

Help I don’t get these at all

xxTIMURxx [149]

You have a lot of questions here, so I'm going to help you with the bottom four.

Combine like terms:

3q - 8 - 6p + 8q - 4p

We can rearrange the terms to make this easier to simplify.

3q + 9q - 6p - 4p - 8

12q - 10p - 8 is the simplified version of the expression.

Simplify.

-32t/12t

The best way to simplify this is to look for the GCF of 32 and 12, which is 4.

-32/4 = -8

-12/4 = -3

The simplified form of this fraction is -8t/3t

[3(x - 4) - 2] + [5(x - 1) + 5]

There are two important things you need to know here.

First, you need to know PEMDAS.

Second, you need to know the distributive property.

First, we're going to use the distributive property.

[3x - 12 - 2] + [5x - 5 + 5]

Now, we just combine like terms.

3x - 14 + 5x

Then we do it again.

8x - 14 is the simplified version of the given expression.

30 + 19 * 26 - (-16)

This is more of a PEMDAS problem than the last, so we'll work through this in order.

First up is Multiplication.

Multiply 19 * 26

30 + 494 - (-16)

Next, we add, from left to right.

524 - (-16)

Because we have two negative signs, they cancel out and create a plus sign.

524 + 16

Add.

540

8 0

3 years ago

Select the expression that is equivalent to (x-3)^2

const2013 [10]

The answer is C. X^2-6x+9

4 0

4 years ago

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