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QveST [7]
3 years ago
13

Wendy asked when you add 9 and 10 is the sum 21?

Mathematics
1 answer:
lina2011 [118]3 years ago
5 0

Answer:

I think the answer is 9+10 =21 or the answer is 40

Idk

Step-by-step explanation:

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Eugene stands 8 feet from a wall where his family portrait is hanging. Eugene's eye height is 5 feet above the floor and the ang
kirill115 [55]

Answer:

13.3 feet.

Step-by-step explanation:

The required height is 5 + 8 tan 46

= 13.3 feet.

8 0
4 years ago
The position function of a particle in rectilinear motion is given by s(t) = 2t^3 + 21t^2 + 60t + 3 for t ≥ 0 with t measured in
natta225 [31]
As the fellow above said, the particle does make a U-turn at the vertex, and we can find that out by getting the derivative of s(t) and zeroing it out to get the point of the horizontal tangent.

Bearing in mind that ds/dt is really v(t) or the velocity equation, so when we zero out the ds/dt, is the same as saying the velocity went to 0, since it got zeroed out, and then the particle goes over the vertex and changes direction.

\bf s(t)=2t^3-21t^2+60t+3\implies \boxed{\cfrac{ds}{dt}=6t^2-42t+60}\leftarrow v(t)
\\\\\\
0=6t^2-42t+60\implies 0=t^2-7t+10\implies 0=(t-5)(t-2)
\\\\\\
t=
\begin{cases}
5\\
2
\end{cases}\impliedby \textit{it makes the first turn at the \underline{2 second}}
\\\\\\
\textit{now let's find the acceleration equation, a(t)}
\\\\\\
\boxed{\cfrac{d^2s}{dt^2}=12t-42}\leftarrow a(t)\\\\
-------------------------------\\\\
s(2)=55\qquad \qquad \qquad \qquad a(2)=-18

the negative acceleration value, simply means a decreasing rate of change, so, it means the particle is slowing down and possibly coming to a stop before changing direction again.
8 0
3 years ago
A badge costs 78p.
Inga [223]
Sam would have 41 pence change
6 0
3 years ago
Read 2 more answers
Shenika factored the polynomial completely. what is the value of a? 5x3 35x2 6x 42 (5x2 a)(x b) 1 5 6 7
labwork [276]

Factorising the polynomial 5x³ + 35x² + 6x + 42, the value of A is 6.

<h3>Factorisation of polynomial</h3>

Factorising a polynomial simply means to decompose the polynomial into a product of two or more polynomials.

Therefore, let's factorise 5x³ + 35x² + 6x + 42 and find the value of A

(5x² + A)(x + B)

Therefore,

5x³ + 35x² + 6x + 42

5x³ + 6x  + 35x² + 42

x(5x² + 6) + 7(5x² + 6)

Therefore,

(5x² + 6)(x + 7)

Therefore, the value of A is 6

learn more on factorisation here; brainly.com/question/1415111

#SPJ4

3 0
2 years ago
3. In an election, about 500,000 people voted in all. hat could be the exact number of people who voted in the election?
Snowcat [4.5K]
Wells voted in the election
3 0
4 years ago
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