Work out p if r =3 and t=4 P=2r+3t

Mathematics

1 answer:

postnew [5]2 years ago

4 0

P=18 because 3 times two is 6 and 4 times 3 is 12 so when you add them you get 18

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Please help asap pleaseeee (picture shown)

Paraphin [41]

The correct answer is 3x+90=180

Because you add the 2x and the x and you get 3x then there is a 90 degree angles so you add that and =180

Once you put it in the equation you can subtract 90 from 180 and you get 90 which you then divided by 3x and x equals 30

4 0

3 years ago

Solve the simultaneous equations 3 x + 2 y = 18 3 x + y = 12

natulia [17]

Answer:

x=2 , y=6

Step-by-step explanation:

3 x + 2 y = 18

3 x + y = 12

(-) (-) (-)

-------------------------------------------

y = 6

3x+6=12

=>3x=12-6

=>3x=6

=>x=6/3

=>x=2

8 0

2 years ago

Please somebody help me with this math problem. I am terrible at math!

Mekhanik [1.2K]

Answer:

1,-1

Step-by-step explanation:

This is because the numbers are increasing.

M = Gradient M = 1/1 = 1

6 0

3 years ago

Read 2 more answers

between 1995 and 2006, the population of samburg, usa(in thousands) can be modeled by f(x) = 0.35x(squared) - 2.1x+15.8 where x=

Juli2301 [7.4K]

$\bf f(x)=0.35x^2-2.1x+15.8\qquad 
\begin{cases}
x=\textit{year since 1995}\\
f(x)=\textit{population amount}
\end{cases}$

the equation is a quadratic one, and it has a positive coefficient on the leading term, meaning, is opening upwards, so it has a "burrow" for the vertex.

the minimum or lowest point for a quadratic opening upwards is, well, the vertex point :), the "x" value is the year, the "y" or f(x) value is the population, we're asked for the year, or the x-coordinate of the vertex

well $\bf \begin{array}{llll}
f(x)=&0.35x^2&-2.1x&+15.8\\
&\quad \uparrow &\quad \uparrow&\uparrow \\
&\quad a&\quad b &c
\end{array}
\\\\

\\\\
\qquad \textit{vertex of a parabola}\\ \quad \\
\qquad 

\left(\boxed{-\cfrac{{{ b}}}{2{{ a}}}}\quad ,\quad {{ c}}-\cfrac{{{ b}}^2}{4{{ a}}}\right)$