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MrRissso [65]
3 years ago
6

Write a word phrase to represent the algebraic expressions 2x + 4

Mathematics
2 answers:
Yuki888 [10]3 years ago
7 0
When i babysit, i get 4 dollars for showing up, and them 2 dollars for every hour that im there. X=hours
PIT_PIT [208]3 years ago
3 0
If the answer isn't: two times x plus four, then im guessing it's something like:
i eat 2 doughnuts per day for x days plus 4 doughnuts when i first bought the box.  sorry if i misinterpret the question.
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A circus acrobat is shot out of a cannon. The equation for the acrobat's pathway can be modeled by h= -16t^2+25. How long will i
Alex_Xolod [135]
For this we almost have the following equation:
 h = -16t ^ 2 + 25

 We must match the equation to zero:
 -16t ^ 2 + 25 = 0

 From here, we clear the value of t.
 We have then:
 16t ^ 2 = 25

t ^ 2 = 25/16
 We discard the negative root because we are looking for time:
 t =  \sqrt{ \frac{25}{16} } 


 t =  \frac{5}{4}
 Answer:
 
it will take him to reach the ground about:
 
t = \frac{5}{4} seconds
5 0
3 years ago
The midpoint of AB is at (3,7) and A is at (0,-5). Where is B located?
olga nikolaevna [1]
\bf \textit{middle point of 2 points }\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
&({{ \square }}\quad ,&{{ \square }})\quad 
%  (c,d)
&({{ \square }}\quad ,&{{ \square }})
\end{array}\qquad
%   coordinates of midpoint 
\left(\cfrac{{{ x_2}} + {{ x_1}}}{2}\quad ,\quad \cfrac{{{ y_2}} + {{ y_1}}}{2} \right)\qquad thus
\\
----------------------------\\\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%  (a,b)
A&({{ 0}}\quad ,&{{ -5}})\quad 
%  (c,d)
B&({{ \square }}\quad ,&{{ \square }})
\end{array}\qquad
%   coordinates of midpoint 
(3,7)\impliedby midpoint\qquad thus
\\ \quad \\
\left(\cfrac{{{ x_2 }} + {{ 0}}}{2}=3\quad ,\quad \cfrac{{{ y_2 }} + {{( -5)}}}{2}=7 \right)\to 
\begin{cases}
\cfrac{{{ x_2 }} + {{ 0}}}{2}=3
\\ \quad \\
\cfrac{{{ y_2 }} + {{ -5}}}{2}=7
\end{cases}
\\ \quad \\
solve\ for\ x_2\ and\ y_2
3 0
3 years ago
Peter has 3200 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed a
salantis [7]

Answer:

A = 640000\,yd^{2}

Step-by-step explanation:

Expression for the rectangular area and perimeter are, respectively:

A (x,y) = x\cdot y

3200\,yd = 2\cdot (x+y)

After some algebraic manipulation, area expression can be reduce to an one-variable form:

y = 1600 -x

A (x) = x\cdot (1600-x)

The first derivative of the previous equation is:

\frac{dA}{dx}= 1600-2\cdot x

Let the expression be equalized to zero:

1600-2\cdot x=0

x = 800

The second derivative is:

\frac{d^{2}A}{dx^{2}} = -2

According to the Second Derivative Test, the critical value found in previous steps is a maximum. Then:

y = 800

The maximum area is:

A = (800\,yd)\cdot (800\,yd)

A = 640000\,yd^{2}

8 0
3 years ago
Read 2 more answers
Which of these shows the result of using the first equation to substitute for y in the second equation then combing like terms
AnnyKZ [126]

2x + 3y = 55

2x + 3(3x) = 55

2x + 9x = 55

11x = 55

\frac{11x}{11}  =  \frac{55}{11}

x=5

8 0
3 years ago
1.28 x 10^5) + (113 x 10^3)=​
Evgesh-ka [11]

Answer:

241,000

Step-by-step explanation:

When multiplying a number with a base of 10 raised to the nth power. Move the decimal point of that number n digits to the right.

(1.28 \times  {10}^{5} ) + (113 \times  {10}^{3} )

128000  \:  +  \: 113000

241000

4 0
3 years ago
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