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kupik [55]
3 years ago
8

What is the value of the expression below plz help!

Mathematics
1 answer:
olga55 [171]3 years ago
3 0

2y^2 + 9y + 2, while y = 7

Plug 7 in for y

2(7)^2 + 9(7) + 2

Simplify

98 + 63 + 2

Add together each term

163

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Graph the linear equation. Find three
belka [17]

Answer:

Part 1) The graph in the attached figure

Part 2) Three points that solve the equation could be (-18,0),(0,4.5) and (-2,4)

Step-by-step explanation:

we know that

To graph a line we need to plot two points

If a point solve the linear equation, then the point is a solution of the linear equation

step 1

Find the first point that solve the equation

<em>Find the x-intercept</em>

The x-intercept is the value of x when the value of y is equal to zero

For y=0

x - 4(0) =-18

x=-18

The x-intercept is the point (-18,0)

step 2

Find the second point that solve the equation

<em>Find the y-intercept</em>

The y-intercept is the value of y when the value of x is equal to zero

For x=0

0 - 4y =-18

-4y=-18

y=4.5

The y-intercept is the point (0,4.5)

step 3

With the intercepts graph the line

Plot the intercepts and join the points to graph the line

using a graphing tool

see the attached figure

step 4

Find the third point that solve the equation

Assume a value for x and then solve for y

I assume x=-2

substitute in the linear equation and solve for y

-2 - 4y =-18  

-4y=-18+2

-4y=-16

y=4

The third point is the point (-2,4)

7 0
3 years ago
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3 0
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At the beginning of an environmental study, a forest covered an area of 1500 km. Since then, this area has decreased by 7.25% ea
WITCHER [35]

\qquad \textit{Amount for Exponential Decay} \\\\ y=P(1 - r)^t\qquad \begin{cases} y=\textit{current amount}\\ P=\textit{initial amount}\dotfill &1500\\ r=rate\to 7.25\%\to \frac{7.25}{100}\dotfill &0.0725\\ t=\textit{elapsed time}\dotfill &t\\ \end{cases} \\\\\\ y=1500(1-0.0725)^t\implies y=1500(0.9275)^t

5 0
2 years ago
Find the interest due on $950 at 13% for 120 days.
exis [7]
950  x 13 /100 x 120/365 = $ 40.60. Hope that's helpful.


7 0
3 years ago
Read 2 more answers
What is the value of p ?
VLD [36.1K]

Answer:

p = 35

Step-by-step explanation:

180 - 125 = 55

180 - 90 = 90

55 + 90 = 145

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p = 35

6 0
3 years ago
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