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3 years ago

F(x)=3x^2+8x+5 find value of f(a)

Mathematics

1 answer:

Korolek [52]3 years ago

7 0

f(a) = 3a² + 8a + 5

substitute x = a into f(x)

f(a) = 3a² + 8a + 5

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A car is traveling at a speed of 79 feet per second. (a) what is its speed in kilometers per hour?

AysviL [449]

79 ft/s = 0.0240792 km/s

0.0240792 x 60 = 1.444752 km/minute
<span>1.444752 x 60 = </span><span>86.68512 km/hour
</span>
Ans: 86.69 km/h

6 0

3 years ago

There are 3 people pulling on an object, the first person pulls with a force of 226 newtons at a direction of 145 degrees the se

Alona [7]

Answer:

$R=883.74N$

Step-by-step explanation:

From the question we are told that:

Force 1 $F_1=226N$

Force 2 $F_2=331N$

Force 3 $F_3=377N$

Direction 1 $\theta_1=145 degrees \approx 35 \textdegree (2nd qudrant)$

Direction 2 $\theta_2=303 degrees \approx 57 \textdegree (3rd qudrant)$

Direction 3 $\theta_3=77 degrees$

Generally Resolving forces to X axis is mathematically given by

$\sum f_x=337cos77+331cos57+226sin35$

$\sum f_x=351.596N$

Generally Resolving forces to Y axis is mathematically given by

$\sum f_y=337sin77+331sin57+226cos35$

$\sum f_x=810.788N$

Generally the equation for Resultant force R is mathematically given by

$R=\sqrt{\sum f_x^2+\sum f_x^2}$

$R=\sqrt{351.596^2+810.788^2}$

$R=883.74N$

7 0

3 years ago

I’m not sure what this is asking me to do?

Molodets [167]

Answer:

Step-by-step explanation:

-2 = 17

You need find what number that need to be in the blank spot

17 + 2 = 19

19 - 2 = 17

In the second question u need to find equal number

17 - 3 = 16 - 2

14 14

They need to be equal - =

19 - 6 = 18 - 5

13 13

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3 years ago

I need help with these two questions

Mandarinka [93]

Answer:

(-2,-2)

Step-by-step explanation:

for question number 15...cordinated grid shows each equation...first equation is represented by straight line going upwards through +4 in y axis...(y=3x+4)...

point is....every point in this two lines represent a possible x and y value for each equation...and there is a point where these lines meet each other....in that point...x and y values are possible values for both equations.so answer is (-2,-2)...this cordination satisfy each pairs of equation...you can try using -2 for x in both equations and get -2 as the answer for y...that proves the point..try it for 16 quiz.good luck

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3 years ago

Please help, I will give brainliest. I am struggling badly.

Aliun [14]

Answer:

ican you show the chart? then ill edit this to the answer

Step-by-step explanation:

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3 years ago