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dmitriy555 [2]
4 years ago
6

What is the value of y=4x−2 when x=3 ?

Mathematics
2 answers:
MariettaO [177]4 years ago
7 0

Answer:

y = 10

Step-by-step explanation:

y = 4(3) - 2

y = 12 - 2

y = 10

Roman55 [17]4 years ago
7 0

Answer:

10

Step-by-step explanation:

plug the 3 in and multiply it by the 4. subtract the 2 and thats it!

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A car traveled 385 miles in 7 hours.It traveled the same number of miles each hour.If the car continues at the same number of mi
Crazy boy [7]

Answer:

880

Step-by-step explanation:

385/7=55x16=880

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4 years ago
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Evaluate the integral by interpreting it in terms of areas Draw a picture of the region the integral
denis23 [38]

Answer:

Step-by-step explanation:

The picture is below of how to separate this into 2 different regions, which you have to because it's not continuous over the whole function. It "breaks" at x = 2. So the way to separate this is to take the integral from x = 0 to x = 2 and then add it to the integral for x = 2 to x = 3. In order to integrate each one of those "parts" of that absolute value function we have to determine the equation for each line that makes up that part.

For the integral from [0, 2], the equation of the line is -3x + 6;

For the integral from [2, 3], the equation of the line is 3x - 6.

We integrate then:

\int\limits^2_0 {-3x+6} \, dx+\int\limits^3_2 {3x-6} \, dx    and

-\frac{3x^2}{2}+6x\left \} {{2} \atop {0}} \right.  +\frac{3x^2}{2}-6x\left \} {{3} \atop {2}} \right.  sorry for the odd representation; that's as good as it gets here!

Using the First Fundamental Theorem of Calculus, we get:

(6 - 0) + (-4.5 - (-6)) = 6 + 1.5 = 7.5

5 0
3 years ago
What is the volume of the cylinder?
AVprozaik [17]
V_{cylinder}= \pi r^2 l
8 0
3 years ago
A train travels a distance of 60 km at uniform speed. If the speed of the train was reduced by 10 kmh-1, the time taken to trave
tester [92]

Answer:

<u>Initial</u><u> </u><u>speed</u><u> </u><u>is</u><u> </u><u>3</u><u>2</u><u> </u><u>m</u><u>/</u><u>s</u>

At uniform speed, acceleration is 0, (a = 0).

When speed reduced, (v - u) = 2.78 ms-¹, t = 1800 sec, s = 60 ,000 metres.

From first equation of motion:

{ \boxed{ \bf{v = u + at}}} \\  { \tt{(v - u) = at}}

substitute:

{ \tt{2.78 = (a \times 1800)}} \\ { \tt{acceleration = 0.0015 \:  {ms}^{ - 2} }}

from second equation of motion:

{ \boxed{ \bf{s = ut +  \frac{1}{2} a {t}^{2} }}}

substitute:

{ \tt{60000 = 1800u + ( \frac{1}{2} \times 0.0015 \times  {1800}^{2})  }} \\ { \tt{1800u = 57570}} \\ { \tt{u = 32 \: m {s}^{ - 1} }}

5 0
3 years ago
What is the value of 6x+7y-5 when x =2 and y=3​
77julia77 [94]

Answer:

28

Step-by-step explanation:

  • 6(2) + 7(3) - 5
  • 12 + 21 - 5
  • 33 - 5
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