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Delvig [45]
3 years ago
13

What is the value of the expression:5m-2n when m=3 and n=5?

Mathematics
2 answers:
shepuryov [24]3 years ago
7 0

Answer:

5

Step-by-step explanation:

5m - 2n

Where, we have given ; m = 3 & n = 5

plug the value in the equation

  • = 5( 3 ) - 2 ( 5 )
  • = 15 - 10
  • = 5
Paul [167]3 years ago
3 0

9514 1404 393

Answer:

 5

Step-by-step explanation:

Put the numbers where the letters are and do the arithmetic.

  5(3) -2(5) = 15 -10 = 5

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4 times x with an exponent of 2 plus 2 times y with an exponent of 4. X=-3 y=2
Digiron [165]

Answer:

Step-by-step explanation:

Your equation is: 4*x^{2} +2 * y^{4}

You also know that x = -3 and y = 2. You can rewrite the equation by substituting x and y with their actual values:

4*(-3)^{2} +2 * 2^{4}

First, you want to do the exponentiation (meaning you want to calculate (-3)^{2} and 2^{4} parts). (-3)^{2} equals 9 and 2^{4} equals 16.

So the equation now is:

4*9+2*16

Now you want to do multiplication. 4*9 equals 36 and 2*16 equals 32. So you're left with:

36+32

Which equals 68.

8 0
3 years ago
3. Solve each inequality and graph the solution set.<br>– 3n-3&gt; 12​
Svetach [21]

x<-5

Step-by-step explanation:

-3x<12+3

3x>15 divide both sides with ÷3

x<-5

XE(-œ,-5)

5 0
3 years ago
PLEASE ANSWER QUICK IT IS EASY!!!!!!!!!!!!! A student took 75 minutes to answer a combination of 30 multiple-choice and extended
GenaCL600 [577]

Answer:

What is the question? there is only statement.

5 0
3 years ago
30 point for this plz help!! And explain how you got you answer
ch4aika [34]

To find the sales price of the DVD, you would multiply the price and sale percent to get the sale price.

You would need to turn 20% into a decimal to multiply it with 9, so you would move the decimal place two times to the left: From 20. to→ .20

In this case: 9 × .20 = 1.8

Then you would subract the sub price by the sales price

9 - 1.8 = 7.2

The sales price of the DVD would be $7.20

4 0
3 years ago
Read 2 more answers
A ball with mass m kg is thrown upward with initial velocity 28 m/s from the roof of a building 17 m high. Neglect air resistanc
Nutka1998 [239]

a. At its maximum height, the ball has zero vertical velocity, so

-\left(28\dfrac{\rm m}{\rm s}\right)^2=2(-g)(y_{\rm max}-17\,\mathrm m)

\implies y_{\rm max}=57\,\mathrm m

b. The ball's height in the air y at time t is given according to

y=17\,\mathrm m+\left(28\dfrac{\rm m}{\rm s}\right)t-\dfrac g2t^2

Solve for t when y=0:

17+28t-4.9t^2=0\implies t\approx6.3\,\mathrm s

3 0
3 years ago
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