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Sunny_sXe [5.5K]
3 years ago
14

When 4(0.5x+2.5y-0.7x-1.3y+4)is simplified, what is the resulting expression?

Mathematics
2 answers:
ANTONII [103]3 years ago
4 0

Answer:

Resulting expression is - 0.8x + 4.8y +16.

Step-by-step explanation:

Given :  4(0.5x+2.5y-0.7x-1.3y+4).

To find  : what is the resulting expression.

Solution : We have given that  4(0.5x+2.5y-0.7x-1.3y+4).

First we will solve the parenthesis by combine like terms:

4( 0.5x - 0.7x +2.5y -1.3y +4).

4( - 0.2x + 1.2y +4).

Now distributes 4 over parenthesis's terms

- 0.8x + 4.8y +16

Therefore, Resulting expression is - 0.8x + 4.8y +16.

Wittaler [7]3 years ago
3 0
2x+10y-2.8x-5.2y+16=

-0.8x+4.8y+16

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horsena [70]

Answer:

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Step-by-step explanation:

1.1     Pull out like factors :

  2x - 20  =   2 • (x - 10)  

Equation at the end of step  1  :

Step  2  :

Equations which are never true :

2.1      Solve :    2   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

2.2      Solve  :    x-10 = 0  

Add  10  to both sides of the equation :  

                     x = 10  

One solution was found :

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3 years ago
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Step-by-step explanation:

6 0
3 years ago
The sum of the digits of a 2-digit number is 10. If 18 is added to the number, the digits of the new number are those of the ori
Aliun [14]

Answer:

46

Step-by-step explanation:

Let (ab) represent a number with a in the ten's position and b is the one's position.

This means (ab) actually has value of 10a+b.

We are given the sum of those digits of (ab) is 10; this means a+b=10.

It says if 18 is added to the number (ab), then the result is (ba).

So (ab) has value 10a+b and

(ba) has value 10b+a.

We are given then:

(ab)+18=(ba)

10a+b+18=10b+a

Subtract 10a on both sides:

b+18=10b+a-10a

Simplify:

b+18=10b-9a

Subtract b on both sides:

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Divide both sides by 9:

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Rearrange by commutative property:

2=-a+b

So the system of equations we want to solve is:

a+b=10

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0+2b=12

2b=12

Divide both sides by 2:

b=\frac{12}{2}

Simplify:

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If b=6 and a+b=10, then a=4.  a=4 since 4+6=10.

So the original number is (46).

18 more than 46 is 18+46=(64) which is what we wanted.

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kipiarov [429]

Answer:

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Answer:

420 inches

Step-by-step explanation:

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