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kogti [31]
3 years ago
9

Simplify the given expression. 10(0.4x+0.2y)+21(0.6x−0.8y)

Mathematics
2 answers:
Irina18 [472]3 years ago
5 0

Answer:

16.6 x − 14.8 y

Step-by-step explanation:

10 ( 0.4 x + 0.2 y ) + 21 ( 0.6 x − 0.8 y )  :

Simplify each term.  

4 x + 2y + 12.6 x − 16.8 y

Simplify by adding terms.

Add 4 x  and  12.6 x .

16.6 x + 2 y − 16.8 y

Subtract 16.8 y  from  2 y .

16.6 x − 14.8 y.

Delvig [45]3 years ago
3 0

Answer:

your answer would be

Step-by-step explanation:be (0.6x-0.8y)

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Sandra saves 7% of her salary for retirement. This year her salary was $2,000 more than her salary than in the previous year, an
Effectus [21]

9514 1404 393

Answer:

  • 2,000
  • $45,000

Step-by-step explanation:

Where x represents the previous year's salary, its amount this year is said to be ...

  x + 2000

The equation is trying to reflect the fact that 7% of that is $3,290. The missing number is 2000:

  0.07(x +2000) = 3290

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Solving for x, we find ...

  x = (3290/0.07) -2000 = 45000

Sandra's salary the previous year was $45,000.

3 0
2 years ago
BRAINLIESTT ASAP! PLEASE HELP ME :)
Maslowich

Step-by-step explanation:

\displaystyle y = Asin(Bx - C) + D

According to this trigonometric function, −C gives you the OPPOSITE terms of what they really are, so be EXTREMELY CAREFUL:

\displaystyle Phase\:[Horisontal]\:Shift → \frac{0}{\frac{1}{7}} = 0 \\ Period → \frac{2}{1}π = 2π

Therefore we have our answer.

Extended Information on the trigonometric function

\displaystyle Vertical\:Shift → D \\ Phase\:[Horisontal]\:Shift → \frac{C}{B} \\ Period → \frac{2}{B}π \\ Amplitude → |A|

NOTE: Sometimes, your <em>vertical shift</em> might tell you to shift your graph below or above the <em>midline</em> where the amplitude is.

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3 0
3 years ago
The set of natural numbers x that satisfy x + 8 = 5
Maksim231197 [3]

Answer:

The set of natural numbers can be denoted as: {} (null set) because no natural number will satisfy the given equation.

Step-by-step explanation:

Given equation:

x+8=5

To find the set of natural numbers that satisfies the above equation.

Solution:

In order to find the set of solutions for the equation, we will solve it for x

We have:

x+8=5

Subtracting both sides by 8.

x+8-8=5-8

∴ x=-3

Thus, we get only one solution for x that satisfies the given equation but it is not a natural number. -3 is an integer.

Set of natural numbers {1,2,3,4,5,6........}

Thus, we can say the set of natural numbers that satisfies the equation is a null set {}.

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3 years ago
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Dimas [21]

Sorry i messed up at first i think it actually is 50.3

Step-by-step explanation:

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2 years ago
FILL IN THE BLANK:
faust18 [17]

Answer:

reverse

Step-by-step explanation:

When you multiply or divide on one side of an inequaltiy, you have to mirror it on the other side and you have to reverse the inequality sign.

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