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IgorLugansk [536]
4 years ago
11

Simpliest expression for (12.7y-3.1x)+5.9y-(4.2y-x)

Mathematics
1 answer:
Blababa [14]4 years ago
7 0

Answer:

  -2.1x +14.4y

Step-by-step explanation:

Use the distributive property to eliminate parentheses. Then combine like terms.

  (12.7y-3.1x)+5.9y-(4.2y-x)

  = 12.7y -3.1x +5.9y -4.2y +x

  = x(-3.1 +1) +y(12.7 +5.9 -4.2)

  = -2.1x +14.4y

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Please Help! :) <br> Solve for X. The polygons in each pair are similar.
Diano4ka-milaya [45]

Answer:

x=2.65

Step-by-step explanation:

First, we need to figure out how much the length of the sides is changing between the equations. In this case it is changing by a factor of 2.5. Now we need to work backwards. First use this equation:

4x-5*2.5=14

This is because whatever the length of the side with x is, will be 14/2.5. So divide both sides by 2.5:

4x-5=5.6

Next, add 5 to both sides:

4x=10.6

Then divide both sides by 4:

x=2.65

8 0
3 years ago
Dan borrowed $750.00 from his brother who is charging him 8% simple interest. If Dan pays his brother back in 6 months, how much
Artemon [7]

Solution:

we are given that

Dan borrowed $750.00(=P) from his brother who is charging him 8% (=r)simple interest.

Dan pays his brother back in 6 months(=t).

we have been asked to find- how much does he have to pay back including the interest?

As we know that

(Simple \ Interest)SI=\frac{PRT}{100}

Substitute the values we get

SI=\frac{750*8*1/2}{100}= 30\\

Hence net payable amount is 750+30=$780


8 0
3 years ago
Read 2 more answers
!!!Write the equation of the line that passes through the point (-4, 6) and (1,1).
miv72 [106K]
First, find the slope of the given points (m = y2 - y1 / x2 - x1)
m = (6-1) / (-4-1) = 5/-5 = -1
Then substitute the slope and the coordinates of either point for x and y into y = mx + b, we’ll use (-4,6)
6 = (-1)(-4) + b
Solve for b
6 = 4 + b, subtract 4 from both sides: b = 2
Rewrite y = mx + b with m = -1 and b = 2
Equation: y = -1x + 2 or y = -x + 2
6 0
3 years ago
Ahh, I need help again. I’m really bad at math. Someone please help me.
Reil [10]

The answer is 8% because each rate (2%) goes up $200, making $1200 at 6% into $1800 at 8%.

Hope this helps!

6 0
4 years ago
The sum of three guys ages is 62. Angelo is two years younger than Aaron and Alfred is four years older than twice Aaron's age.
marishachu [46]

Answer: Angelo is 13 years old.

Aaron is 15 years old

Alfred is 34 years old

Step-by-step explanation:

Let x represent the age of Angelo.

Let y represent the age of Aaron.

Let z represent the age of Alfred

The sum of three guys ages is 62. It means that

x + y + z = 62 - - - - - - - - - - -1

Angelo is two years younger than Aaron. It means that

x = y - 2

Alfred is four years older than twice Aaron's age. It means that

z = 2y + 4

Substituting x = y - 2 and z = 2y + 4 into equation 1, it becomes

y - 2 + y + 2y + 4 = 62

4y + 2 = 62

4y = 62 - 2 = 60

y = 60/4 = 15

x = y - 2 = 15 - 2

x = 13

z = 2y + 4 = 2 × 15 + 4

z = 34

6 0
4 years ago
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