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gogolik [260]
3 years ago
14

Please help it's greatly apprecatied

Mathematics
1 answer:
Gala2k [10]3 years ago
3 0

Answer:

Step-by-step explanation: A on edge

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Simplify the given expression. (16x^2 + 15xy – 19y^2) – (3x^2 – 3xy)
ruslelena [56]

Answer:

-19 y^2 + 18 x y + 13 x^2

Step-by-step explanation:

Simplify the following:

16 x^2 + 15 x y - 19 y^2 - (3 x^2 - 3 x y)

Factor 3 x out of 3 x^2 - 3 x y:

16 x^2 + 15 x y - 19 y^2 - 3 x (x - y)

-3 x (x - y) = 3 x y - 3 x^2:

16 x^2 + 15 x y - 19 y^2 + 3 x y - 3 x^2

Grouping like terms, 16 x^2 + 15 x y - 19 y^2 - 3 x^2 + 3 x y = -19 y^2 + (15 x y + 3 x y) + (16 x^2 - 3 x^2):

-19 y^2 + (15 x y + 3 x y) + (16 x^2 - 3 x^2)

x y 15 + x y 3 = 18 x y:

-19 y^2 + 18 x y + (16 x^2 - 3 x^2)

16 x^2 - 3 x^2 = 13 x^2:

Answer:  -19 y^2 + 18 x y + 13 x^2

4 0
3 years ago
Read 2 more answers
Dia loves to drink hot chocolate in the morning. Her dad makes the hot chocolate the same way each day. He uses 3 ounces of choc
Elden [556K]

Answer:

9 ounces

Step-by-step explanation:

He uses 3 ounces 3 different days. That is 3x3 which equals 9. Hope you get a 100! :)

8 0
3 years ago
Given the equation 2x = 4y - 3 write another linear equation that would create a system that has the number of solutions listed
Harman [31]

Answer:

A. 2x-4y=\pi
B.  x=1

C. 2x-4y=3

Step-by-step explanation:

A. 2x-4y=\pi. Any number could work as long as the coefficients for x and y stays the same. You are basically imposing that the quantity 2x-4y (if you bring 4y to the LHS) is equal to both -3 AND \pi, or any number you like. But yesterday was 3/14 so let's pick a fun number!

B.  x=1 Or y=1. Or as long as you don't pick the same ratios of x and y you're golden. But x=1 is the easiest that comes to mind

C. 2x-4y=3. To get infinitely many solutions you just have to rewrite the equation again. Maybe move things around if you prefer, or multiply everything by a number you lile.

7 0
2 years ago
2<br> 6-2___ help please <br> 7<br> (30points)
serg [7]
6 - 2 2/7 = 
6 - 16/7 =
42/7 - 16/7 =
26/7 or 3 5/7
8 0
3 years ago
Read 2 more answers
Juan bought 4.5 lbs of coffee for $7.98 per lb. Sales tax is 6%. What was the total amount Juan paid for the coffee?
Nataly_w [17]

Answer:

the amount he paid is 36.06

Step-by-step explanation:

hope this helps

7 0
3 years ago
Read 2 more answers
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