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kaheart [24]
3 years ago
8

Help me please i need help with this

Mathematics
1 answer:
solmaris [256]3 years ago
7 0
(2x +y)(5x-y+3)

10x^2 - 2xy + 6x + 5xy - y^2 + 3y

10x^2 -2xy+5xy + 6x - y^2 + 3y
 
10x^2 +3xy + 6x -y^2 +3y        

Looking at the answer boxes the sign looks wrong to me from y^2 ( a negative times a positive is a negative) I may be wrong. 

Anyone else?
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Donna has ridden 28 miles of a bike course. The course is 35 miles long. What percentage of the course has Donna ridden so far?​
ZanzabumX [31]

Answer:

Use a calculator to divide the two values (small over big) to get 14/35 = 0.4

Now multiply that result by 100 to convert to a percentage

0.4*100 = 40%

he has ridden 40% of the course so

7 0
2 years ago
Help!! <br> Solve for v. <br> 14v - 10 = 14v
SashulF [63]

Answer:

sln

14v-10=14v

14v-14v=10

the Value of v don't get because when 14v-14v is equal to zero

6 0
2 years ago
(1 point)
san4es73 [151]

Answer:

Step-by-step explanation:

2x - 9y = 23

5x - 3y = -12x - 9y = 23

5x - 3y = -1

7 0
3 years ago
Can someone plz help me with this
Levart [38]
D.
None of the above. Because your expression would be, 2 + 0.75 x 6.
Hope it helps. ;)
7 0
3 years ago
there are 16 bactiria in a beaker and four hours later there are 228 bacteria in the beaker. what is the rate of change per hour
Dominik [7]

Write and solve the appropriate exponential equation:

228 = 16(r)^4, where r is the change per hour in the number of bacteria:

228

------ = r^4     =   14.25.  

 16

Taking the fourth root of both sides, we get:  r = 1.94 (answer)

8 0
3 years ago
Read 2 more answers
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