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ollegr [7]
3 years ago
7

Who can help me solve this math problem? -4y+7y^2+7x-x+3y+x-4y

Mathematics
2 answers:
Sergio [31]3 years ago
5 0

Hope it will help u...........

krok68 [10]3 years ago
3 0

Sum up the like terms :

  • -4y + 7y² + 7x - x + 3y + x - 4y

  • 7y² + (-4y + 3y - 4y) + (7x - x + x)

  • 7y² - 5y + 7x
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Mary takes a sightseeing tour on a helicopter that can fly 450 miles against a 35 mph headwind. In the same amount of time it ca
monitta

Answer:

V = 160mph

Step-by-step explanation:

We need to start from the formula of speed: V=d/t

We have two travels, with and against the wind, both done in the same time.

Clearing t from the formula, we will have: t=d/V2

450miles/V-35mph (speed of the wind is subtracted)

702miles/V+35mph (speed of the wind is subtracted)

Now, we find V:

450miles/V-35mph = 702miles/V+35

450*V+35 = 702*V-35

450V+15,750 = 702V-24,570

702V-450V = 15,750 + 24,570

252V = 40,320

V = 40,320/252

V = 160mph

5 0
4 years ago
If 8 = x + y and y > 0, then x is ___ 8.
const2013 [10]
If y>0 then y has to be 1 or more so

8= x+y 

8= x + 1

-1

7= x

so x is < 8

Answer is A
4 0
4 years ago
Read 2 more answers
There are 9 quilts with 18 yards . How many yards would be required for 10
pychu [463]
Hello!

First, you set up a proportion : quilts / yards = 9 / 18 = 10 / x
Then, you solve for x.

x = 20


Hope this helps! If you have any further concerns, feel free to let me know!

8 0
3 years ago
Matty jogs 9 km/hr. Compute Matty's speed in m/s.
REY [17]

Answer:

=9 * 1000 / 3600

=9000 / 3600

=2.5m/s

note that 1000m makes 1km and 3600seconds make an hour

Step-by-step explanation:

7 0
4 years ago
A random sample of students were asked whether they prefer milk juice or water is it results are summarized in the table.
kramer

Answer:

C

Step-by-step explanation:

8 0
3 years ago
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