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IrinaK [193]
2 years ago
15

The sum of two trinomials is 7x2 - 5x + 4. if one of the trinomials is 3x2 + 2x - 1, then what is the other trinomial?

Mathematics
1 answer:
Margarita [4]2 years ago
5 0

Answer:

  b.  4x^2 -7x +5

Step-by-step explanation:

When you know a sum and one of its contributors, you can find the other by subtraction. The other trinomial is ...

  (7x^2 -5x +4) - (3x^2 +2x -1)

  = (7 -3)x^2 +(-5 -2)x +(4 -(-1))

  = 4x^2 -7x +5 . . . . . matches B

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What Value of m will make this equation true? 3 (m - 5) + 8 = 7 - 1/2 (4m - 11)​
KatRina [158]

Answer:

m = 7.1

Step-by-step explanation:

3 (m -5) + 8 = 7 -1/2 (4m - 11)

So, what I did first was distribute the values in the parenthesis to get,

3m - 15 + 8 = 7 -2m -5.5

Now that we have the parenthesis taken care of we can do the simpler math,

3m - 23 = 7 -2m - 5.5

I just added the 15 and 8, so now I move the -5.5 to the opposite side by adding.

3m - 23 = 7 -2m -5.5

<u>        +5.5             +5.5</u>

3m - 28.5 = 7 - 2m

Here we can do the same with the -2m.

3m - 28.5 = 7 - 2m

<u>+2m                 +2m</u>

5m - 28.5 = 7

To get rid of the -28.5 I added it to the 7 getting an answer of,

5m - 28.5 = 7

<u>      + 28.5    +28.5</u>

5m = 35.5

Finally, divide 5m and 35.5 both by 5.

5m/5 = m

35.5/5 = 7.1

Answer: m=7.1

Sorry it's really long, but I hope this helps! Have a great day!

6 0
3 years ago
What is the volume of the box?
Agata [3.3K]
To find the volume of the box you have to do the formula for volume

the formula for volume is lxwxh aka length x width x height

so first you have to do 3/4 x 1/2

3/4 x 1/2 = 3/8

Next, you have to do 3/8 x 1/4

3/8 x 1/4 = 3/32

so the volume of the box is 3/32

HOPE THIS HELPS!!!
6 0
3 years ago
Read 2 more answers
Please answer this correctly
bonufazy [111]

Answer:

The dependent variable is m

Step-by-step explanation:

A dependent variable is dependent on an independent variable. This variable is dependent on other variable that are measured . The dependent variable are expected to change as a result of the manipulation of the independent variables. Usually as the experiments changes the independent variable the dependent variable are observed and noted.

The independent variable is unaffected by the other variable you are measuring. The independent variable represent a quantity that is been manipulated in an experiment.

According to the question Jenny works as a server at Jefferson restaurant . The more table she is assigned to serve the more money she earns during a shift.

The independent variable is the number of table Jenny served because this is what she has control over.

The dependent variable is the amount of money Jenny earns because the amount of money she earns is dependent on the number of tables she served . Therefore the dependent variable is m

7 0
3 years ago
Donnie has18 melons. Each melon weighs 3 pounds. How many pounds of melons does Donnie have in all? A. 6 pounds B. 11 pounds C.
pentagon [3]
18 x 3 = 54. So the correct answer is D. 54 pounds.
4 0
3 years ago
What is the answer to 6(y+2)-4=-10
Brilliant_brown [7]
6(y+2)-4=-10\\ \\6y+12-4=-10\\\\6y=-10-12+4\\\\6y=-18\ \ / :6\\ \\y=-3


5 0
3 years ago
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