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Svetlanka [38]
2 years ago
8

DIRE NEED OF HELP, pleaseee help (not a lot of points sorry)

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

Answer:

C. Subtract 4 from both sides.

Step-by-step explanation:

You need the equation in the form x² + ax + b = 0 to then either try factoring or use the quadratic formula.

In order to achieve that, you need to first:

Subtract 4 from both sides.

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If x+y=9, and 8(x+3y)= 120, what is the value of x-y
Triss [41]

Answer:

3

Explanation:

Apply Multiplicative Distribution Law:

{x + y =9

{8x + 24y = 120

Reduce the greatest common factor on both sides of the equation.

{x + y = 9

{x + 3y = 15

Subtract the two equations: x + y - (x +3y) = 9 - 15

Remove paranthesis: x + y - x - 3y = 9 - 15

Cancel the unknown variables: y - 3y = 9 - 15

Combine like terms: -2y=9 - 15

Calculate the sum or difference: -2y = -6

Reduce the greatest common factor on both sides of the equation: y =3

Substitute one unknown quantity into the elimination: x + 3 = 9

Rearrange unknown terms to the left side of the equation: x = 9 - 3

Calculate the sum or difference: x = 6

Write the solution set of equations: {x = 6

                                                           {y = 3

Substitute: 6 - 3

Calculate the sum or difference: 3

Answer: 3

6 0
2 years ago
In the freshman class, 62% of the students take math, 49% take science, and 38% take both science and math. what percentage take
antoniya [11.8K]

we are given

62% of the students take math

so,

n(M)=62

49% take science

n(S)=49

38% take both science and math

n(M∩S)=38

now, we can use union formula

n(M∪S)=n(M)+n(S) -n(M∩S)

now, we can plug values

and we get

n(M∪S)=62+49 -38

n(M∪S)=73

so,

the percentage takes at least one science or math course is 73%..........Answer

8 0
3 years ago
Read 2 more answers
Question 3 plzzz thanks u
Troyanec [42]

Answer:

the pic is blank we can't see

Step-by-step explanation:

8 0
3 years ago
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A room contains 55 chairs arranged in rows. The number of rows is one more than twice the number of chairs per row. Find the num
miss Akunina [59]

Answer:

i believe its 27

Step-by-step explanation:25 times two= 50 27 times two= 54 +one more is 55. so it is 27

7 0
3 years ago
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How do I uses these
andrezito [222]

Answer:

um i dont know

Step-by-step explanation:

7 0
2 years ago
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