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Zigmanuir [339]
3 years ago
14

In which situation would you most likely factor out -1 from a trinomial?

Mathematics
2 answers:
yanalaym [24]3 years ago
8 0

B) when the coefficient of x^2 is negative

Aleonysh [2.5K]3 years ago
4 0

Answer:

  when the coefficient of x^2 is negative

Step-by-step explanation:

Suppose if we have a trinomial  x^2 - 5x+6

We can factor this trinomial by finding two factors whole product is +6 and add upto -5

Suppose we have a trinomial -x^2 +5x-6

Here factoring is not possible directly

so we need to factor out  negative from x^2

To factor any trinomial x^2 should be positive

So we factor out -1 when the coefficient of x^2 is negative

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4/7 of the children in a pool are girls. What is the ratio of girls to boys?
marshall27 [118]
4/7 of the children in the pool are girls 
3/7 of the children in the pool are boys
4/7:3/7
4:3 is the ratio of girls to boys
6 0
3 years ago
3) A semicircle is attached to the side of a rectangle as shown.
m_a_m_a [10]
Rectangle = 18 x 6 = 108
Circle:  3.14 x (3)^2 = 3.14 x 9 = 28.26
<span>semicircle: 28.26 / 2 = 14.13
</span>
108 + 14.13 = 122.13

answer
122.13 cm^2

3 0
3 years ago
Read 2 more answers
15 points work out ratio for x
BlackZzzverrR [31]

Answer:

x = 25

Step-by-step explanation:

x : (x+10) = 5:7

Fractional form

x / x+10 = 5/7

Cross multiply:

x * 7 = (x+10) * 5

7x = 5x + 50

7x - 5x = 5x + 50 - 5x

2x = 50

x = 25

Check:

25 : 25 + 10

25 : 35

25/35 = 5/7

If my answer is incorrect, pls correct me!

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-Chetan K

7 0
3 years ago
Find the simultaneous equation x-2y=1,y^2-3xy+8=0​
Hitman42 [59]

Answer:

  (-2.2, -1.6), (3, 1)

Step-by-step explanation:

You don't have to go far to find the equations. They are right there in your problem statement. Perhaps you want to find the solutions to the equations.

Use the first equation to write an expression for x, then substitute that into the second equation:

  x = 2y +1

  y^2 -3(2y+1)(y) +8 = 0

  -5y^2 -3y +8 = 0

  -(5y +8)(y -1) = 0

  y = -8/5   or   y = 1

The corresponding values of x are ...

  x = 2(-8/5)+1 = -11/5

  x = 2(1) +1 = 3

The solutions are (x, y) = (-2.2, -1.6) and (3, 1).

5 0
2 years ago
Solve in(5x+7)=8 round to the nearest thousandth
Ivan

Answer:

x=\frac{1}{5}

x=0.2

Step-by-step explanation:

(5x+7)=8

5x+7=8

Subtract 7 from both sides.

5x+7-7=8-7

Simplify.

5x=1

Divide both sides by 5.

\frac{5x}{5} =\frac{1}{5}

Simplify.

x=\frac{1}{5}

Decimal form:

0.2

7 0
3 years ago
Read 2 more answers
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