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3 years ago

Which of the following is a factor of 2x^2–7x–15 2x–3 x–5 2x–5 x–3

Mathematics

1 answer:

Andreas93 [3]3 years ago

4 0

double bracket factorisation

2 × 15 = 30

find two factors of 30 that add to give -7

(-10, +3)

2x^2 -10x + 3x - 15

2x(x-5) + 3 (x-5)

(2x+3) (x-5)

THE ANSWER IS X-5

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Simplify fully 2x power two + 9x + 10 ÷ 2x+5 pls need answer quickly

Lunna [17]

Answer:

2x^2+14x+5

Step-by-step explanation:

x^2+9x+5x+5

Combine Like Terms:

=2x^2+9x+5x+5

=(2x^2)+(9x+5x)+(5)

=2x^2+14x+5

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3 years ago

If there is 3 cars and you add 4 and take any 5 how many are left at the dealership

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Step-by-step explanation:

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2 years ago

Identify the variable in: 7h + 3

7nadin3 [17]

Isn’t it h?

extra words so i can actually post this reply

3 0

3 years ago

Read 2 more answers

1. f(x) = x2 - 21 f(5)

matrenka [14]

Answer:

x=13

Step-by-step explanation:

if you will substitute the value of f(x) with 5, you will get the following equation:

5=2x-21

2x=26/÷2

x=13

(I didn't know what you ment when you wrote x2, is it x square or 2X)

I really hope it was the second one, cause that's how I solved it.

8 0

3 years ago

10 points

ollegr [7]

Answer:

$FC=25.9$

Step-by-step explanation:

Congruent Triangles

The figure shows two triangles FCD and FED. One of their sides is the radius of the circle, they both form a 90° angle with the line CD and ED and they share the same segment FD.

Thus, both triangles are congruent and we have the length of a side (12 units), one common side (the hypotenuse) and one unknown leg that must be equal. Therefore

$13x-16=4x+11$