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alex41 [277]
2 years ago
5

Pleaseeee helpppppppppp

Mathematics
1 answer:
Georgia [21]2 years ago
3 0

Answer:

A

Step-by-step explanation:

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What are the factors of 2x + 3x - 54? Select two options
tiny-mole [99]

Answer:

The answer: The factors are (2x-9) and (x+6).

The Problem:

Factor 2x^2+3x-54

Step-by-step explanation:

So I'm going to do trial factors using the choices to aid me.

Factored form for this problem if it exist will be in the form:

(mx+n)(kx+p).

In general this is what it would look like if we factored any quadratic in terms of x (given the quadratic is not prime but technically you could factor even over the complex numbers).

Let's look at:

(mx+n)(kx+p)

We want to choose k \text{ and } m such that when you multiply them you get 2.  Well those would have to be 2 and 1.

(2x+n)(x+p)

we want to choose n \text{ and } p such that when you multiply them you get -54. Based on the choices we want to get with -9 and 6, or 9 and -6. We don't know the order we want to choose it in either.

For example which of these would work:

(2x-6)(x+9)

(2x+6)(x-9)

(2x-9)(x+6)

(2x+9)(x-6)

We are going to consider only the outer and inner of FOIL since we already know the first times the first is 2x^2 and the last times the last is -54.

Let's test the first one:

(2x-6)(x+9)

Outer:  2x(9)=18x

Inner: -6(x)=-6x

------------------------ADD!

18x-6x=12x

The first choice did not give us the middle term 3x.

Trying the second one would give us the opposite since they are in the same form as previous just the + and - are switched.

Let's look at the third one:

(2x-9)(x+6)

Outer: 2x(6)=12x

Inner: -9(x)=-9x

--------------------------ADD!

12x-9x=3x

This is the winner.

The answer: The factors are (2x-9) and (x+6).

7 0
3 years ago
Read 2 more answers
What is the surface area of this square pyramid?
Viefleur [7K]

base = 3*3 = 9 sq. in.

 side = 1/2 *3*6 = 9 sq. in.

4 sides x 9 = 36 + 9 (base) = 45 in^2

 Answer is A

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3 years ago
Brandon has a garden in his backyard he picked 66 from six tomato plants what is the ratio of tomato plants two tomatoes picked
Tom [10]
11 Picked Off 6 Plants. 
8 0
3 years ago
Help please!! i added a picture.
tresset_1 [31]

Answer:

i think the answer is letter F

Step-by-step explanation:

hope this helps can i have brainly thing if so please

7 0
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A number between 55 and 101 that is a multiple of 2, 8, and 16
ch4aika [34]
Ànswer is 64 , 80, and 96
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