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2 years ago

How do I solve a system of equation? Can someone explain it to me?

Mathematics

1 answer:

Fantom [35]2 years ago

6 0

Need more detail to solve

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X - 6 = 5x – 2 help

KiRa [710]

Answer:

-6+2=5x-x

-4=4x

-4/4=X

0=x

8 0

2 years ago

Joe is building a post for his mailbox. To find the correct dimensions, he needs to expand this expression: (x-3) (x-9) (x-4) Se

kolbaska11 [484]

Answer:

$(x-3)(x-9)(x-4)=x^3-16x^2+75x-108$

Step-by-step explanation:

Given:

The expression to expand is given as:

$(x-3)(x-9)(x-4)$

Let us expand the first two binomials of the given expression using FOIL method.

The FOIL method states that:

$(a + b)(c + d) = ac + ad + bc + bd$

$(x-3)(x-9)=(x\times x)+(x\times -9)+(-3\times x)+(-3\times -9)\\\\(x-3)(x-9)=x^2-9x-3x+27=x^2-12x+27$

Now, let us multiply the result with the remaining binomial. Multiplying each term of the trinomial with each term of the binomial, we get:

$(x^2-12x+27)(x-4)\\\\= (x^2\times x)+ (x^2\times -4)+(-12x\times x)+(-12x\times -4)+(27\times x)+(27\times -4)\\\\=x^3-4x^2-12x^2+48x+27x-108\\\\=x^3-16x^2+75x-108...........(\because-12x^2-4x^2=-16x^2,48x+27x=75x)$

Therefore, the equivalent expression after expanding is given as:

$(x-3)(x-9)(x-4)=x^3-16x^2+75x-108$

3 0

2 years ago

U(x)=x-1 W(x)=2x^2-2 (U.w)(1)= (W•u)(1)=

Kryger [21]

Answer: I really don’t know lol

Step-by-step explanation:

8 0

2 years ago

Evaluate -8a - b if a = 10 and b = 6

ss7ja [257]

The answer is -86 .....

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2 years ago

Why is it preferable to measure a penny in millimeters rather than centimeters or meters?

andrey2020 [161]

Pennies are small so, if would be more accurate and have whole numbers. If u measured with an inch or meter, u would get a fraction for an answer.

8 0

2 years ago

Read 2 more answers