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3 years ago

12

Doug had about $3,215 in savings while his brother had double that amount in savings. What is a reasonable amount that the broth

ers have saved?

2 answers:

love history [14]3 years ago

8 0

You would have to first multiply 3215x2 then you get the answer and then you add 3215 +3215x2

MaRussiya [10]3 years ago

5 0

Answer: i think you would have to multiply

Step-by-step explanation:

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3 years ago

It snowed 72 cm in 24 hours

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Step-by-step explanation:

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3 years ago

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fiasKO [112]

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3 years ago

If x+3 is a factor of x^3-x^2-10x+A. What is the value of A?

Leno4ka [110]

Answer:

$A = 6$ .

Step-by-step explanation:

Let $a$ denote a constant (a number, rather than a variable like $x$ .)

Let $f(x)$ denote an expression about $x$ (for example,

By the factor theorem, if $(x - a)$ is a factor of $f(x)$ , then $f(a) = 0$ . In other words, if all mentions of $x$ in the expression $f(x)\!$ are replaced with $a$ , then the expression should evaluate to zero.

$(x + 3)$ is equivalent to $(x - (-3))$ . That is: $a = -3$ .

Replace all mentions of $x$ in $x^3 - x^2 - 10\, x + A$ by $(-3)$ to get:

$(-3)^3 - (-3)^2 - 10\times (-3) + A$ .

That should evaluate to zero. Therefore: $-27 - 9 + 30 + A = 0$ . Solve for $A$ to get $A = 6$ .

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3 years ago

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The answer to this question is D. 14

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3 years ago

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