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Ber [7]
3 years ago
12

Brittany has 50 beads. 70% of the beads are gold. How many beads does Brittany have?

Mathematics
1 answer:
Ket [755]3 years ago
6 0

Answer: 35 gold beads and 15 non-gold beads

Step-by-step explanation:

70% of 50

.70×50 = 35

50 - 35 = 15

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3 years ago
What are the real zeros of x^3+4x^2-9x-36
Katyanochek1 [597]

Answer:

x = -4\\x = -3\\x = 3

Step-by-step explanation:

To find the real zeros you must match the function to zero and factor the expression.

We have a polynomial of degree 3.

We try to group the terms to perform the factorization

x ^ 3 + 4x ^ 2-9x-36 = 0\\\\x ^ 2(x + 4) - 9(x + 4) = 0

Now we take (x + 4) as a common factor

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If we have an expression of the form (a ^ 2-b ^ 2) we know that this expression is equivalent to:

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In this case

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So:

(x ^ 2 -9) = (x + 3)(x-3)

Finally:

x ^ 3 + 4x ^ 2-9x-36 = (x + 4)(x + 3)(x-3) = 0

The solutions are:

x = -4\\x = -3\\x = 3

6 0
3 years ago
If f(x)=4x-6 and g(x) =2x find f(x) •g(x)
slavikrds [6]
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