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mina [271]
2 years ago
8

Write the expression as a trinomial (5c+2)(2c-1)

Mathematics
2 answers:
blsea [12.9K]2 years ago
7 0

Answer:

10c^2-c-2

Step-by-step explanation:

FOIL method

or just multiply all of the numbers by each other, if you get 4 numbers you did it right then simplify;

(5c+2)(2c-1) 5c*2c; 2*-1; -1*5c; 2*2c = 10c^2, -2, -5c, 4c, simplify, 10c^2 -c -2. Hope this helps :)

Tanya [424]2 years ago
4 0

Answer:

10c² - c - 2

Step-by-step explanation:

(5c+2)(2c-1)

10c² - 5c + 4c - 2

10c² - c - 2

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3 years ago
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What is the probability of selecting a seventh-grader from a school that has 250 sixth-graders, 225 seventh-graders, and 275 eig
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Answer:

3/10 or 0.3 or 30%

Step-by-step explanation:

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3 0
3 years ago
Let $r$ and $s$ be the roots of $3x^2 + 4x + 12 = 0.$ Find $r^2 + s^2.$ Pls help.
nirvana33 [79]

Answer:

-56/9

Step-by-step explanation:

By Vieta's formulas,

$r + s = -\frac{4}{3}$ and $rs = \frac{12}{3} = 4.$ Squaring the equation $r + s = -\frac{4}{3},$ we get

$r^2 + 2rs + s^2 = \frac{16}{9}.$ Therefore,

$r^2 + s^2 = \frac{16}{9} - 2rs = \frac{16}{9} - 2 \cdot 4 = -\frac{56}{9}}$

5 0
3 years ago
From the yearbook receipts the students council deposited apart of the $1200 in a saving account receiving 9% interest per annum
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88 = x(0.09)(1) + (1200-x)(0.04)(1)
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Subtract 48 from both sides:
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Divide both sides by 0.05:
40/0.05 = 0.05x/0.05
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3 years ago
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