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murzikaleks [220]
3 years ago
9

Exponent rules . Simplify each expression . HELPPP pls on these 2 problems

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
8 0

Step-by-step explanation:

Please refer to the attachment

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Evaluate 3x2 - 4 when χ= 2.<br> Α. 2<br> Ο Ο Ο<br> Ο Β. 8<br> C. 12<br> Ο D. 32
solniwko [45]

Answer:

D. 32.

Step-by-step explanation:

3x^2 - 4\\= 3^2 * 2\\= 6^2 - 4\\= 36 - 4\\= 32.

hope this helps.

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2 years ago
I need helpppppppp I don’t like remainders :/
den301095 [7]

Answer:

The correct answer is 67 9/11

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What expression is equivalent to -15x + 39? *
Nookie1986 [14]

Answer:

-15x + 39 = -3(5x - 13)

Step-by-step explanation:

a. -3(5x - 13) = -15x + 39

b. -3(5x + 13) = -15x - 39

c. 3(5x - 13) = 15x - 39

d. 3(5x + 13) = 15x + 39

7 0
2 years ago
Could someone help me for this?
lina2011 [118]

Answer:

x = - \frac{5}{3} , x = \frac{5}{2}

Step-by-step explanation:

to find the points of intersection equate the 2 equations , that is

7x - 15 = 10 + 12x - 6x² ( subtract 10 + 12x - 6x² from both sides )

6x² - 5x - 25 = 0 ← factor the quadratic on left side

consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term

product = 6 × - 25 = - 150 and sum = - 5

the factors are - 15 and + 10

use these factors to split the x- term

6x² - 15x + 10x - 25 = 0 ( factor the first/second and third/fourth terms )

3x(2x - 5) + 5(2x - 5) = 0 ← factor out (2x - 5) from each term

(2x - 5)(3x + 5) = 0

equate each factor to zero and solve for x

3x + 5 = 0 ⇒ 3x = - 5 ⇒ x = - \frac{5}{3}

2x - 5 = 0 ⇒ 2x = 5 ⇒ x = \frac{5}{2}

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2 years ago
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3 years ago
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