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aliina [53]
3 years ago
11

Which expression is equivalent to this polynomial? 6x2 + 10x − 56=

Mathematics
2 answers:
Semmy [17]3 years ago
7 0

Step-by-step explanation:

A 4x - 16 - 6x2 - 6x + 40

Solving like terms

-6x2 - 2x + 24

B 3x2 + 5x - 28 + 3x2 - 5x - 28

Solving like terms

6x2 - 64

C 4x - 16 + 6x2 + 6x - 40

Solving like terms

6x2 + 10x - 56

Option C is the correct answer

hammer [34]3 years ago
4 0
2nd one maybe I’m not to sure srry
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How do I solve these problems? ln(x) = 5.6 + ln(7.5) and log(x) = 5.6 - log(7.5)
SOVA2 [1]

Use the rules of logarithms and the rules of exponents.

... ln(ab) = ln(a) + ln(b)

... e^ln(a) = a

... (a^b)·(a^c) = a^(b+c)

_____

1) Use the second rule and take the antilog.

... e^ln(x) = x = e^(5.6 + ln(7.5))

... x = (e^5.6)·(e^ln(7.5)) . . . . . . use the rule of exponents

... x = 7.5·e^5.6 . . . . . . . . . . . . use the second rule of logarithms

... x ≈ 2028.2 . . . . . . . . . . . . . use your calculator (could do this after the 1st step)

2) Similar to the previous problem, except base-10 logs are involved.

... x = 10^(5.6 -log(7.5)) . . . . . take the antilog. Could evaluate now.

... = (1/7.5)·10^5.6 . . . . . . . . . . of course, 10^(-log(7.5)) = 7.5^-1 = 1/7.5

... x ≈ 53,080.96

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3 years ago
Solve the system by elimination
andreev551 [17]
The answer is x=5 and y=-2

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3 years ago
1 3/4 x 1 1/3 give your answer as a mixed number
WARRIOR [948]

Answer:

2 1/3

Step-by-step explanation:

1 3/4  is equivalent to 7/4

1 1/3 is equivalent to 4/3

7/ 4 x 4/3

reduce with greatest common factor so the two 4 are out (show a line crossing out the top and bottom 4 )

now you're left with 7 x 1/3 = 7/3

7/3 = 2 1/3

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OLEGan [10]

Answer:

Step-by-step explanation:

loose (8+5) yards so they lost 13 yards

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