Please help me with these questions

Mathematics

1 answer:

Gnoma [55]3 years ago

7 0

1. -(6)^-1 = -1/6

2. -4.7^0 = 1

3. -1/p^-6 = -p^6

4. 4^6 × 4³ = 4^9

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Which expressions are equivalent to 10a - 25 + 5b

sergey [27]

Answer:

Step-by-step explanation:

$10a-25+5b\\\\-2(-5a-25+5b)=(-2)(-5a)+(-2)(-25)+(-2)(5b)\\=10a+50-10b\qquad NOT\\\\(2a-5+b)(5)=(2a)(5)+(-5)(5)+(b)(5)=10a-25+5b\qquad YES\\\\10(a-2.5+0.5b)=(10)(a)+(10)(-2.5)+(10)(0.5b)\\=10a-25+5b\qquad YES\\\\(-2a+5-b)(-5)=(-2a)(-5)+(5)(-5)+(-b)(-5)\\=10a-25+5b\qquad YES\\\\-10(-a-2.5-0.5b)=(-10)(-a)+(-10)(-2.5)+(-10)(-0.5b)\\=10a+25+5b\qquad NOT$

5 0

3 years ago

Find the value of each variable in the parallelogram. Round your answers to the nearest tenth, if necessary.

lilavasa [31]

Answer:

z = 2

y = 5

Step-by-step explanation:

3 0

2 years ago

Simplify 4х+ 2-

exis [7]

Answer:

3x - 2

Step-by-step explanation:

$4x + 2 - \frac{ {x}^{2} + x - 12}{x - 3} \\ \\ = 4x + 2 - \frac{ {x}^{2} + 4x - 3x- 12}{x - 3} \\ \\ = 4x + 2 - \frac{ {x}(x + 4) - 3(x + 4)}{x - 3} \\ \\ = 4x + 2 - \frac{ (x + 4) \cancel{(x- 3)}}{\cancel{(x- 3)}} \\ \\ = 4x + 2 - (x + 4) \\ \\ = 4x + 2 - x - 4 \\ \\ = 4x - x + 2 - 4 \\ \\ = 3x - 2$

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2 years ago

who swam the fastest. tawni 50m 40.8 seconds pepita 100m butterfly 60.2 seconds or Susana 200 medley 112.4 seconds

Delicious77 [7]

Since they are asking you who swam the fastest not the longest etc but the fastest. So the answer would be tawni. I believe this because they never said who swam more BUT JUST THE FASTEST PERIOD! Sorry, i went too far. Hope this helps! :)

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3 years ago

Write the expression in standard form by expanding and collecting like terms -3 (1 - 8m - 2n)

Zarrin [17]

I hope this helps you -3.1 -3. (-8m) -3. (-2n) -3+24m+6n 24m+6n-3

4 0

3 years ago