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3 years ago

4k-(2k-6) simplify the expression

Mathematics

1 answer:

Semenov [28]3 years ago

7 0

Hope this helps you out . Of solving for k then just set it equal to zero

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Which of the following best describes the algebraic expression 5(x+2)-3

marin [14]

D. Three less than five times the quantity of a number plus two.

6 0

3 years ago

Read 2 more answers

Greatest to least: 17/20, 19/20, 0.19, 0.24

Yakvenalex [24]

19/20,17/20,0.24,0.19

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4 years ago

Find the area of the composite figure to the nearest hundredth.

Lyrx [107]

Answer:

745.31

Step-by-step explanation:

1. 12.5^2 * 2 = 312.5

2. (3,14 * 156,25)/2 = 245.31

3. (30 * 12.5)/2 = 187.5

4. 187.5 + 245.31 + 312.5 = 745.31

4 0

3 years ago

Expand and combine like terms (3z^5 +7z^2)^2

AVprozaik [17]

Answer:

$\displaystyle{(3z^5+7z^2)^2 = 9z^{10}+42z^7 + 49z^4 }$

Step-by-step explanation:

Since it's a perfect square, we can simply use the formula:

$\displaystyle{(ax+by)^2 = a^2x^2+2abxy+b^2y^2}$

Given the perfect square expression $\displaystyle{(3z^5+7z^2)^2}$ . Apply perfect square formula:

$\displaystyle{(3z^5+7z^2)^2 = 3^2(z^5)^2+2(3)(7)(z^5)(z^2) + 7^2(z^2)^2 }$

Knowing laws of exponent is mandatory when it comes to algebra. Recall that:

$\displaystyle{(a^m)^n = a^{mn}}\\\\\displaystyle{a^m \cdot a^n = a^{m+n}}$

Apply laws of exponent to simplify the terms or expression:

$\displaystyle{(3z^5+7z^2)^2 = 9z^{10}+42z^7 + 49z^4 }$

Since there are no like-terms to do operation with (these terms have different degrees so they are not considered to be like-terms.) Therefore, the final answer is:

$\displaystyle{(3z^5+7z^2)^2 = 9z^{10}+42z^7 + 49z^4 }$

8 0

1 year ago

The sum of the two digit number is 12. If the digit are revesed, then the new number is 18 less than the originaol muber that is

FromTheMoon [43]

Answer:

A) X + Y = 12

B) 10Y + x = 10x + Y -18

B) 9Y = 9x -18 multiplying A) by -9

A) -9Y = 9x - 72 adding A and B we get

0 = 18x -90

x = 5

The number is 75

Double-Check

7 + 5 = 12

75 -57 = 18

Step-by-step explanation:

6 0

3 years ago