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Oduvanchick [21]
3 years ago
7

The interest on an investment varies directly as the rate of interest. If the interest is $43 when the interest rate is 4%, find

the interest when the rate is 8%.
Mathematics
1 answer:
Sonbull [250]3 years ago
8 0

9514 1404 393

Answer:

  $86

Step-by-step explanation:

Since the interest varies directly, doubling the rate will double the interest.

The interest is $86 when the rate is 8%.

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The value of the expression 23 +32–3x4–52-5+(7x4) is
Mashcka [7]

Answer:

24

Explanation:

(23+32)-(3×4)-(52-5)+(7×4)

(55)-(12)-(47)+(28)

  • 55-12=43
  • -47+28= -19
  • 43-19=24
4 0
3 years ago
Determine whether 81a2 − 25z6 is a difference of two squares. If so, factor it. If not, explain why.
aev [14]

81 a² - 25 z^{6} is a difference of two squares and its factors are (9a + 5z³) and (9a - 5z³)

Step-by-step explanation:

The difference of two squares is a binomial of two terms each term is a square and the sign between the two terms is (-), its factorization is the product of two identical binomials with different middle signs

  • a² - b² is a difference of two squares
  • a² - b² = (a + b)(a - b)

∵ The binomial is 81 a² - 25 z^{6}

∵ \sqrt{81} = 9

∵ \sqrt{a^{2} } = a

∴ \sqrt{81a^{2}}=9a

∵ \sqrt{25} = 5

∵ \sqrt{z^{6}} = z³

∴ \sqrt{25z^{6}}=5z^{3}

- The two terms have square root

∵ The sign between them is (-)

∴ 81 a² - 25 z^{6}  is a difference of two squares

∵ Its factorization is two identical brackets with different

   middle signs

∵ 81 a² = 9a × 9a

∵ 25 z^{6} = 5z³ × 5z³

- The terms of the two brackets are 9a and 5z³

∴ 81 a² - 25 z^{6} = (9a + 5z³)(9a - 5z³)

81 a² - 25 z^{6} is a difference of two squares and its factors are (9a + 5z³) and (9a - 5z³)

Learn more:

You can learn more about the difference of two squares in brainly.com/question/1414397

#LearnwithBrainly

7 0
3 years ago
Come hither for a brainliest
Likurg_2 [28]

Answer:

x - 10, I believe

Step-by-step explanation:

The differences between the x-values and the y-values are

1) 12 & -12 = 0

2) -4 & 0 = 4

3) 0 & 7 = 7

4) 10 & 0 = -10

Since the question asks which must be A factor of p(x) or the y-value, I would advise to look for the answer that helps you receive one of the differences shown above. That said, I would go with <em>x - 10.</em>

<em />

Does that help?

7 0
3 years ago
Read 2 more answers
Determine if the statement is always, sometimes, or never true. Two angles that are vertical are __________ adjacent.
Morgarella [4.7K]

Never true. Vertical angles are equal to each other, not adjacent to each other.

4 0
3 years ago
Is parallelogram VWXY a rhombus?
skelet666 [1.2K]

Answer:

it is a a rhombus......... parallelogram is also called as a rhombus....

3 0
3 years ago
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