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3 years ago

Rewrite the expression 7 to the -2 power

Mathematics

2 answers:

liberstina [14]3 years ago

8 0

Answer:

(7)^-2

Step-by-step explanation:

hope this helps

iris [78.8K]3 years ago

5 0

Answer:

1/49

Step-by-step explanation:

7^-2

1/49

7^2 is usually 49 for negative exponents just flip it

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19. A quadratic equation is shown below.

victus00 [196]

Answer:

$\{\sqrt b, -\sqrt b\}$

Step-by-step explanation:

Given

$a^2 - b = 0$

Required

Determine the solution

Since b is a perfect square, the equation can be expressed as:

$a^2 - (\sqrt b)^2 = 0$

Apply difference of two squares:

$(a - \sqrt b)(a + \sqrt b) = 0$

Split:

$(a - \sqrt b)= 0 \ or\ (a + \sqrt b) = 0$

Remove brackets:

$a - \sqrt b= 0 \ or\ a + \sqrt b = 0$

Make a the subject in both equations

$a =\sqrt b \ or\ a =-\sqrt b$

The solution can be represented as:

$\{\sqrt b, -\sqrt b\}$

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3 years ago

The answer is 4.8feet in delta math

abruzzese [7]

Answer:

4.8 feet

Step-by-step explanation:

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3 years ago

What is the answer for 7-4x=2+x+6-5x

levacccp [35]

Answer:

no solution

Step-by-step explanation:

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3 years ago

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What is the midpoint of line AC

pishuonlain [190]

Answer:

N/A

Step-by-step explanation:

What is line AC, was there supposed to be a picture?

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3 years ago

Evaluate 2r²+3s³-r²+4+²-r²

Vilka [71]

$2r^2 + 3s^3-r^2+4^2+-r^2 \\ \\ 2r^2 + 3s^3 - r^2 + 16 + -r^2 \\ \\ 2r^2 + 3s^3 = r^2 16 - r^2 \\ \\ (2r^2 - r^2-r^2) + 3s^3+ 16 \\ \\ 3s^3 + 16 \\ \\ Answer: 3s^3 + 16$

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3 years ago

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