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Zarrin [17]
3 years ago
10

Explain how you know that 4/5 =8/10

Mathematics
1 answer:
Alina [70]3 years ago
3 0

Answer:

have:

\frac{4}{5}  =  \frac{4.2}{5.2}  =  \frac{8}{10 }

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Solve the equation
Vikki [24]

Answer:

x ≈ - 5.32, x ≈ 1.32

Step-by-step explanation:

Given

x² + 4x - 7 = 0 ( add 7 to both sides )

x² + 4x = 7

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(2)x + 4 = 7 + 4

(x + 2)² = 11 ( take the square root of both sides )

x + 2 = ± \sqrt{11} ( subtract 2 from both sides )

x = - 2 ± \sqrt{11}

Thus

x = - 2 - \sqrt{11} ≈ - 5.32 ( to 2 dec. places )

x = - 2 + \sqrt{11} ≈ 1.32 ( to 2 dec. places )

4 0
3 years ago
Simplify 3^8 x 3^4 / 3^2 x 3^8 leaving your answer in index form
Furkat [3]

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Step-by-step explanation:

Step 1: Add exponents

\frac{3^{12}}{3^{10}}

Step 2: Subtract exponents

You should get 3² because of exponent rules. Remember when you multiply exponents you add the powers and when you divide exponents you subtract the powers.

3 0
2 years ago
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Find the coordinates of the image of point R(3, -5) rotated 180 degrees about the origin.
kolbaska11 [484]
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6 0
3 years ago
Hey can you please help me posted picture of question
Nady [450]
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3 years ago
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3 years ago
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