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3 years ago

How many x-intercepts does the graph of each quadratic equation have? Show your work.

Mathematics

1 answer:

Alex73 [517]3 years ago

4 0

Answer:

Step-by-step explanation:

In each case we find the discriminant b^2 - 4ac.

If the discriminant is negative, we have two unequal, complex roots.

If the discriminant is zero. we have two equal, real roots.

If the discriminant is positive, we have two unequal real roots.

#51: 8v^2 - 12v + 9: the discriminant is (-12)^2 - 4(8)(9) = -144. we have two unequal, complex roots

#52: (-11)^2 - 4(4)(-14) = 121 + 224 = 345. we have two unequal real roots.

#53: (-5)^2 - 4(7)(6) = 25 - 168 (negative). we have two unequal, complex roots.

#54: (4)^2 - 16 = 0. We have two equal, real roots.

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Convert 1.835 × 10−4 to standard notation.

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0.0001835 is the right answer after converting

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4 years ago

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HELP ME!!! Answer in Scientific Notation and explain and show work.

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Multiplying means you add the exponents and dividing means you subtract the exponents. Treat the decimals as you normally would.
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$(6 \times {10}^{3} ) \times (1.5 \times {10}^{ - 2} )$
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$\frac{(7.8 \times {10}^{3}) }{(1.2 \times {10}^{4}) }$
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3 years ago

If m∠8=23°, find the measure of each missing angle. Give your reasoning.

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3 years ago

Claire had 4 1/6 feet of string. She used some string to hang out decorations. Now she has 1 5/6 feet of string left. How much s

vodka [1.7K]

Answer:

Length of string used by Claire = 7 / 3 feet

Step-by-step explanation:

Given:

Length of string Claire in starts = $4\frac{1}{6}$ feet

Length of string Claire in end = $1\frac{5}{6}$ feet

Find:

Length of string used by Claire

Computation:

Length of string Claire in starts = $4\frac{1}{6}$ feet = 25 / 6 feet

Length of string Claire in end = $1\frac{5}{6}$ feet = 11 / 6 feet

Length of string used by Claire = Length of string Claire in starts - Length of string Claire in end

Length of string used by Claire = [25 / 6] - [11 / 6]

BY taking LCM

Length of string used by Claire = [25 - 11] / 6

Length of string used by Claire = 14 / 6

Length of string used by Claire = 7 / 3 feet

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3 years ago

What is the solution to 3/4(x+8)=9

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4 years ago

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