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ArbitrLikvidat [17]
3 years ago
12

4/5 x (v−7) = 2 what is the value of v

Mathematics
1 answer:
Juliette [100K]3 years ago
3 0

Answer:

4/5x(v-7)=2

multiply both sides by 5/4, the reciprocal of 4/5

v-7=2x(5/4)

Express 2x(5/4) as a single fraction

v-7=<u>2</u><u>x</u><u>5</u>

4

Multiply 2 and 5

v-7=<u>1</u><u>0</u>

4

Reduce the fraction 10/4 to the lowest by extracting and cancelling 2

v-7=<u>5</u>

2

Add 7 to both sides

v=<u>5</u>+7

2

Covert fraction to 14/2

v=5/2+14/2

Since 5/2 and 14/2 have the same denominator, add them by adding their numerators

v=<u>5</u><u>+</u><u>1</u><u>4</u>

2

Add 5 and 14 together

v=<u>1</u><u>9</u>

2

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Please leave an explanation I’ll mark brainliest :)
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Answer:

Because there are 9 sour straws in total and 3 blue sour straws, the probability of pulling out a blue sour straw would be 3/9 or 1/3. Because we aren't replacing it, that means that there's one less straw in the box so there should only be 8 straws left. Because there's 4 pink sour straws, the probability of pulling out a pink sour straw is 4/8 or 1/2.

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3 years ago
How could this Rational Equation be solved? The answer is supposed to be 4 times the negative or positive square root of 30, and
never [62]
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3 = 4x + 8 -x^2+4\\\\3 = 4x+ 12 - x^2\\\\3 = -x^2 + 4x + 12\\\\-x^2 + 4x + 9 = 0\\\\x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\x_{1,2} = \frac{ -(-4) \pm \sqrt{ (-4)^2 -  4 \cdot 1 \cdot (-9)} }{ 2 \cdot 1 }\\\\x_{1,2} = \frac{ 4 \pm \sqrt{ 52 } }{ 2 }\\\\x_1 = \frac{ 4~+~\sqrt{ 52 } }{ 2 } = 2+\sqrt{13}\\\\x_2 = \frac{ 4~-~\sqrt{ 52 } }{ 2 } = 2-\sqrt{13}

So obviously the answer they gave you is wrong. :P

3 0
3 years ago
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