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3 years ago

Use the quadratic formula to find the solutions to the equation. 3x2 - 10x + 5 = 0

Mathematics

2 answers:

krok68 [10]3 years ago

4 0

Answer:

The answer is A 10 +/ $\sqrt{40}$ /6

Step-by-step explanation:

I just took the test

Nitella [24]3 years ago

3 0

Answer: A

Step-by-step explanation:

3x² - 10x + 5 = 0

a = 3 b = -10 c = 5

Δ = b²- 4ac = 100 - 4.3.5 = 40 > 0 => have 2 solutions

=> x = $\frac{10+\sqrt{40} }{6}$ or x = $\frac{10-\sqrt{40} }{6}$

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Marcia has a licorice rope that is 28 inches long. She wants to cut it into 3,-inch pieces to share with friends. How many piece

diamong [38]

Answer:

9 pieces

Step-by-step explanation:

28 inches rope cut into 3-inch pieces

28/3 = 9 1/3

There is no matching answer choice, if given numbers are correct then the answer is 9 full pieces

---------

The close answer choice is 8
28/8 = 3 1/2 or 3.5
So if cut into 3.5 inch pieces then it is 8 full pieces
just in case it was typo 3 instead of 3.5

8 0

4 years ago

Read 2 more answers

The half-life of cesium-137 is 30 years. Suppose we have a

VMariaS [17]

(a) If $y(t)$ is the mass (in mg) remaining after $t$ years, then $y(t) = y(0) e^{kt}=100e^{kt}.$

$y(30) = 100 e^{30k} = \frac{1}{2}(100) \implies e^{30k} = \frac{1}{2} \implies k = -(\ln 2) /30 \implies \\ \\
y(t) = 100e^{-(\ln 2)t/30} = 100 \cdot 2^{-t/30}$

(b) $y(100) = 100 \cdot 2^{-100/30} \approx \text{9.92 mg}$

(c)
$100 e^{- (\ln 2)t/30} = 1\ \implies\ -(\ln 2) t / 30 = \ln \frac{1}{100}\ \implies\ \\ \\
t = -30 \frac{\ln 0.01}{\ln 2} \approx \text{199.3 years}$

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3 years ago

Pleaseee helppp answer correctly !!!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!

solong [7]

Answer:

108

Step-by-step explanation:

pentagons have interior angle measures of 540

540/5=108

3 0

3 years ago

Which expression is not equivalent to −6 × ( 1/3 + 1/3 )?

Damm [24]

Answer: -6/3+1/3

Step-by-step explanation: Just solve all the problems until you find one that is not the same answer :)

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3 years ago

What is 20℅ of 350℅ <br>please help

Ad libitum [116K]

What is 20 percent (%) off $350?

Using the formula 1 and replacing the given values:

Amount Saved = Original Price x Discount % / 100. So,
Amount Saved = 350 x 20 / 100
Amount Saved = 7000 / 100

Amount Saved = $70 (answer)

3 0

3 years ago