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2 years ago

I honestly have no clue how to do these

Mathematics

1 answer:

densk [106]2 years ago

4 0

Answer:

$-2^{2} -4(1)(5)$

so the answer would be c.

Step-by-step explanation:

The discriminant is the following equation:

$b^{2} -4ac$

You just simply plug in the values of the coefficients.

$0=x^{2} -2x+5$

a = 1 (first terms coefficient)

b = -2 (second terms coefficient)

c = 5 (last terms coefficient)

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Leokris [45]

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3 years ago

Which of the following is equal to 7 1/3?<br> will give brainlist

Anestetic [448]

Step-by-step explanation:

c is the correct answer

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3 years ago

A scientist mixes water (containing no salt) with a solution that contains 35% salt. She wants to obtain 245 ounces of a mixture

sesenic [268]

Answer:

140 ounces of water and 105 ounces of 35% salt solution.

Explanation:

Let $x$ be the ounces of water that need to be added and $y$ be the ounces of 35% solution that need to to be added.

We know that the total of ounces of water and of 35% solution must be 245 ounces:

$x+y=245$

35% of $x$ is the salt, and since no salt is added with addition of $y$ liters of water, this must be equal to the amount of salt in the final 15% solution:

$0.35x=0.15*245$

we solve for $x$ and get:

$x=105$

We put this value into $x+y=245$ and solve for $y$ to get:

$y=140$

Thus we have 140 ounces of water and 105 ounces of 35% solution.

8 0

3 years ago

Marty Has Four Cubes. The Cubes Me-sure 13x3x10. what is the volume of all his cubes divided on 2?

tatuchka [14]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Please help question is below

mixas84 [53]

Answer:

exponential function

Step-by-step explanation:

geometric sequence

An = A1 * r^(n-1)

common ratio is 2

A1 = 1st term

nagwa

mthway

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2 years ago