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Brilliant_brown [7]
2 years ago
12

A hair care company had 400 people try a new shampoo. 3 people had a mild allergic reaction. What percent of the people had a mi

ld allergic reaction?
Mathematics
1 answer:
cestrela7 [59]2 years ago
5 0

Answer:

12%

Step-by-step explanation:

Hope this helps! :)

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To the nearest tenth, what is the perimeter of the triangle with vertices at (−2, 3), (3, 6), and (2, −2)?
katovenus [111]

9514 1404 393

Answer:

  20.3

Step-by-step explanation:

The distance formula can be used to find the side lengths.

  d = √((x2 -x1)^2 +(y2 -y1)^2)

For the first two points, ...

  d = √((3 -(-2))^2 +(6 -3)^2) = √(5^2 +3^2) = √34 ≈ 5.83

For the next two points, ...

  d = √((2 -3)^2 +(-2-6)^2) = √(1 +64) = √65 ≈ 8.06

For the last and first points, ...

  d = √((-2-2)^2 +(3-(-2)^2) = √(16 +25) = √41 ≈ 6.40

Then the sum of the side lengths is ...

  5.83 +8.06 +6.40 = 20.29 ≈ 20.3

The perimeter of the triangle is about 20.3 units.

7 0
3 years ago
Jan sold for more than three times the number of magazines Mel sold during the school fundraiser Morgan sold 40 more magazines t
pav-90 [236]

Answer: eyyyyyy my name is Jan what a coincidence

Step-by-step explanation:

3 0
3 years ago
What % of people who like chocolate also like pizza
vitfil [10]

Answer: 45% is my guess

Step-by-step explanation:

7 0
3 years ago
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At a pet store, Davina counted 12 parrots out of 20 birds. Which is an equivalent ratio of parrots to birds at the pet store? 2:
Mazyrski [523]

Answer:

3 to 2

Hope it helps xD

3 0
3 years ago
Read 2 more answers
What is the possible number of positive and negative real roots or zeroes in f(x)=x^3+x^2-4
Tanya [424]

This is a third degree polynomial, so we know that the maximum amount of roots will be 3.

We also know that imaginary roots come in pairs, so there is either 0 or 2 imaginary roots.

We can tell the amount of positive / negative roots by applying Descartes' rule of signs.

Let's examine the polynomial: x^3 + x^2 - 4

Note the sign changes.

From left to right, there is one sign change.

We now know there is only one positive real root.

Now, we can replace all values of x with -1 and then simplify. The number of sign changes will tell us the amount of negative roots.

(-1)^3 + (-1)^2 - 4

-1 + 1 - 4

From left to right, there are two sign changes, which tells us there will be 2 or 0 negative roots.

If there are 2, they are not imaginary.

If there are 0, they are imaginary.

<h3>So, our guaranteed root is:</h3><h3>1 positive, real root.</h3><h3>And our possible roots are:</h3><h3>2 negative, real roots.</h3><h3>0 negative, real roots, but 2 imaginary roots.</h3>
3 0
2 years ago
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