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Annette [7]
3 years ago
13

Use the quadratic formula to solve x² + 9x + 10 = 0.

Mathematics
1 answer:
tekilochka [14]3 years ago
7 0

Answer:

The quadratic formula: (-b+-sqrtb^2-4ac)/2a

Plugging in the values of a=1, b=9, and c=10, the roots of the equation are: -7.7 and -1.3.

So, the first option is correct.

Let me know if this helps!

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The radius of a semicircle is 4 miles. What is the semicircle's area?
adell [148]

Answer:

8\pi miles or 25.133 miles

Step-by-step explanation:

your radius is 4 miles.

The area of a circle is A= \pi r^{2}

Therefore, the area of this circle is 4^{2} \pi, or 16\pi

Half of this area, because what you're looking for is a semi-circle, is:

8\pi (exact) or 25.133 (rounded) miles.

6 0
3 years ago
84 km / h in m / s plz help me<br>​
PilotLPTM [1.2K]

Answer:

23\frac{1}{3}m/s

Step-by-step explanation:

We can change the km to m first. 1km = 1000m.

84km/h = 84 000m/h

Then, we can change the h to s. 1h = 3600s.

84 000m/h = 23\frac{1}{3}m/s

7 0
3 years ago
Which operation is performed in the derivation of the
yanalaym [24]
It’s =X+ and that’s ru answering
5 0
4 years ago
To which subsets of real numbers does the number -22 belong?
Sergeu [11.5K]

Answer: A -22 can be a rational number as well as a integer

Step-by-step explanation:

Whole Number: A whole number is not a fraction or a decimal so a example would be: 43 or 85 or 1 or 3. Zero is not a whole number. Negative are not whole numbers

Rational number: A rational number is a number that can be expressed as a fraction or a decimal. Like 33 can be 33/1. Most numbers are rational. Zero is a rational number.

Integers: A integer is not a fraction or a decimal. its a positive or negative number. Example: 1 or -5 or 85 or -445. there is still some arguments about if zero is a integer.

Irrational numbers: A irrational number cannot be expressed as a ratio. So for example pi: 3.141592653589......(it keeps on going, we haven't even gotten to the end because its infinite).

Natural numbers: Natural numbers are positive numbers. Example: 1,6,3,4,62,3 etc. Sometimes zero is a natural number.

Hope I helped,

:)

6 0
4 years ago
$10.94 5% sales tax how much is the total
Dmitrij [34]
Find 5 percent of 10.94, which is .55. Since it is sales tax add .55 to 10.94 You get 11.49! Hope this helps
3 0
3 years ago
Read 2 more answers
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