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DaniilM [7]
3 years ago
10

Consider the function f(x) = x2 + 3x − 7. Find the value of f(x) when x = 3 and select the correct answer below.

Mathematics
1 answer:
kherson [118]3 years ago
5 0
F(x)=x^2+3x-7
If x=3, then(3)^2+3(3)-7
9+9-7=11
The correct answer is B
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Two sides of a triangle have lengths 10 and 15. What must be true about the length of the third side?
svetoff [14.1K]
A widely-known theorem can be used for this, but only if it is a right triangle (let's assume it is).

Pythagorean Theorem, or <span>a<span>​^2+b^2=c^2 (the ^ means it is brought up to that power, so it would be a(squared) + b(squared) = c(squared))

Let's plug in our numbers into this equation to see what we get,

(Assuming that 10 and 15 are the legs of the triangle.)
10^2 + 15^2 = c^2 (c is your hypotenuse, or your longest side of the triangle.)

10^2 = 100  &  15^2 =  225
100 + 225 = c^2
325 = c^2
(square root)325 = c
</span></span>18.03 ≈ c<span>

So, your final equation should look like this:

10^2 + 15^2 = 18.03^2
Which it does! 100 + 225 = 325

</span><span>What must be true about the length of the third side?
The third side must equal 18.03, <u>only</u> if it is a right triangle. 
</span>
6 0
3 years ago
True or false? Postulates are statements that are accepted without question or justification.
Alexxandr [17]
The answer to this question is true
3 0
3 years ago
Read 2 more answers
a vendor sold 228 sodas &amp; hotdogs. the number of sodas sold was 3 times the number of hot dogs sold. Find the number of soda
mylen [45]
S=sodas h=hotdogs

228=s+h
s=3h

228=3h+h 228=4h h=57

228=s+57 s=171

Answer: 171 sodas and 57 hotdogs were sold by the vendor
7 0
4 years ago
Which expression has the same value as the one below?<br> 50 + (-17)
deff fn [24]

Answer:

33

Step-by-step explanation:

Simplify the expression.

8 0
3 years ago
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)Marcus painted one-third of his bedroom in fourth-fifths of an hour. At this rate, how long would it take him the paint the ent
antoniya [11.8K]
1/3  =  4/5
2/3 =   4/5
3/3 =   4/5
-----------------
          12/5 = 2 and 2/5 of an hour 

2 hours and 24 mins
(i hope so, check my work)
4 0
4 years ago
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