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VLD [36.1K]
3 years ago
15

Find the number of possible positive real zeros of f(x)= -7x^4+ 49x^3+ 84x^2.

Mathematics
1 answer:
Solnce55 [7]3 years ago
5 0
B.Two is your answer
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In a certain game, each player scores either 2 points or 5 points. If n players score 2 points and m players score 5 points, and
zhannawk [14.2K]

Answer:

b. 3

Step-by-step explanation:

Here, n players score 2 points and m players score 5 points,

So, total scores = 2n + 5m,

According to the question,

The total number of points is 50,

⇒ 2n + 5m = 50

Since, n and m can be any positive integers including 0 ( because number of players can not be negative or in fraction )

Also, for the positive integer value of m, n must be the multiple of 5 less than or equal to 25,

Thus, the possible values of m and n are,

(5,8), (10, 6), (15, 4), (25,0),

Since, 8-5 < 10-6 < 15-4 < 25-0

Hence, the least possible positive difference between n and m is 3.

Option 'b' is correct.

5 0
3 years ago
I need the answer for both questions btw its 1 problem I'll give you brainlist if you get it correct i need it asap
nasty-shy [4]

Answer:

1.) B (Real Numbers)

2.) A

Step-by-step explanation:

7 0
3 years ago
This is how you solve this problem: 4/5 = 3 = 4/5 x 3<br> True<br> False
ivann1987 [24]

Answer:

false

Step-by-step explanation:

because when solving fraction as a equation you divide

6 0
3 years ago
4. Simplify the expression. (6 points)
Lunna [17]

<span>4. Simplify the expression.
sine of x to the second power minus one divided by cosine of negative x</span>

<span>(1−sin2(x))/(sin(x)−csc(x))<span>

</span>sin2x+cos2x=1</span> <span>1−sin2x=cos2x<span>

</span>cos2(x)/(sin(x)−csc(x))</span> <span>csc(x)=1/sin(x)</span> <span>cos2(x)/(sin(x)− 1/sin(x))= cos2(x)/((sin2(x)− 1)/sin(x))</span> <span>sin2(x)− 1=-cos2(x)</span> <span>cos2(x)/(( -cos2(x))/sin(x))
=-sin(x)</span>
<span>the answer is the letter a) -sin x

</span><span>5. Find all solutions in the interval [0, 2π). (6 points)
sin2x + sin x = 0
</span> using a graphical tool  
the solutions   x1=0 x2=pi <span>x3=3pi/2
the answer is the letter </span><span>D) x = 0, π, three pi divided by two</span>

3 0
3 years ago
Read 2 more answers
I need help ! On the question i reslly do not get it !
AlexFokin [52]

This question is basically a ratio 1 : 42

so then it would be 2 : 84 then 3 : 126

So your answer is D 3 Gallons for 126 miles.

4 0
3 years ago
Read 2 more answers
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