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77julia77 [94]
3 years ago
11

Factor the expression. 2x^2 + 3x - 9

Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

(2x-3)(x+3)

Step-by-step explanation:

The factors of the expression are (2x-3) and (x+3).

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Eli's Electronics has 60-inch television on sale this week for $798. The television is regularly priced for $1050. By what perce
umka2103 [35]

Answer: that would be 76% hope that helps



Step-by-step explanation:


3 0
3 years ago
Solve for x <br> 23=7/9(6z-36)+9
zzz [600]

Answer: z=9

Step-by-step explanation:

If you meant to solve for "z", then refer to the attachment below.

3 0
2 years ago
Read 2 more answers
A point moves along a straight path. The function f ( t ) = log 2 ( t ) determines the distance (in meters) the point has travel
Marina CMI [18]

Answer:

a) 4.392317 mt

b) 9 seconds

c) \large f^{-1}(d)=2^d\;sec.

Step-by-step explanation:

We have

\large f(t)=log_2(t)

where t is given in seconds and t in meters.

<em>a)How far has the point traveled 21 seconds after it started moving?</em>

By replacing t=21 in our equation we get

\large f(21)=log_2(21)=4.392317 \;mt

<em>b)If the point has traveled 3.16993 meters, how many seconds have elapsed since it started moving?</em>

We need to find a t such that f(t) =3.16993.  

This can be accomplished by using the definition of log_2

\large f(t)=3.16993\rightarrow log_2(t)=3.16993\rightarrow t=2^{3.16993}=9\;sec.

<em>c)Write a function f^{-1} that determines the number of seconds that have elapsed since the particle started moving in terms of the distance (in meters) the particle has traveled.</em>

f^{-1} is given by the definition of log

\large f^{-1}(d)=2^d\;sec.

5 0
3 years ago
9 is 12 percent of what number? ( show your work)
Rasek [7]
For this question, we want to find out what 9 / 12 equals as a percent or x / 100. Therefore, we have a proportion here and can say: 9/12 = x/100 Now, at this point, we can cross multiply to get: 900 = 12x Now, divide both sides by 12 to get x alone and find that: x = 75 <==== FINAL ANSWER
so 9 is 12% of 75!
I hope that helps you out! Please let me know if you have any other questions!
3 0
3 years ago
one interior angle of a polygon is equal to 800 and each of the other interior angles are 128 degrees. Find the number of sides
KiRa [710]

Answer:

6

Step-by-step explanation:

Given information:

Interior angle of a polygon cannot be more that 180°.

One interior angle = 80^{\circ}

Other interior angles are  = 128^{\circ}

Let n be the number of sides of the polygon.​

Sum of interior angles is

Sum=80+128(n-1)

Sum=80+128n-128

Combine like terms.

Sum=128n-48           .... (1)

If a polygon have n sides then the sum of interior angles is

Sum=(n-2)180

Sum=180n-360           .... (2)

Equating (1) and (2) we get

180n-360=128n-48

Isolate variable terms.

180n-128n=360-48

52n=312

Divide both sides by 52.

n=\frac{312}{52}

n=6

Therefore the number of sides of the polygon is 6.

8 0
3 years ago
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