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nekit [7.7K]
3 years ago
15

If f(x) = -2x2 + x – 5, what is f(3)?

Mathematics
1 answer:
exis [7]3 years ago
8 0

F(3)=2x2-3-5

= 4-3-5

=1-5

=-4

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Terry sees this offer refurbished phone 35% off now only ?78 what was the original price
Ronch [10]

Answer:

$223.

Step-by-step explanation:

Let x be the original price of phone.          

We are told that Terry sees this offer refurbished phone 35% off now only $78.

We need to find x such that 35% of x is 78. We can represent this information as:

\frac{35}{100} x=78

0.35 x=78

x=\frac{78}{0.35}    

x=222.8571428571428571\approx 223

Therefore, the original price of phone was $223.

   

3 0
3 years ago
The sum of two numbers is 50 and their difference is 4 what are the two numbers
Deffense [45]

Answer:

27 and 23

Step-by-step explanation:

We can solve this problem as a system of equations. X is the first number and Y is the second number.

The first equation is x+y = 50 and the second equation is x-y=4

Now we solve the system, using elimination method:

x+y=50

x-y=4

2x = 54

x = 54/2

x = 27

And from any of the equations we can find Y

27 + y = 50

y = 50 - 27

y = 23

6 0
3 years ago
What are some benefits of representing data sets using frequency distributions?
nekit [7.7K]

Answer:

no answer

Step-by-step explanation:

no answer

to be checked in options

3 0
2 years ago
Valentino wants to estimate the product (5.2)(9.9). Which expression shows each factor rounded to the nearest whole
vovikov84 [41]

Answer:

it is (6)(10)

Step-by-step explanation:

I just took the edgenuity  test so I know

5 0
3 years ago
I need help (please show your work)
oksano4ka [1.4K]

Answer:

the solution is (-4, 3)

Step-by-step explanation:

if you were to graph y = -7/4x - 4 you could plot your first point at (0, -4) and get your second point by going up 7 units (from (0, -4) and to the left by 4

if you were to graph y = -1/4x + 2 you could plot your first point at (0, 2) and get your second point by going up 1 unit (from (0, 2) and to the left by 4

the second point plotted for each equation will be the point of intersection, (-4, 3)

6 0
3 years ago
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