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klasskru [66]
3 years ago
5

If f(x) = -2x^2 + x–5, what is f(3)?

Mathematics
1 answer:
yan [13]3 years ago
7 0

Answer:

-20

Step-by-step explanation:

Replace X by 3

f(3) = -2(3)^2+ (3)-5 = -20

You might be interested in
F(x)= x squared + 6x + 8
defon

Answer: (x+4) (x+2)

Step-by-step explanation:

x^2 + 2x + 4x +8

4 0
2 years ago
Pls help ME PLSSSSS!!!!!!
Scilla [17]

(a) the interquartile range

Would be 72 - 88

the med would be 84  

(b) I may be wrong but my guess would be

88% above all the seasons because the scale that was shown went to 100 and that would cause each win to be 1%. the bottom would have to equal out to 12% because that is what we would need to make it equal out to 100.

Hope this helps

8 0
3 years ago
Question 2 Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 95
lianna [129]

Answer:

it will take 1.4 hours for the two trains to be 294 miles apart

Step-by-step explanation:

Let t be the time taken for each train

The westbound train travels at 95 miles per hour.

Speed of westbound train = 95

time = t

Distance = speed * time = 95 t

The eastbound train travels at 115 miles per hour

Speed of eastbound train = 115

time = t

Distance = speed * time = 115 t

both trains are 294 miles apart means the distance between both trains are 294 miles

So we add the distance of both trains and set it equal to 294

95t + 115t = 294

210 t =294

t = 1.4

So, it will take 1.4 hours for the two trains to be 294 miles apart

6 0
3 years ago
Can u answer this for me please step by step I'm desperate<br> -| -40 |
kicyunya [14]

Answer:

- 40

Step-by-step explanation:

The absolute value always returns a positive value , that is

- | - 40 | = - | 40 | = - 40

3 0
2 years ago
Q6: Which is the graph of the polar equation r=1/1-sin theta.
AveGali [126]

Answer:

The correct answer is C.

Step-by-step explanation:

The given equation is;

r=\frac{1}{1-\sin(\theta)}

This implies that;

r(1-\sin(\theta)=1

r-r\sin(\theta)=1

Let us write in Cartesian coordinates by substituting;

r=\sqrt{x^2+y^2} ,y=r\sin(\theta)

\sqrt{x^2+y^2}-y=1

\sqrt{x^2+y^2}=y+1

Square both sides;

(\sqrt{x^2+y^2})^2=(y+1)^2

This implies that;

x^2+y^2=y^2+2y+1

x^2=2y+1

y=\frac{1}{2}x^2-\frac{1}{2}

This is an equation of a parabola that opens upwards with a  y-intercept of -\frac{1}{2}.

The correct choice is C

4 0
3 years ago
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