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vlabodo [156]
2 years ago
15

Over which interval is the graph of f(x) = –x2 + 3x + 8 increasing?

Mathematics
2 answers:
Juliette [100K]2 years ago
5 0
Graphing the equation, it is increasing at (–∞, 1.5)
zalisa [80]2 years ago
4 0
Hello,

Answer A: (-infini,3/2)
Vertex is (3/2,41/4) and the curve is turning its concavity down.
f'(x)=-2x+3=0==>x=3/2

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Results in the most extreme 5% of possible outcomes

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7 0
3 years ago
Greg swam 4 kilometers against the current in the same amount of time it took him to swim 16 kilometers with the current. The ra
ad-work [718]

Answer:

5 kmph

Step-by-step explanation:

Given: Greg swam 4 kilometers against the current.

            Greg swam 16 kilometers with the current.

            Rate of the current was 3kmph.

Lets assume the speed of greg swimming with no current be "x".

∴ Speed of swimming against current= (x-3)\ kmph

   Speed of swimming with current= (x+3)\ kmph

As given, it took same amount of time to swim both with current and against current.

∴ Forming an equation to find the value of x, which is speed of greg swimming with no current.

We know, Time= \frac{Distance}{Speed}

⇒ \frac{4}{(x-3)} = \frac{16}{(x+3)}

Multiplying both side by (x+3) and (x-3)

⇒4\times (x+3)= 16\times (x-3)

Using distributive property of multiplication.

⇒ 4x+12= 16x-48

Subtracting both side by 4x and adding by 48.

⇒60= 12x

Dividing both side by 12

⇒x= \frac{60}{12} = 5\ kmph

Hence, Greg can swim at the rate of 5kmph with no current.

7 0
3 years ago
Milo has 15 Dimes, 20 Nickels, 19 Pennies, 8 Quarters, and 1 Half Dollar. Which expression shows one way Milo can use some or al
erastova [34]
1(.50)+8(.25)+20(.05)+15(.10)=5.00
8 0
3 years ago
Read 2 more answers
A doctor has an annual income of $152,125. The income tax the doctor has to pay is 6% , what is the amount of income tax in doll
kupik [55]
I believe the amount of income tax the doctor has to pay is $9,127.5
5 0
3 years ago
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Please help and tell me why you got that answer, will mark brainliest
Georgia [21]

Answer:

The answer is G.

Step-by-step explanation:

When comparing G with the other 3 options, ONLY G hasn't ran more than 6 miles; the rest all options show that he ran more miles in few minutes.

5 0
2 years ago
Read 2 more answers
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