If 2.5 is a root of the equation 2x2+5x−q=0, what are the possible values of q?

Answers

Answer 1
Answer:

Answer:

The possible value of q is 25

Step-by-step explanation:

step 1

we have

2x^(2) +5x-q=0

If 2.5 is a root of the equation

then

substitute the value of x=2.5 in the equation and solve for q

2(2.5)^(2) +5(2.5)-q=0

12.5 +12.5-q=0

25-q=0

q=25


Related Questions

Writing expressions word problems Liam had $250. Then, he and his classmates bought a present for their teacher, evenly splitting the $120 cost among the e of them. How much money does Liam have left?
Which figure must be a trapezoid? A.a quadrilateral with no congruent anglesB.a quadrilateral with no congruent sidesC.a quadrilateral with no right anglesD.a quadrilateral with exactly one pair of parallel sides
Which expression is equivalent to 6(p+5)?A. 30+6pB. 30pC. 30+pD. 11p
Please help with number 2
When do i find the LCM and when do i find the Gcf

Mackenzie ran the olympic marathon of 26 1/5 miles in a time of 5 4/5 hours. How far did she run in a 1 hour?

Answers

If you would like to know how far did Mackenzie run in one hour, you can calculate this using the following steps:

26 1/5 = 131/5 miles ... 5 4/5 = 29/5 hours
x miles = ? ... 1 hour

131/5 * 1 = 29/5 * x
131/5 = 29/5 * x
x = 131/5 * 5/29
x = 131/29
x = 4 15/29 miles

The correct result would be 4 15/29 miles.

4(x + 3) + 2x = 6(x + 2)5 + 2(3 + 2x) = x + 3(x + 1)

5(x + 3) + x = 4(x + 3) + 3

4 + 6(2 + x) = 2(3x + 8)

which one has no solutions ?

Answers

The second option is your answer. 

5 + 2(3 + 2x) = x + 3(x + 1)
5 + 6 + 4x = x + 3x + 3
11 + 4x = 4x + 3

Subtract 4 from both sides. You are left with an untrue statement:
11 = 3
11 ≠ 3 so therefore your answer is no solution. 
Let’s try to look at each one.

First one:
4(x+3)+2x=6(x+2)
We can multiply.
4x+12+2x=6x+12
By looking at this, you can tell it’s equal due to the fact when you add like terms, they will have to same answer.

Second one:
5+2(3+2x)=x+3(x+1)
Let’s multiply.
5+6+4x=x+3x+1
I can already tell this isn’t equal. One has +11 and the other has +1. To make sure, let’s have x=1
5+2(3+2)=1+3(1+1)
5+2(5)=1+3(2)
5+10=1+6
15=7
7 and 15 are not the same number, so the second one doesn’t have any solutions.

What is 0.3% written as a decimal?A 0.003

B 0.3

C 3

D 30

Answers

Move the decimal to the right two times.

0.3% => 0.003

A 0.003 is the answer.

Answer:

0.003%

Step-by-step explanation:

you have to multiply this number by 100 which makes 0.3%

The speed of a stream is 4 mph. A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream. what is the speed of the boat in still water

Answers

Answer

Find out the speed of the boat in still water .

To proof

Let us assume that the speed of the boat in still water be u .

As given

The speed of a stream is 4 mph

hence

speed upstream = u - 4

speed downstream = u + 4

Formula

Time = (Distance)/(speed)

As given

A boat travels 8 miles upstream in the same time it takes to travel 16 miles downstream.

First case for the upstream

Time = (8)/(u - 4)

Second case for the downstream

Time = (16)/(4 + u)

now compare the equations

(8)/(u - 4) = (16)/(u + 4)

simplify the equation

8( u +4 ) = 16 (u -4)

8u +32 = 16u - 64

8u = 96

u = (96)/(8)

u = 12 mph is the speed of the boat in still water .

Hence proved





   

   

The speed of the stream = 4 mph.

Let us assume speed of the boat in still water = x mph.

Total speed upstream = (x-4) mph.

Total speed downstream = (x+4) mph.

We know,  time, speed and distance relation.

Time = Distance / Speed.

Total time taken upstream = 8 / (x-4)

Total time taken downstream = 16/(x+4).

Time taken upstream = time taken downstream.

Therefore,

8 / (x-4)  =  16/(x+4).

On cross multiplication, we get

16(x-4) = 8(x+4).

16x - 64 = 8x +32.

Adding 64 on both sides, we get

16x - 64+64 = 8x +32+64

16x = 8x + 96.

Subtracting 8x from both sides, we get

16x-8x = 8x-8x + 96.

8x = 96.

Dividing both sides by 8, we get

x = 12.

Therefore, 12 mph is the speed of the boat in still water.

Examine the graph. A bar graph titled Population of North American Cities. The x-axis is labeled cities. The y-axis is labeled Population in Millions from 0 to 10. New York is above 8 million. Los Angeles is below 4 million. Mexico City 9 million. Guadalajara is under 2 million. Vancouver and Washington are under 1 million. Which conclusion can be drawn from the graph data? Mexican cities have larger populations than US cities. The third most-populous city shown on the graph is in Mexico. The top three most-populous cities shown on the graph are US cities. The population of New York City is more than double the population of Los Angeles.

Answers

The conclusion that can be drawn from the graph data is: "The top three most-populous cities shown on the graph are US cities."

The graph provides population data for several North American cities, and based on the information provided, it is evident that New York, Los Angeles, and Washington are the top three most-populous cities. New York's population is above 8 million, Los Angeles is below 4 million, and Washington is below 1 million. While Mexico City has a population of 9 million, it is the only Mexican city mentioned, and the graph doesn't provide data for other Mexican cities.

Therefore, we can't conclude that Mexican cities, in general, have larger populations than US cities or that the third most-populous city is in Mexico. Additionally, the graph doesn't specify whether Vancouver or Guadalajara is more populous, so we can't make conclusions about their relative populations.

However, it is clear from the data that New York City's population is more than double that of Los Angeles, which further supports the conclusion about the top three most-populous cities being in the US.

Learn more about US Cities here:

brainly.com/question/30403880

#SPJ2

Answer and Step-by-step explanation:

✓ Answer:The population of New York City is more than double the population of Los Angeles.(by process of elimination)

How do you round 46,491 to the nearest ten-thousand

Answers

You look at the place value before that value. You look at the place value on your right and tell yourself if it's 5 and more you round up, if it's 4 and less you stay and the others turn into 0s. Like this: 46,491 rounds to 46,000.
46,491 rounded to the nearest ten thousand is 50,000.

Because 46,491 is closer to 50,000 than it is to 40,000.