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alekssr [168]
2 years ago
13

What is the value of the discriminant for x2 + 5x = -7?​

Mathematics
1 answer:
Verdich [7]2 years ago
3 0

Answer:

x = -1

Step-by-step explanation:

2x + 5x = -7

7x = -7

x = -1

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If a certain trip takes 40 minutes when you travel 50 miles per hour, how many minutes would it take if you travel 40 miles per
vitfil [10]

Answer:

It would take 50 minutes

Step-by-step explanation:

<u>Distance, velocity and time</u>

The speed is the rate at which the distance changes with respect to time. If x is the distance, t is the time, the speed v can be obtained by

\displaystyle v=\frac{x}{t}

We know the trip takes 40 minutes when traveling at 50 miles/hour. The distance can be determined by isolating x in the above equation

x=vt

The given time is expressed in minutes, we need to convert it to hours. 40 minutes is \frac{40}{60}=0.6666...\ hours. The distance is

\displaystyle x=(50)(0.666..)=33.33\ miles

If the speed was 40 miles/hour, the same distance would be covered in t hours, taken from the above equation as

\displaystyle t=\frac{x}{v}

t=\frac{33.33}{40}=0.8333\ hours = 0.83333*60= 50\ minutes

4 0
3 years ago
Read 2 more answers
Please help! Question Down below.
Luden [163]

Answer:

17.5 i think

Step-by-step explanation:

2+3+1.5+2+9=17.5

6 0
3 years ago
I NEED HELP ASAP thank you so much!!
egoroff_w [7]
B is correct

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5 0
2 years ago
Quadratic equations <br> 9 + 2x2 + 2 =0
TiliK225 [7]

Answer:i kinda don't understand but i guess you mean sqrt11/2?

Step-by-step explanation:2x^2+11=0 easy move

4 0
2 years ago
What criterion can be used to prove the triangles congruent with the given information?
djverab [1.8K]

Answer:

D. none of these

Step-by-step explanation:

The image only shows two congruent angles/sides. In order for one of the given postulates to work, 3 congruent parts of the triangles must be applicable.

8 0
3 years ago
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