1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nataly862011 [7]
3 years ago
15

7 times a number is 18 less than the square of that number. Find the positive solution.

Mathematics
1 answer:
Arte-miy333 [17]3 years ago
7 0
So 7 x = x2 -18 so you get the quadratic x^2 -7x -18 and then get 2 x -9= -18 and 2 + -9 = -7 so you get (x + 2) ( x - 9) so the positive solution would be x-9 = 0 so x= 9. Hope this helps :)
You might be interested in
WILL GIVE 20 POINTS
Oksanka [162]

Answer:

The answer is B

Step-by-step explanation:

75 + x = 90

First, Virginia had to write an equation to solve for x.

75 - 75 + x = 90 - 75

Second, Virginia used the subtraction property of equality to isolate x.

x = 15

Third, "x = 15" was the answer Virginia got after subtracting 90 and 75.

75 + 15 = 90

Finally, she had to verify her answer

3 0
2 years ago
Which triangle side lengths form a right triangle? Choose all that apply.
sergij07 [2.7K]
Both 8,15,17 and 15,20,25 will form a right triangle

If you need help with these types of problems just go into google and search Pythagorean theory silver and plug in 2/3 side lengths and if the outcome equals the third number, then that means that the side lengths make a right triangle
3 0
2 years ago
Read 2 more answers
A scientist wishes to estimate the mean breaking strength of a certain type of steel rod within 3.0 psi with 95% confidence. Bas
yaroslaw [1]

Answer:97 rods

Step-by-step explanation:

The number of steel rods for 95% confidence level

n=\left ( \frac{Z_\frac{\alpha }{2}\times \hat{\sigma }}{E} \right )^2

Z_\frac{\alpha }{2}=1.96

E=3

\hat{\sigma }=15

Substituting values

n=\left ( \frac{1.96\times 15}{3}\right )^2

n=96.04\approx 97

Thus 97 rods is tested

6 0
3 years ago
If any one could please help
yKpoI14uk [10]

Answer:

I believe it’s the 3rd option but I’m not completely confident

Step-by-step explanation:

who am I kidding I’m never confident lol

3 0
3 years ago
Read 2 more answers
I need help please i will give u brainly
Vinvika [58]

Answer:

6.04 inches.

Step-by-step explanation:

Corbin want's to make a model, in which every 100 feet would be shown by 1 inch.

The monument is 604 feet in height.

Divide 604 with 100:

604/100 = 6.04

The height of Corbin's model would thereby be 6.04 inches.

~

8 0
2 years ago
Read 2 more answers
Other questions:
  • A recently discovered planet rotates 250 times on its axis in 15 months. At this rate, how many times will the planet rotate in
    11·1 answer
  • In a standard dictionary, where can you find the key to pronunciation marks ?
    5·1 answer
  • 2 points
    5·1 answer
  • Dione has 3 rolls of pennies containing 50 coins each, 4 rolls of nickels
    7·1 answer
  • Which expression is equivalent to c^2 - 4 / c + 3 /
    5·1 answer
  • If you have 3 cups of glue u use 2/3 cup of glue how much slime can u make?
    14·1 answer
  • Generate a frequency table for the following data: 3, 12, 25, 2, 3, 6, 17, 17, 15, 13, 20, 12, 21, 18, 19.
    11·1 answer
  • Which point BEST represents the location of 58 on the number line?
    7·1 answer
  • Can you help me find rhe x vaule​
    9·1 answer
  • Which similarity statement is true using the triangle?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!