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
natima [27]
3 years ago
9

How to solve x^2+14x-15=0

Mathematics
2 answers:
goldfiish [28.3K]3 years ago
8 0

Answer:

x² +14x-15=0

=>x²+15x-x-15=0

=> x(x +15)-1(x+15)=0

=> (x-1)(x+15)=0

=> x = 1 or,x=-15

Andrei [34K]3 years ago
6 0

Answer: x = 1

Step-by-step explanation:

x^2 + 14x - 15 = 0

x^2 + 14x = 15

x^ + 14x = 15

1 + 14 = 15

So X must = 1

because 14 + 1 = 15

hope this helps mark me brainliest if it did

You might be interested in
The rabbot population in a certian area is 200% of last years population there are 1100 rabbits this year how many were there la
Dahasolnce [82]

1100/2

=550

because 100% is 500 and 100% is last year's population

6 0
3 years ago
License plates are made using 3 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is
Helga [31]

Answer:

26^3\times10^2 = 1757600

option B is correct

Step-by-step explanation:

We have 5 spaces in the license plate:

_ _ _ _ _

we have 26 available letters, and 10 available numbers.

starting with letters:

  • how many choices do i have to place the 1st letter? 26.

26 _ _ _ _

  • how many choices do i have to place the 2nd letter? 26 (since we're allowed to repeat letters)

26 26 _ _ _

  • how many choices do i have to place the 3rd letter? 26

26 26 26 _ _

we've used all the places for letters, (note: the exact position of the letters doesn't matter here, the first letter could've been placed anywhere in _ _ _ _ _, but the amount of possible choices for letters would always be 26).

let's move on to numbers.

  • how many choices do i have to place the 1st number? 10

26 26 26 10 _

  • how many choices do i have to place the 2nd number? 10

26 26 26 10 10

we've completed our number plate. Next we'll simply multiply all these numbers to get all the possible arrangements in which numbers and letters can be displayed on a license place.

26^3\times10^2 = 1757600

option B is correct

8 0
3 years ago
the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.
KatRina [158]
X - tens digit
y - units digit

x=2y\\
x+y=12\\\\
2y+y=12\\
3y=12\\
y=4\\\\
x=2\cdot4\\
x=8\\\\
10\cdot8+4=\boxed{84}

4 0
3 years ago
Ginger buys lunch at school every day. She always gets
shepuryov [24]

Answer:

The estimated probability that Ginger will eat a a pizza everyday of the week is;

D. 8/10 = 80%

Step-by-step explanation:

The given parameters are;

The frequency with which Ginger buys launch = Everyday

The percentage of the time the cafeteria has pizza out = 80%

The outcome of 0 and 1 = No pizza available

The outcome of 2, 3, 4, 5, 6, 7, 8, and 9 = Pizza available

Therefore, we have the;

Group number  {}                          Percentage of time pizza available

1                     {}                          80%

2                     {}                          80%

3                     {}                          80%

4                     {}                          80%

5                     {}                          40%

6                     {}                          100%

7                     {}                          80%

8                     {}                          100%

9                     {}                          80%

10                     {}                          80%

Therefore, the sum of the percentages outcome the days Ginger eats pizza = 0.8 + 0.8 + 0.8 + 0.8 + 0.4 + 1 + 0.8 + 1 + 0.8 + 0.8 = 8

The number of runs of simulation = 10 runs

The estimated probability that Ginger will eat a a pizza everyday of the week = (The sum of the percentages outcome the days Ginger eats pizza)/(The number of runs of simulation)

∴ The estimated probability that Ginger will eat a a pizza everyday of the week = 8/10

6 0
3 years ago
Read 2 more answers
In the rectangle
LekaFEV [45]
In order to form triangle PQT and quadrilateral TQRS, point T must lie on line PS which is 16 cm. long.

If the ratio of PT to TS is 5:3 and the total length of PS is 16, then PT must be 10 and TS must be 6 (10 + 6 =16) and 10:6 is the same ratio as 5:3. Another way to think about it is 5/3 = 10/6.

Now you have all the lengths that you need to find the areas of the quadrilateral and the triangle.

Make sure you draw a diagram of it!!
7 0
3 years ago
Read 2 more answers
Other questions:
  • Help, thank you. :)
    11·2 answers
  • Tina wants to save money for school. Tina invests $700 in an account that pays an interest rate of 4%. How many years will it ta
    9·2 answers
  • 3(x-2)*2-3? What's the y intercept x intercept vertex and the axis of symmetry ( *2 means the 2 power)
    15·1 answer
  • If f(x) = -x3 + 2x2 - 3, find f(2).
    11·2 answers
  • The table below shows the surface area y, in square feet, of a shrinking lake in x days:
    12·1 answer
  • Algebra 1 4(x-3)=-16
    5·1 answer
  • Freddy fazbear sells pizza slices that are 1/8 of a pizza pie for $1.50 each.A soda is sold for $1.25. If he sells 32 slices of
    9·1 answer
  • Please help I mark brainliest... A theme park has many attractions, one of which is the roller coaster. Are the people who ride
    6·1 answer
  • A voter polling research group determined that 41% of the voters in a country would vote for the democratic candidate with a 4%
    7·2 answers
  • I need help on my question that’s not anwserd please help a
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!