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
Ivan
2 years ago
7

Enter your answer and show all the steps that you use to solve this problem in the space provided

Mathematics
1 answer:
VashaNatasha [74]2 years ago
5 0

Answer: x = -4, x = 5

Step-by-step explanation:

You can use the substitution method for this problem.

y = x^{2} + 2x, but y also = 3x +20.

Because of this, you can determine that x^{2} +2x = 3x + 20 because they are both equal to the same thing, y.

Solve the quadratic equation you got from substitution:

x^{2} + 2x = 3x + 20

x^{2} -x = 20

x^{2} -x -20 = 0

You can factor this equation:

(x+4)(x-5) = 0

x = -4, x = 5

You might be interested in
Carl runs around a track in 1.17 minutes. How long would it take him to run 1.5 laps at this rate? [Round to two places
Andru [333]
Multiply:
1.17 x 1.5 = 1.755
 rounded to 2 places = 1.76 minutes
6 0
3 years ago
Read 2 more answers
Can i have the answers plz​
AleksAgata [21]

anna plis jangan tanya saya 1×7=7

4 0
3 years ago
Elena randomly chooses a number from 1 to 10. What is the probability she chooses a number greater than 5?
zepelin [54]

ANSWER

P(E)=\frac{1}{2}

EXPLANATION

From the given information, Elena chooses a number from 1 to 10.

The sample space is

S={1,2,3,4,5,6,7,8,9,10}

n(S)=10

The numbers greater than 5 are:

E={6,7,8,9,10}

n(E)=5

The probability that, she chooses a number greater than 5 is:

P(E) =  \frac{n(E)}{n(S)}

Substitute the values,

P(E) =  \frac{5}{10}

P(E) =  \frac{1}{2}

5 0
2 years ago
What is the Simplified form of √46/192
Lorico [155]

Answer:

  (√138)/24

Step-by-step explanation:

\displaystyle\sqrt{\frac{46}{192}}=\sqrt{\frac{46\cdot 3}{192\cdot 3}}=\sqrt{\frac{138}{24^2}}=\frac{\sqrt{138}}{24}

8 0
2 years ago
Can a matrix of dimensions 2 X 4 be added to another matrix with dimensions of 2 X 6?
Rus_ich [418]

Answer:

No.

Step-by-step explanation:

It has different order of matrices .

For <em>A</em><em>d</em><em>d</em><em>i</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em>or <em>S</em><em>u</em><em>b</em><em>s</em><em>t</em><em>r</em><em>a</em><em>c</em><em>t</em><em>i</em><em>o</em><em>n</em><em> </em>, both matrices must have the same number of <u>r</u><u>o</u><u>w</u><u>s</u> and <u>c</u><u>o</u><u>l</u><u>u</u><u>m</u><u>n</u><u>s</u> .

8 0
3 years ago
Other questions:
  • What is the base of the exponential function f(x)=0.5x−2 ?
    7·1 answer
  • Name the intersection of plane ABC and plane LOD
    13·1 answer
  • Help math question 1 ,2 ,3 grade 12
    5·1 answer
  • What do the following two equations represent -4-4y=-5 4x-4y=1
    5·1 answer
  • 2 square numbers that add up 125
    11·1 answer
  • Triangle A B C. Angle B is 60.8 degrees and angle C is 57.1 degrees. Triangle X Y Z. Angle Z is 60.8 degrees and angle Y is 59.1
    8·2 answers
  • Question 14 (5 points)
    13·1 answer
  • Brainliest if correct Multiply 3/7 by 4/5
    15·1 answer
  • 6w^2 + 11w +8w^2 + 15w -2 and 14w^2 +26w-2 are the equivalent ​
    7·1 answer
  • Okay someone please help me and show you work i need it asap
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!