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
brilliants [131]
3 years ago
15

What is the solution of the system? 7x+5y=19 and -7x-2y=-16 Need help ASAP

Mathematics
1 answer:
Stells [14]3 years ago
3 0

Answer:

x = 2, y = 1

Step-by-step explanation:

  • 7x + 5y = 19
  • -7x - 2y = -16

Use the elimination method to solve the system of equations. Add the terms from top to bottom. 7x and -7x cancel out.

0 + 3y = 3

Divide both sides by 3.

y = 1

Substitute 1 for y into the first equation.

7x + 5(1) = 19

7x + 5 = 19

Subtract 5 from both sides.

7x = 14

Divide both sides by 7.

x = 2

You might be interested in
What is 24 + 100 then times it by two is there more than 120
MatroZZZ [7]
24 + 100 is 124, and 124 x 2 = 248. So yes it is more than 120
7 0
3 years ago
Read 2 more answers
The square root of a negative number, such as StartRoot negative 144 EndRoot, is undefined. Explain why the square root of –x, S
IRINA_888 [86]

Answer:

see the explanation

Step-by-step explanation:

we have

f(x)=\sqrt{-x}

we know that

The radicand of the function cannot be a negative number

so

-x\geq 0

Solve for x

Multiply by -1 both sides

x\leq 0

The domain of the function f(x) is the interval -----> (-∞, 0]

The domain is all real numbers less than or equal to zero

The range of the function f(x) is the interval ----> [0,∞)

The range is all real numbers greater than or equal to zero

<em>Example</em>

For x=144

144\leq 0 ----> is not true

This value of x not satisfy the domain

substitute

f(x)=\sqrt{-144} ----> this value is undefined

For x=-144

-144\leq 0 ----> is true

This value of x satisfy the domain

substitute

f(x)=\sqrt{-(-144)}

f(x)=\sqrt{144}----> this value is defined

therefore

The function will be undefined for all those values of x that do not belong to the interval of the domain of the function

6 0
3 years ago
Read 2 more answers
What is x? I will give brainliest if you explain your answer.
horsena [70]

Answer:

  • x =  {0, π/2, 3π/2, 2π}

Step-by-step explanation:

  • cotx cos x - cot x = 0
  • cotx( cosx - 1) = 0

1. <u>cotx = 0</u>

  • x = π/2 + πn
  • In the interval [0, 2π] we have π/2 and 3π/2

2. <u>cosx = 1</u>

  • x  = 0 + 2πn
  • In the given interval we have 0 and 2π

<u>So the solution set is:</u>

  • x =  {0, π/2, 3π/2, 2π}

3 0
3 years ago
Evaluate p(-2)=x^3-4x-5
Pani-rosa [81]

Step-by-step explanation:

p(x) =  {x}^{3}  - 4x - 5 \\ p( - 2) =  {( - 2)}^{3}  - 4( - 2) - 5 \\  =  - 8 + 8 - 5 \\  =  - 5

3 0
3 years ago
Read 2 more answers
Please I need help with this problem
Vikki [24]

Answer:

The answer is  A

8 0
3 years ago
Other questions:
  • How much its 5+3+3×15=
    13·2 answers
  • A square rug has an area of 46 ft2.
    13·1 answer
  • Simplify (10–2) 4. A) 10^-8 B)10^-6 C)-10^-6 D)-10^8
    10·2 answers
  • Use the Euclidean Algorithm to demonstrate that 621 and 82 are relatively prime to each other. Explain.
    10·1 answer
  • Oakdale Middle School received 240 contributions for its bake sale. Of 30% of the contributions were pies, how many pies did the
    10·1 answer
  • What is the answer to this problem 9/14= (x+8)/(3x-2)
    10·1 answer
  • It takes Jada 20 minutes to walk to school. It takes Andre 80% as long as Jada to walk to school.
    10·1 answer
  • Does anyone know how to calculate this
    6·1 answer
  • One angle of a right angled triangle is 63degree .find the other angle in grades​
    11·2 answers
  • there are 5 different math books, 1 social studies book, and 2 different science books on the shelf. how many different ways can
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!