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
Stella [2.4K]
2 years ago
8

O número -3 é a raíz da equação x² - 7x - 2c = 0. Nessas condições, determine o valor do coeficiente c: A) 7 B) -2 C) -3 D) 15 E

) NDA
Mathematics
1 answer:
Free_Kalibri [48]2 years ago
4 0

Responder:

c = 15

Explicação passo a passo:

se -3 é a solução para a expressão x² - 7x - 2c = 0, para obter c, vamos substituir x = -3 na equação (uma vez que é uma raiz)

x² - 7x - 2c = 0

(-3) ² - 7 (-3) - 2c = 0

9 + 21 - 2c = 0

30 - 2c = 0

30 = 2c

Trocar

2c = 30

c = 30/2

c = 15

Portanto, o valor de c é 15

You might be interested in
How do u get straight A’s?
tatiyna

YOU

GOTTA

GET

SCHOOLED!

7 0
3 years ago
Read 2 more answers
What is the product of 18 and k
SashulF [63]
18k i believe because it is a varible and a number so when u multiply them u just put them together.... is this multi choice question because to see the answers would help
8 0
3 years ago
What is the circumference of a circle with a diameter of 8 feet? Use 3.14 for ON d=80 O A. 25.12 ft B. 12.56 ft C. 50.24 ft D. 1
Andrew [12]

Answer:

25.12

Step-by-step explanation:

Formula: 2πr, r = d/2

Given: π = 3.14, d = 8

Sub: r = 8/2

Simplify: r = 4

Sub: 2(3.14)(4)

Simplify: 6.28(4)

Solve: 25.12

8 0
3 years ago
What is 72.1 repeating as a fraction? Simplified.
Viefleur [7K]
The answer is quite simple after looking at it. 0.1 is a tenth. 72 is a whole number, so you would have 72 1/10.   1/10 is a tenth and 72 is still the whole number.
6 0
3 years ago
Expression 1 is -12x + 3
musickatia [10]

Answer:

-12 + 3 - (10x - 15x + 96)

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Consider statement: If a quadrilateral is a rectangle then it is a parallelogram. Wright the inverse and contrapositive of the o
    9·1 answer
  • Question 1 Answer not submitted Joseph cycled a distance of 4 miles in 45 minutes. What is the unit rate at which Joseph was cyc
    14·1 answer
  • 2.5 +1 <br><img src="https://tex.z-dn.net/?f=2.5%20%2B%201%20%5Cfrac%7B1%7D%7B2%7D%20" id="TexFormula1" title="2.5 + 1 \frac{1}{
    11·1 answer
  • Which of the following best describes the ordered pairs listed below?
    7·1 answer
  • Can someone explain this.
    7·1 answer
  • MY<br> Chaim tried to prove that Triangle JKL = Triangle LMN.
    14·1 answer
  • Place a point D along AC such that BD is an altitude of ABC. Using coordinate algebra, find and record the coordinates of point
    10·1 answer
  • How can you compare data sets?
    9·2 answers
  • Solve the question below
    9·2 answers
  • Triangle ΔABC has side lengths of a = 18, <img src="https://tex.z-dn.net/?f=b%3D18%5Csqrt%7B3%7D" id="TexFormula1" title="b=18\s
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!