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
ipn [44]
3 years ago
7

I don’t know the answer

Mathematics
2 answers:
liberstina [14]3 years ago
5 0

Answer: B

Step-by-step explanation:

taurus [48]3 years ago
3 0

Answer:

b

Step-by-step explanation:

You might be interested in
Y=-3x<br> y=6x-9 in substitution method
Anna007 [38]
The two equations given in the question are
y = - 3x
And
y = 6x - 9
Let us now substitute the value of y from the first equation to the second equation, we get
y = 6x - 9
- 3x = 6x - 9
-3x - 6x = - 9
- 9x = - 9
Multiplying both sides of the equation by -1 we get
9x = 9
x = 9/9
   = 1
Now let us put the value of x in the first equation, we get
y = - 3x
   = - (3 * 1)
   = - 3
6 0
3 years ago
Read 2 more answers
How many different 4 color code stripes can be made on a sports car if each code consists of the colors green, red, blue, and wh
Akimi4 [234]
From the list of colors: green, red, blue, and white, there are four colors. The concept that should be used in order to determine the number of 4-color code stripes that can be drawn in the sports car is the concept of BASIC PRINCIPLE OF COUNTING.

The equations that would best help us in answering the question is,
                         n = 4! (that is, four factorial)
For the first pick, there are four choices. When one is already used then, there are only 3 choices for the second color, and so on until the last color. 
                         n = 4 x 3 x 2 x 1 = 24
Thus, there are 24 types of 4-color codes. 
5 0
3 years ago
Use the Quadratic Formula to solve the equation 4x^2−7=4x.
tino4ka555 [31]

Answer:

\large\boxed{x=\dfrac{1}{2}-\sqrt2\ or\ x=\dfrac{1}{2}+\sqrt2}

Step-by-step explanation:

\text{The quadratic formula of}\ ax^2+bx+c=0:\\\\x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

\text{We have:}\\\\4x^2-7=4x\qquad\text{subtract}\ 4x\ \text{from both sides}\\\\4x^2-4x-7=0\\\\a=4,\ b=-4,\ c=-7\\\\b^2-4ac=(-4)^2-4(4)(-7)=16+112=128\\\\\sqrt{b^2-4ac}=\sqrt{128}=\sqrt{64\cdot2}=\sqrt{64}\cdot\sqrt2=8\sqrt2\\\\x=\dfrac{-(-4)\pm8\sqrt2}{(2)(4)}=\dfrac{4\pm8\sqrt2}{8}\qquad\text{simplify by 4}\\\\x=\dfrac{1\pm2\sqrt2}{2}\to x=\dfrac{1}{2}\pm\sqrt2

6 0
3 years ago
Assume that the random variable X is normally distributed, with mean ? = 50 and standard deviation ? = 7. Compute the following
sineoko [7]

Answer:

Step-by-step explanation:

Given that  the random variable X is normally distributed, with

mean  = 50 and standard deviation  = 7.

Then we have z= \frac{x-50}{7} is N(0,1)

Using this and normal table we find that

a) P(56

b) When z=0.02

we get

x=50+0.02(7)=50.14

c) 90th percentile z value =1.645

90th percentile of X =50+7(1.645)\\= 50+11.515\\=61.515

4 0
3 years ago
3/7 + 1/3 is equivalent to
cestrela7 [59]

Answer:

7/21+9/21=16/21

Hope it helps

Have a good day

8 0
3 years ago
Read 2 more answers
Other questions:
  • 3÷5 long division steps​
    6·1 answer
  • A ____ can only display numerical data , while a ______ can display categorical data?
    5·2 answers
  • 10 points to whoever answers this CORRECTLY and QUICKLY. Thanks
    8·1 answer
  • What is the scale of the map if 1 cm on the map represents 20km in reallife
    15·1 answer
  • Plz help me with I don't understand this <br><br>Question 7
    14·2 answers
  • Don't give me the answer, just explain how I can solve it, please:<br>SOLVE: 13 - 3x = 4 (x - 2)
    14·2 answers
  • Job A pays $32,448 per year. How much would Job A pay per hour based on a 52 weeks working 40 hours per week?
    6·1 answer
  • What is 0.5, 1/5, 0.35, 12/25, and 4/5 from least to greatest
    9·2 answers
  • Simplify the expression (8+i)(2+7i)
    6·1 answer
  • What is the volume, in cubic centimeters, of a rectangular prism with a height of 8 centimeters, a width of 7 centimeters, and a
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!