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
Allisa [31]
3 years ago
5

Evaluate 3(x - 4) + 2x - x? for x = 5. A. - 12 B. -4 Ć. 40 D.0​

Mathematics
2 answers:
Xelga [282]3 years ago
7 0

Answer:

8

Step-by-step explanation:

Anton [14]3 years ago
7 0

Answer:

  • 8

Step-by-step explanation:

<u>Simplify</u>

  • 3(x - 4) + 2x - x =
  • 3x - 12 + x =
  • 4x - 12

<u>If x = 5, the value of expression is</u>

  • 4*5 - 12 = 20 - 12 = 8
You might be interested in
Consider the points A(5, 3t+2, 2), B(1, 3t, 2), and C(1, 4t, 3). Find the angle ∠ABC given that the dot product of the vectors B
Vilka [71]

Answer:

66.42°

Step-by-step explanation:

<u>Given:</u>

A(5, 3t+2, 2)

B(1, 3t, 2)

C(1, 4t, 3)

BA • BC = 4

Step 1: Find t.

First we have to find vectors BA and BC. We do that by subtracting the coordinates of the initial point from the coordinates of the terminal point.

In vector BA B is the initial point and A is the terminal point.

BA = OA - OB = (5-1, 3t+2-3t, 2-2) = (4, 2, 0)

BC = OC - OB = (1-1, 4t-3t, 3-2) = (0, t, 1)

Now we can find t because we know that BA • BC = 4

BA • BC = 4

To find dot product we calculate the sum of the produts of the corresponding components.

BA • BC = (4)(0) + (2)(t) + (0)(1)

4 = (4)(0) + (2)(t) + (0)(1)

4 = 0 + 2t + 0

4 = 2t

2 = t

t = 2

Now we know that:

BA = (4, 2, 0)

BC = (0, 2, 1)

Step 2: Find the angle ∠ABC.

Dot product: a • b = |a| |b| cos(angle)

BA • BC = 4

|BA| |BC| cos(angle) = 4

To get magnitudes we square each compoment of the vector and sum them together. Then square root.

|BA| = \sqrt{4^2 + 2^2 + 0^2} = \sqrt{20} = 2\sqrt{5}

|BC| = \sqrt{0^2 + 2^2 + 1^2} = \sqrt{5}

2\sqrt{5}\sqrt{5}\cos{(m\angle{ABC})} = 4

10\cos{(m\angle{ABC})} = 4

\cos(m\angle{ABC}) = \frac{4}{10}=\frac{2}{5}

m\angle{ABC} = cos^{-1}{(\frac{2}{5})}

m\angle{ABC} = 66.4218^{\circ}

Rounded to two decimal places:

m\angle{ABC} = 66.42^\circ

3 0
2 years ago
How far is 0, 7 from the origin
Delvig [45]

Answer:

7

Step-by-step explanation:

Count the numbers in between (0,0) and (0,7).

5 0
3 years ago
The holding period of property acquired by gift may begin on:
maw [93]

Answer:

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
For question 3, is it right though? Thankss
pishuonlain [190]

Yes it is correct, 7/12 is the equivalent to C. 7 divided by 12

8 0
3 years ago
Please evaluate this
siniylev [52]

Answer:

y = 2 \: and \: x = 2.5

y=2x-3

2=2

y = 2x - 3 \\ y =  |2 \times 2.5|  - 3 \\ y = 5 - 3 \\ y = 2 \\

And

8 0
3 years ago
Other questions:
  • 4(x+3)=2(2x+6)<br> Solve for x
    12·2 answers
  • Determine the largest interval of the form a
    7·1 answer
  • Joy makes $13 an hour at work. Write a function that represents his pay for each day of work
    12·2 answers
  • 4 1/2 dived by 2 7/10
    9·2 answers
  • All of the following points are on the graph y = 3x +1, except...
    11·1 answer
  • Someone help PLEASE
    6·1 answer
  • If f(x) = 4x3 - 2x and g(x) = x3 + 6x2 + 3x - 7, then find f(x)<br> + g(x)
    9·1 answer
  • I’m to lazy to do my own math so help anyone?
    11·2 answers
  • Find the S.A. of the pyramid,
    12·1 answer
  • <img src="https://tex.z-dn.net/?f=%20%7B%20-%202v%7D%5E%7B4%7D%20%20%7B%20-%206v%7D%5E%7B3%7D%20" id="TexFormula1" title=" { - 2
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!