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
Vanyuwa [196]
3 years ago
8

What is the value of 7x^2 + 3x + 4 when x=2?

Mathematics
2 answers:
Nonamiya [84]3 years ago
8 0

Answer:

38

Step-by-step explanation:

substitute the value of the variable into an equation, then simplify

DerKrebs [107]3 years ago
3 0

Answer:

38

Step-by-step explanation:

To find the value of 7x^2 + 3x + 4 when x=2. We have to plug in x. So plugging x in, we have

7(2)^2 +3(2) +4

and this becomes

7(4) + 6 +4

or

8(4)+6

which is 38

You might be interested in
If we transform y=x^2 by 5 units to the left and 8 units ups, what is the vertex of the resulting parabola?
sertanlavr [38]

Answer: y = (x + 5)² + 8

<u>Step-by-step explanation:</u>

y = x²

left 5 units:       y = (x + 5)²

up 8 units:        y = (x + 5)² + 8

7 0
3 years ago
Read 2 more answers
Which shows all the prime factors for 36?   A.2 • 18  B.4 • 9  C.2 • 2 • 3 • 3  D.2 • 2 • 3 • 5
DENIUS [597]
36 = 2 x 2 x 3 x 3 (Answer C)
7 0
3 years ago
Which of the following are identities? Check all that apply
Natasha2012 [34]

Answer:

A, C

Step-by-step explanation:

Actually, those questions require us to develop those equations to derive into trigonometrical equations so that we can unveil them or not. Doing it only two alternatives, the other ones will not result in Trigonometrical Identities.

Examining

A) True

\frac{1-tan^{2}x}{2tanx} =\frac{1}{tan2x} \\ \frac{1-tan^{2}x}{2tanx} =\frac{1}{\frac{2tanx}{1-tan^{2}x}}\\ tan2x=\frac{1-tan^{2}x}{2tanx}

Double angle tan2\alpha =\frac{1 -tan^{2}\alpha }{2tan\alpha}

B) False,

No further development towards a Trig Identity

C) True

Double Angle Sine Formula sin2\alpha =2sin\alpha *cos\alpha

sin(8x)=2sin(4x)cos(4x)\\2sin(4x)cos(4x)=2sin(4x)cos(4x)

D) False No further development towards a Trig Identity

[sin(x)-cos(x)]^{2} =1+sin(2x)\\ sin^{2} (x)-2sin(x)cos(x)+cos^{2}x=1+2sinxcosx\\ \\sin^{2} (x)+cos^{2}x=1+4sin(x)cos(x)

7 0
3 years ago
Read 2 more answers
A snail traveled 1/4 kilo in 5/6 hours. What was its average speed
AysviL [449]

Answer:

3/10 kilos per hr

Step-by-step explanation:

1/4÷5/6=1/4×6/5

=6/20=3/10

5 0
2 years ago
A shoe factory makes the same number of shoes each hour.By 1:00 pm, the factory made 240 shoesBy 5:00 pm, the factory made 432 s
Anton [14]
432-240=192
192 is the amount of shoes produced in 4 hours
194/4=48
48 is the amount of shoes products per hour
8 0
3 years ago
Other questions:
  • What is the value of x?
    5·1 answer
  • Please help me! Given triangle ABC with A(-4,-2), B(4,4), and C(18,-8) write the equation of the line containing the altitude th
    12·1 answer
  • Mark as brainliest
    14·2 answers
  • This is B now please help...???
    13·1 answer
  • 1. 5/6x-2=1/x+1
    15·1 answer
  • Braelyn Is writing including to officiate rectangle with a width equal to half the length she knows the perimeter is equal to 18
    12·1 answer
  • Identify the pattern for the following sequence. Find the next three terms in the sequence.
    11·1 answer
  • Consider the points R and S in the figure. How many different lines pass through both R and S? Explain.
    13·1 answer
  • Michael forgot the combination to his locker. His locker uses
    12·1 answer
  • I'm stuck on this homework question. I forgot the formula to find the side. This is 9th grade geometry.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!