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
Yuliya22 [10]
2 years ago
11

What is the value of 3x^2+4x+12 when x=-2

Mathematics
2 answers:
zepelin [54]2 years ago
6 0

Answer:

16

Step-by-step explanation:

3 x -2^2 + 4 x -2 + 12

first do exponents -2 x -2 = 4

3 x 4 + 4 x -2 + 12

Next do multiplication or division from left to right

12 - 8 + 12

now do subtraction or addition from left to right

4 + 12

16

irina [24]2 years ago
3 0
56 is the answer to the equation
You might be interested in
I really need help with this one it's due today!!
baherus [9]

Answer:

-2/3

3/2

Step-by-step explanation:

So to have a line parallel the equation is: m1 = m2, meaning the slope (represented by m in this equation) is equal. So in the equation. 3y = - 2x + 4 you need to simplify the equation by dividing both sides by 3. Which would be like so: y = - 2/3x + 4/3, which the slope will be -2/3.

To be perpindicular you need the slope to be: m1 * m2 = - 1. So because we already know that the slope is -2/3, all we need to do is set up an equation: -2/3 * y = - 1

-2/3y = - 1

multiply both sides by 3/-2

y = 3/2

4 0
2 years ago
A rectangular room is 5 meters longer than it is wide, and its perimeter is 26 meters. Find the dimension of the room.
amid [387]

Answer:

l=×+5

w=×

p=2(×+5+×)

=2(2×+5)

26=4×+10

26-10=4×

16=4×

×=4

length=5+4=9

width=4

4 0
2 years ago
Mrs. Giuntini’s lawn is triangle shaped with a base of 25 feet and a height of 10 feet. What is the area of Mrs. Giuntini’s lawn
Vedmedyk [2.9K]

area \:  =  \frac{1}{2} bh \\ area \:  =  \frac{1}{2} (25)(10) \\ area =  \frac{1}{2} 250 \\ area = 125 \: feet ^{2}

4 0
3 years ago
Read 2 more answers
Work out the size of the angle X.<br><br> Give your answer correct to 3 significant figures.
aleksley [76]

Step-by-step explanation:

Recall the Ratio for tan

Tan(theta) = opposite / adjacent

Tan (x) = 9 / 5

solve for x (use Tan^-1(...) )

3 0
2 years ago
Read 2 more answers
PLEASE HURRY HELP ME DUE IN 5 MIN
Mars2501 [29]

Answer:

Parallel I checked with a graph

3 0
3 years ago
Other questions:
  • if you had 12 pieces of something to share equally among 5 people how much licorice would each person get
    10·1 answer
  • A line passes through the ordered pairs (4,1) and (2,8). What is the slope? Please help due today
    5·1 answer
  • What is 3*3-38+-84-7+356/45
    9·1 answer
  • 9+1/2(7n-26)-8n simplify
    15·1 answer
  • Need to find surface area
    5·2 answers
  • Consider the given rectangle with heightequals4timeswidth. Let x be the width of the rectangle. Write an expression for the​ per
    6·1 answer
  • Find the distance between the two points rounding to the nearest tenth (if necessary).
    8·1 answer
  • X²y-2xy+y=?????????<br><br><br><br>​
    14·1 answer
  • The midpoint between x and 27 is -3. Find x.
    6·1 answer
  • En una sociedad participan 5 socios, colocando todos capitales iguales, lo unico que el primer socio estuvo 1 año y medio, el se
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!