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
Fynjy0 [20]
3 years ago
14

Evaluate the expression 3x² + 2x - 4 for x =-2.

Mathematics
1 answer:
marin [14]3 years ago
4 0

Answer:

4

Step-by-step explanation:

3x² + 2x - 4

3(-2)² + 2(-2) - 4

3(4) - 4 - 4

12 - 4 - 4

12 - 8

= 4

You might be interested in
A group of 39 ladies is going to a
nadya68 [22]

Answer:

6 jeeps are needed. the last jeep will fit 4 people because you cant logically cut a jeep in half to make it perfectly sized. In this case its 6 jeeps as your answer.

6x7=42

3 0
3 years ago
Read 2 more answers
Mark dropped an object from a bridge 400 feet above the ground level with an initial velocity of 0. He knows that the gravitatio
lisabon 2012 [21]

Answer:

The first listed equation is the correct equation to solve

The correct answer is: t = 5 seconds

Step-by-step explanation:

Let me mention first that there is an error in the statement that the gravitational pull of the Earth is 16 ft/s^2. It is in fact 32 ft/s^2, and the actual equation uses half of the acceleration multiplied by the square of the variable time, so it gives as final expression :

y(t)=-16\,t^2+ 0 \,t +400

and we want to find the value/s for "t" that make this equation equal zero (when it reaches the ground and the object just touches the ground. This makes the equation we want to solve:

0=-16\,t^2+ 0 \,t +400\\16\,t^2+0\,t -400=0

which solving for "t" becomes:

16\,t^2-400 =0\\16\,t^2=400\\t^2=\frac{400}{16} \\t^2=25\\t= +/- 5\,\,sec

So we adopt the positive answer (positive time) since the negative value has no physical meaning for this problem.

That is: t = 5 seconds

6 0
3 years ago
Which statement is true about the product square root of 2(3square root of 2 + square root of 14)?
sukhopar [10]

Answer:

\sqrt{2} (3\sqrt{2} +\sqrt{14})=6+2\sqrt{7}

Step-by-step explanation:

Given : \sqrt{2} (3\sqrt{2} +\sqrt{14})

Solution:

\sqrt{2} (3\sqrt{2} +\sqrt{14})

3*2+\sqrt{28})

6+2\sqrt{7}

Thus ,  \sqrt{2} (3\sqrt{2} +\sqrt{14})=6+2\sqrt{7}

Thus the solution is irrational since square root 7 does not have a perfect square and equal to 6+2square root of 14

3 0
3 years ago
Read 2 more answers
What fraction is equal to .66?<br><br> A.1/3<br><br> B.1/5<br><br> C.2/3<br><br> D.2/4
photoshop1234 [79]
2/3 is the answer. 

<span>1/3 is equal to 33.33333333% </span>

<span>so 2/3 is equal to 66.6666666%</span>
8 0
2 years ago
Jennifer's movies are 70% comedies, she has 28 comedy movies. How many movies does she have in total?
Bond [772]
The answer is 40 movies
4 0
2 years ago
Other questions:
  • A large diamond with a mass of 4289.6 grams was recently discovered in a mine. If the density of the diamond is 3.51 grams over
    7·2 answers
  • Which variable expression represents the word phrase? the sum of 4 and the quotient of a number and
    13·2 answers
  • Question 1 (Essay Worth 10 points) (07.02 MC) The lengths of three sides of a trapezoid are shown below: Side 1: 11z2 − 4z + 2 S
    8·1 answer
  • What is 4 divided by 556​
    7·1 answer
  • 6th grade math help me please ! :))
    5·2 answers
  • Review the proof. Which step contains an error<br> Step 2<br> Step 4<br> Step 6<br> Step 8
    11·2 answers
  • The temperature at 3 a.m. was 3 1/2 degrees Fahrenheit. For the next 7 hours, the
    13·1 answer
  • Pls answer the first one to answer and get right will get Brainliest
    14·2 answers
  • Which property is used in the following expression ? 5(2 + 7) = 10 + 35
    6·1 answer
  • Can you please help me ​
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!