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
Korvikt [17]
3 years ago
9

Evaluate 2x^2-1 when x=3 A) 5 B) 17 C) 25 D) 35

Mathematics
2 answers:
natulia [17]3 years ago
8 0

Answer:

Step-by-step explanation:

gayaneshka [121]3 years ago
6 0
The answer to the question is b
You might be interested in
The length of a rectangle is 5 inches longer than it is wide. If the area is 150 square inches, what are the dimensions of the r
ikadub [295]

Answer:

Width: 10 inches

Length: 15 inches

Step-by-step explanation:

Let the width be w.

Since the length is 5 inches longer than its width, the length = w +5.

Area of rectangle = length x width

w (w +5) = 150

w^2 + 5w = 150

w^2 + 5w -150 = 0

Using quadratic formula,

w = 10 or -15

Since the width cannot be negative,

the width is 10 inches.

Now just substitute w=10 into length = w +5.

length = 10 + 5

= 15 inches

5 0
3 years ago
Read 2 more answers
Someone please help me out I rlly need help
Anit [1.1K]

The equation that could be used to solve for x is (3x-1) = 140 and the value of x is 47°.

According to the question,

We have the following information:

We have two lines that are intersecting each other at a point. The angles made on this point are given.

Now, we know that these two angles are vertically opposite angles. And we also know that vertically opposite angles are equal.

So, we will have the following equation:

3x-1 = 140

Now, we can easily find the value of x from this equation:

Adding 1 on both sides of the equation:

3x = 140+1

3x = 141

Dividing by 3 on both sides:

x = 141/3

x = 47°

Hence, the equation that could be used to solve for x is (3x-1) = 140 and the value of x is 47°.

To know more about equation here

brainly.com/question/18067015

#SPJ1

5 0
1 year ago
PLEASE HELP ME!
Tatiana [17]

Answer:

TRUE

Step-by-step explanation:

2x + 0.8/y = z – 4

x = 7, y = 0.2, z = 22

2×7  + 0.8/0.2 = 22 - 4

            14 + 4 = 18

                  18 = 18

TRUE.


6 0
3 years ago
A restaurantis planning to make changes to its menu. In order to decide which potential menu items are most popular with the cit
Alex

Answer:

Simple random sampling survey method

Step-by-step explanation:

A simple random sampling is an unbiased survey technique Hence it will represent all the parts of the city's population.

In statistics, a simple random sample is a subset of individuals (a sample) chosen from a larger set (a population). Each individual is chosen randomly and entirely by chance, such that each individual has the same probability of being chosen at any stage during the sampling process

6 0
3 years ago
What is 6+14r-12r+3?
Ugo [173]
<span><span><span>6+<span>14r</span></span>−<span>12r</span></span>+3

</span><span>=<span><span><span><span>6+<span>14r</span></span>+</span>−<span>12r</span></span>+3

</span></span>Combine Like Terms:

<span>=<span><span><span>6+<span>14r</span></span>+<span>−<span>12r</span></span></span>+3

</span></span><span>=<span><span>(<span><span>14r</span>+<span>−<span>12r</span></span></span>)</span>+<span>(<span>6+3</span>)

Your answer would be:
</span></span></span><span><span><span>
2r</span>+<span>9

~Good Luck~</span></span></span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • If a/x + 1 = c/x which is an expression for x terms in terms of c and a?
    6·1 answer
  • a certain recipe calls for 3 2/3 cups of sugar. If the recipe is to be doubled how much sugar should be used?
    8·1 answer
  • Q5: The probability that event A occurs is 5/7 and the probability that event B occurs is 2/3 . If A and B are independent event
    5·1 answer
  • Which expressions are equivalent to 5(-2k-3)+2k
    9·1 answer
  • What are the next 2 terms in the sequence -9,-8,-4, 5, 21, 46,
    10·1 answer
  • PLEASE HELP ME THANKS​
    5·1 answer
  • Consider lines An and CD
    14·1 answer
  • Write the equation for the graph below in point-slope form. Help me
    7·1 answer
  • Which of the following is not the same as positive 7?
    12·2 answers
  • Gabrielle is 10 years younger than Mikhail. The sum of their ages is 74. What is Mikhail's age?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!