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
Bogdan [553]
3 years ago
7

If x =4 calculate the value of 2x squared - 5

Mathematics
1 answer:
Vlad1618 [11]3 years ago
3 0
<span>2x squared - 5 
= 2(x)^2 - 5
= 2(4)^2 - 5
= 2(16) - 5
= 32 - 5
= 27</span>
You might be interested in
The diagram shows a right-angled triangle.
Ratling [72]
Where is the diagram?
4 0
3 years ago
Square ABCD is located on a coordinate plane. The coordinates for three of the vertices are listed below.
Marrrta [24]

Answer:

B'(16,14)

Step-by-step explanation:

First find the coordinates of the vertex B. The center of the square M is the midpoint of the diagonal AC. Since A(2,7) and C(8,1), the center has coordinates

M\left(\dfrac{2+8}{2},\dfrac{7+1}{2}\right)=M(5,4).

Point M is also the midpoint of the diagonal BD. Let B has coordinates (x,y), then

\dfrac{x+2}{2}=5\Rightarrow x=8,\\ \\\dfrac{y+1}{2}=4\Rightarrow y=7.

Hence, B(8,7).

Now, the dilation by a scale factor 2 with the center of dilation at the origin has the rule

(x,y)→(2x,2y).

Thus,

B(8,7)→B'(16,14).

8 0
3 years ago
What is the equation of the line described below written in slope-intercept form? the line passing through point (0, 0) and para
Igoryamba
Y=-1.5x or y=-(3/2)x
5 0
3 years ago
Read 2 more answers
8x+3=8x I need help
ANEK [815]
X=5/8 that is the answer lol
5 0
3 years ago
Can someone please help me I’m struggling
blagie [28]

Answer:

point form is (2,-1), equation form is x= 2, y=-1

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • the ebola virus has an infection rate of 11% per day as compared to the SARS virus, which has a rate of 4% per day. If there wer
    11·1 answer
  • 3x-5=2(2x+5) how do you slove it
    9·1 answer
  • The softball team has won 7 of their last 8 games.
    11·2 answers
  • Sketch the region enclosed by y=e3x,y=e5x and x=1. Decide whether to integrate with respect to x or y, and then find the area of
    13·1 answer
  • Two gallons of gasoline cost $7.96, 5 gallons cost $19.90, and 12 gallons cost $47.76. Which equation gives the total cost y of
    7·2 answers
  • Help me I’m confused help I’ll give 15 points
    14·1 answer
  • A nature center has a fish tank in the shape of a rectangular prism. The tank is 10 feet long, 8 ¼ feet wide, and 6 feet tall. T
    5·2 answers
  • a group of students went hiking in wildlife sanctuary. during the hike a total of 180 ticks and mosquitoes were slapped. if thes
    14·1 answer
  • How far does a horse travel if it gallops at an average speed of 25 km/h for 30 min?
    15·1 answer
  • Answer.. below: . . .
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!