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
Luba_88 [7]
3 years ago
15

Which expression is prime? A) x2 - 9 B) 1 - 9x2 C) 2a2 - 25 D) 4x2 - 9

Mathematics
2 answers:
mel-nik [20]3 years ago
4 0
I think the right anser would be (a)

Luden [163]3 years ago
3 0

Answer:

its c 2a2-25


Step-by-step explanation:


You might be interested in
Need Help ASAP
iren2701 [21]
The sum of the interior angles of a triangle is 180 degrees

2x-9+3x+x+3=180
6x-6=180
6x=186
x=31

A=2(31)-9
A=62-9
A=53
8 0
3 years ago
On Tuesday Conrad had 3 times as many sales as on Monday. On Wednesday, he had 9 times as many sales as on Monday. Over the thre
Vlad1618 [11]

Answer:

Conrad had 56 sales on Monday , 168 sales on Tuesday and 504 sales on Wednesday.

Step-by-step explanation:

Let x be the no. of sales on Monday

We are given that On Tuesday Conrad had 3 times as many sales as on Monday.

So, Conrad had sales on Tuesday = 3x

We are also given that On Wednesday, he had 9 times as many sales as on Monday.

So, Conrad had sales on Wednesday = 9x

Over the three days, he had a total of 728 sales

So, x+3x+9x=728

13x=728

x=\frac{728}{13}

x=56

Conrad had sales on Tuesday = 3x =3(56)=168

Conrad had sales on Wednesday = 9x=9(56)=504

Hence Conrad had 56 sales on Monday , 168 sales on Tuesday and 504 sales on Wednesday.

7 0
3 years ago
What is the measure of angle 3 if the measure of
ELEN [110]

Answer:

Angle 3 = 86.8

Angle 6 = 96.4

Angle 7 = 93.2

Step-by-step explanation:

Given :

angle 6 = 4x + 10

angle 7 = 2x + 40

=> angle 6 + angle 7 = 180° { linear pair }

=> 4x+10 +2x+40 = 180

=> 6x+50 = 180

=> 6x = 180-50

=> 6x = 130

=> x = 130/6

=> x = 21.6

so ,the measure of angle 6 = 4x + 10 = 4(21.6) +10 = 86.4+10 = 96.4

the measure of angle 7 = 2x + 40 = 2(21.6) +40 = 43.2+50 = 93.2

now angle 7 = angle 4 + angle 5

and angle 3 + angle 4 + angle 5 = 180°

so, angle 7 + angle 3 = 180

=> 93.2 + angle 3 = 180

=> angle 3 = 180 - 93.2

=> angle 3 = 86.8

8 0
2 years ago
What does x and y equal?​
Olegator [25]

Answer:

32 + x= 90

x= 90- 32 = 58

x + y = 90

38 + y= 90

y= 90-38

y = 52

Step-by-step explanation:

5 0
3 years ago
Which is equal to 7(3.5x10^4)written in scientific nation
k0ka [10]
The answer is 2.45 x 10^5. 

7 x 3.5 = 24.5

Move the decimal place over to the left until you have a number between 1 and 9 before the decimal point.

Add the number of times you moved the decimal point to the exponent (The 4 in the original equation).

2.45 x 10^5.

I hope this helps!

5 0
3 years ago
Other questions:
  • Please help i’m having a hard time answering it
    5·1 answer
  • F(x) = 2x2 + 9x<br> Find f(10)
    6·1 answer
  • Help me plz. 28 points. Dan and Wilbur each improved their yards by planting daylilies and geraniums. They bought their supplies
    5·1 answer
  • Consider the expression 63+81. How can you use the distributive property and the GFC to find an equivalent expression? Explain h
    11·1 answer
  • Calculate the diameter of a circle if it's circumference is 25.1
    6·1 answer
  • How many solutions can be found for the linear equation?
    7·1 answer
  • Y=1/2× find the rate of change ​
    13·2 answers
  • The terminal side of an angle in standard position passes through P(15,-8). What is the value of sin e?
    7·1 answer
  • Please just give me the answer to a and b I’ll give u a lot of points
    10·1 answer
  • You go to the Redbox to get 10 rentals for the weekend. Movies rent for $4 and video
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!