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
tamaranim1 [39]
3 years ago
14

No clue how to do this

Mathematics
1 answer:
andreev551 [17]3 years ago
7 0

B is your awnser! sorry if im wrong my calc shows its without a  - symbol

You might be interested in
The mean number of sick days per employee taken last year by all employees of a large city was 10.6 days. A city administrator i
Vsevolod [243]

Answer:

H0:μ=10.6

Ha:μ≠10.6

Step-by-step explanation:

you do not find out about the 12.9 until after stating the hypothesis.

7 0
3 years ago
Can someone help me pls
VLD [36.1K]

Answer:

-12

Step-by-step explanation:

Since a = -6,we have to multiply 2 and -6,and you get -12 bc we have to put the sign of the bigger digit which is -6 in this problem,so you have to write -12

4 0
2 years ago
The area of a circle is 78.5 cm² . Find the lenght of the radius of a circle . Use π = 3.14
Tpy6a [65]

Answer:

5cm  = r

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

78.5 = 3.14 r^2

Divide each side by 3.14

78.5/ 3.14 = r^2

25 = r^2

Take the square root of each side

sqrt(25) = sqrt(r^2)

5 = r

6 0
3 years ago
Read 2 more answers
write the equation of a line that is perpendicular to the given line and that passes through the given point. y-4=5/2(x+3) ; (-7
faltersainse [42]
The gradient of the perpendicular line would be the negative reciprocal of the original line. Therefore the gradient of the perpendicular line would be -2/5x.
Since we know y=mx+c, ∴y=-2/5x+c. Sub in the x and y values of the given point and we get that c=26/5.

The perpendicular equation would be y=-2/5x+26/5.
I hope I got this right.
7 0
3 years ago
Read 2 more answers
Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5​
Bond [772]

Answer:

The solution to the equation system given is:

  • <u>x = 2</u>
  • <u>y = -1</u>

Step-by-step explanation:

First, we must know the equations given:

  1. 2x + 3y = 1
  2. 3x + y = 5​

Following Crammer's Rule, we have the matrix form:

\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]

Now we solve using the determinants:

x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2

y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

  • 2x + 3y = 1
  • 2(2) + 3(-1)= 1
  • 4 - 3 = 1
  • 1 = 1

And, with the second equation:

  • 3x + y = 5​
  • 3(2) + (-1) = 5
  • 6 - 1 = 5
  • 5 = 5

 

4 0
2 years ago
Other questions:
  • If you eat one quarter of a pizza and your dog eats one eighth of it what percent is left over
    8·2 answers
  • Which equation can be used to solve for c? Triangle A B C is shown. Angle A C B is 90 degrees and angle A B C is 35 degrees. The
    5·2 answers
  • How much money did mme. sofronie pay della for her hair? a $30 b $10 c $20 d $40?
    8·1 answer
  • Elaine bought a total of 15 shirts and pairs of pants she bought 7 more shirts than the pants how many of each did she buy
    10·1 answer
  • A zookeeper predicted that the weight of a newborn lion would be 2.8 pounds. when the zoo's lion gave birth, the newborn weighed
    14·2 answers
  • Please help me asap this is due in 10 min Ill also mark brainliest
    10·1 answer
  • Select the correct answer.
    5·2 answers
  • Help with math word problem grade 9 level
    5·1 answer
  • A company paid ​$211.00 for an item. The original price was​ $299.20​, but this was marked down 40​%. If the operating expenses
    11·1 answer
  • Hi people! Can you help me figure this out? I'll mark brainliest!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!