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
Monica [59]
3 years ago
10

Can anyone help me with this?

Mathematics
1 answer:
Semmy [17]3 years ago
6 0

Step-by-step explanation:

for a it's y=12x+60

for b it's y=1x+21

for c it would be) 40-70=-30/1-3=-2 and then divide -30/-2 is 15.

for d it would be y=20x+20

it would be ethier a or d

You might be interested in
jenelle makes $7.25 an hour at the flower shop write an inequality to find out how many hours you was work to earn at least $125
faust18 [17]
Hmmmmm I don't know key maw think
3 0
3 years ago
A population is estimated to have a standard deviation of 9. We want to estimate the population mean within 2, with a 99% level
cupoosta [38]

Answer:

The sample required is  n = 135

Step-by-step explanation:

From the question we are told that

     The  standard deviation is  \sigma = 9

      The margin of error is E =  2

     

Given that the confidence level is  99%  then the level of  significance is mathematically evaluated as

         \alpha =  100-99

        \alpha =  1 \%

        \alpha =  0.01

Next we will obtain the critical value  \frac{\alpha }{2} from the normal distribution table(reference  math dot armstrong dot edu) , the value is  

             Z_{\frac{\alpha }{2} } =  Z_{\frac{0.05 }{2} } =  2.58

The  sample size is mathematically represented as

          n = [ \frac{Z_{\frac{\alpha }{2} } *  \sigma }{E} ]^2

substituting values

           n = [ \frac{ 2.58 *  9 }{2} ]^2

            n = 135

3 0
3 years ago
Triangle Q R S is shown with exterior angles. Line R Q extends through point D. Line Q R extends through point E. Line Q S exten
Yanka [14]

Answer:

its going to be qsr just took the test on edg

Step-by-step explanation:

test taken

3 0
3 years ago
Read 2 more answers
-6x^2-5x-5=<br> −6x <br> 2<br> −5x−5=<br> \,\,-4x^2<br> −4x <br> 2
aev [14]

Answer:

what is the question? it's not clear

3 0
3 years ago
Rectangle PQRS is shown with its diagonals, PR and QS. 
gizmo_the_mogwai [7]
The answer is C. Isosceles Triangle .... 2 of the sides are equal
6 0
3 years ago
Read 2 more answers
Other questions:
  • Please help me, thank you!!
    12·1 answer
  • Alice Jones worked 32 hours this week. She paid $4.00 per hour. She also earned $250 in tips. What is Alices gross pay for this
    7·1 answer
  • If the perimeter of the semicircle is 10.28mm. What is the semicircles radius?
    11·1 answer
  • A composition of two isometries results in __________.
    7·2 answers
  • What would be the scale factor?
    13·1 answer
  • Pls help ( 45 points )
    14·1 answer
  • Nathan is a cat enthusiast! He currently cares for 4 different cats. He adopts 2
    8·1 answer
  • Which fraction and decimal forms match the long division problem? 9) 8.000 7 21 80 72 80 72 8 8 A. and 0.8 9 B. 8 and 0.8 O 9 C.
    6·2 answers
  • Incorrect
    5·1 answer
  • Do you guys know how to find a square root or cube root without a calculator? I need a explanation and a example.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!