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
forsale [732]
2 years ago
12

Can someone please help me??

Mathematics
2 answers:
Fantom [35]2 years ago
3 0

Answer:

b=3, y=6

Step-by-step explanation:

Label the 2 equations:

2b +6y= 42 -----(1)

2b +4y= 30 -----(2)

(1) -(2):

(2b +6y) -(2b +4y)= 42 -30

2b +6y -2b -4y= 12

2y= 12

y= 12 ÷2 <em>(</em><em>÷</em><em>2</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>)</em>

y= 6

Susbt. y=6 into (2):

2b +4(6)= 30

2b +24=30

2b= 30 -24 <em>(</em><em>-24</em><em> </em><em>on</em><em> </em><em>b</em><em>o</em><em>t</em><em>h</em><em> </em><em>sides</em><em>)</em>

2b= 6

b= 6 ÷2

b= 3

Alekssandra [29.7K]2 years ago
3 0

Answer:

y = 6, b = 3

Step-by-step explanation:

Since both equations have 2b in them, subtracting them gets you a quick result because the 2b-2b cancels out!

2b + 6y = 42

2b + 4y = 30

------------------ -

       2y = 12

         y = 6

Then 2b = 42 - 36 = 6, so b = 6/2 = 3

You might be interested in
The manager of a store increases the price of a popular product by 5%. Let y be the original price of the product. The new price
Sphinxa [80]

Answer:

you will multiply the new price plus the original price

5 0
2 years ago
Someoneee pleaseee helpp!!!
Tju [1.3M]

Answer:

(x, y ) → (x + 6, y + 12 )

Step-by-step explanation:

We require to determine the horizontal and vertical shift to go from one of the points on the line to the corresponding point on the image

Consider point V with x- coordinate - 8 and y- coordinate - 2

The corresponding point is V'

with x- coordinate - 2 and y- coordinate 10

Thus V → V' is 6 units right in the horizontal direction and 12 units up in the vertical direction.

These are the same shifts for W → W'

Thus the translation rule is

(x, y ) → (x + 6, y + 12 )

8 0
3 years ago
In the nocturnal house at the zoo, there are 4 bats for every 3 spiders. If there are 112 bats and spiders, how many are bats? H
In-s [12.5K]

Answer:

9

Step-by-step explanation:

hehsn. iuxxj y eiwyaoa

5 0
3 years ago
The length of a rectangle is 4 ft longer than its width.
son4ous [18]

Answer:

96

Step-by-step explanation:

40=4x+8

32=4x

x=8

other side x+4 is 12

area is 12×8

96

6 0
2 years ago
Three high school participated in a study to evaluate the effectiveness of a new computer-based mathematics curriculum. Four 24-
snow_tiger [21]

Answer:

A) experimental

B)  The important factors are : Type of instruction, scores and  High schools,

   The factor levels are :

   Level -1 which comprises of  3 highschool,

   Level -2 which comprises of  highschool and the highschool has  4   sections   and each section has 24 students

   Factor level combinations:

  Level 1 : computer and standard based combination

C) Within the subject : 24 students

   Between subject : High school

D) score of the test

E) student

Step-by-step explanation:

A) The study is experimental because of the random assignment of two different types of instruction to the students which will control/affect the technique of teaching without just observing the performance of the students from the side

B) The important factors are : Type of instruction, scores and  High schools,

   The factor levels are :

   Level -1 which comprises of  3 highschool,

   Level -2 which comprises of  highschool and the highschool has  4   sections   and each section has 24 students

   Factor level combinations:

  Level 1 : computer and standard based combination

C) Within the subject : 24 students

   Between subject : High school

D) The dependent measure  is the score of the test

E) The basic experiment unit of the study is : student

 

8 0
3 years ago
Other questions:
  • Work out the surface area of this sphere.<br> Give your answer to 1 decimal place.
    14·1 answer
  • This graph represents a quadratic function. What is the function’s equation written in factored form and in vertex form?
    9·1 answer
  • The slope-intercept form of an equation y=mx+b. Which equation is correctly solved for the slope, m
    11·1 answer
  • 3х + 9y - 8x - 2y +7​
    9·1 answer
  • NEED ASAP!!
    5·2 answers
  • Can someone please help me ​
    14·2 answers
  • Can you please help me I’m having such a bad brainwash right now I really really need help
    10·1 answer
  • Which multiplication problem does the model represent?
    6·1 answer
  • 166. Запишите все целые числа, расположенные на координатной прямой между числами:
    9·1 answer
  • 5 Eric is building a fence around the perimeter of a garden in his backyard. The yard is shaped like a rectangle with a width of
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!