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]
3 years ago
12

Can someone please help me??

Mathematics
2 answers:
Fantom [35]3 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]3 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
Which of the following shows how to write 8,240 pennies as<br> dollars?
olasank [31]

Answer:

$ 82.40

Step-by-step explanation:

you divide

100 pennies in a dollar

8240/100=82.40

5 0
3 years ago
Reactant A can participate in both of these reactions:
user100 [1]
The activation energy is the amount of energy required to initiate a certain reaction. The activation energy may considered as an "energy barrier" that has to be overcome in order for a reaction to begin. If a reaction has a lower activation energy, then it will occur more easily and at a faster rate than a reaction with a higher activation energy. Therefore, the reason that reaction 1 is faster than reaction 2 is because it has a lower activation energy than reaction 2.
7 0
3 years ago
Read 2 more answers
the sum of three decimal numbers is 6 exactly one of the numbers is less than 1 what could the numbers be
sleet_krkn [62]
The 3 numbers could be 0.5, 1.1 and 4.4.

In the list above, there is only 1 number less than 1. It is 0.5.
The other 2 numbers are larger than 1.

If you add up the 3 numbers you will have exactly 6.

0.5 + 1.1 + 4.4 = 6
8 0
4 years ago
A spherical weather balloon is leaking hydrogen while at constant altitude. Its radius is described by
Brrunno [24]
Don’t know the answer to the question but I don’t know the answer question mark I don’t know what about it I don’t I don’t know I just really don’t know I don’t know the answer would help you but I don’t know
4 0
3 years ago
A taxi charges $7.50 plus $0.45 per mile.
poizon [28]
$7.50(2)=$15.00 (She takes the taxi twice, and its $7.50 each time she takes it)
$0.45(16)+$0.45(8)=$10.80 (Each mile is $0.45, she goes 16 miles on the way to work, and only 8 miles on the way home. Since she walks half way and  takes the taxi the other half. Half of 16 is 8)
$15.00+$10.80=$25.80
Alexis pays $25.00 per day for her taxi rides.
6 0
4 years ago
Other questions:
  • Convert r =-72/12+6 sin theta to Cartesian form.
    13·2 answers
  • Find the height of the pole if the shadow of a boy 6 ft. tall is 3 ft. and the shadow of the pole is 2 1/3 yards. 1 yards 4 feet
    8·1 answer
  • What is 2x if x is -3
    12·2 answers
  • :)))))) ))): what is the answer
    6·1 answer
  • How to find the circumference of a circle
    10·1 answer
  • I really need help please:)
    6·1 answer
  • Type an equation for the following pattern Help meee help meee help mee
    6·1 answer
  • Multiply.<br><br> (−7.3)(−0.08)<br><br> Enter your answer in the box.
    7·2 answers
  • The graph below represents which of the following functions?
    7·1 answer
  • \sqrt{32} <br> 32<br> ​<br> must lie between the whole numbers
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!