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
lyudmila [28]
3 years ago
10

System OT W + b =13 6.5w + 2b = 57.5

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

Answer:   w = 7,  x = 6

Step-by-step explanation:  Solve by substitution

W + b = 13

rewrite as   b = 13 - w  and substitute that value for b in the second equation

6.5w + 2b = 57.5  Then solve for w

6.5w + 2(13-w) = 57.5 . Distribute

6.5w + 26 - 2w = 57.5 .  Subtract 26 from both sides. Combine like terms and simplify

6.5w - 2w = 57.5 - 26

4.5w = 31.5  Divide both sides by 4.65

w = 7 . Substitute 7 for w in the first equation and solve for b

7 + b = 13 . Subtract 7 from both sides

b = 6

You might be interested in
Choose ALL possible answers
muminat
Select all the correct answers:
1) Yes

2) No
x=8→h(8)=2(8)^2+5(8)+2=2(64)+40+2=128+40+2→h(8)=170
x=8→f(8)=3^8+2=6,561+2→f(8)=5,563>170=h(8)

3) Yes

4) No

5) Yes
rg=[g(3)-g(2)]/(3-2)=[g(3)-g(2)]/1→rg=g(3)-g(2)
g(3)=20(3)+4=60+4→g(3)=64
g(2)=20(2)+4=40+4→g(2)=44
rg=64-44→rg=20

rf=f(3)-f(2)
f(3)=3^3+2=27+2→f(3)=29
f(2)=3^2+2=9+2→f(2)=11
rf=29-11→rf=18

rh=h(3)-h(2)
h(3)=2(3)^2+5(3)+2=2(9)+15+2=18+15+2→h(3)=35
h(2)=2(2)^2+5(2)+2=2(4)+10+2=8+10+2→h(2)=20
rh=35-20→rh=15

rg=20>18=rf
rg=20>15=rh

6)  No
x=4→g(4)=20(4)+4=80+4→g(4)=84
x=4→h(4)=2(4)^2+5(4)+2=2(16)+20+2=32+20+2→h(4)=54
x=4→f(4)=3^4+2=81+2→f(4)=83>54=h(4)
f(4)=83<84=g(4)
7 0
3 years ago
13x = 15x - 8 <br><br> What is the value of X?
maw [93]

Answer:x equals 4

Step-by-step explanation:

8 0
3 years ago
ARITHMETIC AND ALGEBRA REVIEW
klio [65]
42 inches of wire will cost 168 cents

Look at the pic to see how to set up the proportion.

8 0
3 years ago
HELP!!!ASAP!!!!DO IN 30 MIN!!! 7TH GRADE MATH
oksano4ka [1.4K]

Answer:

b

Step-by-step explanation:

big brain guess

5 0
3 years ago
Simon leans a 20 ft ladder against the side of his house so that the base of the ladder is
finlep [7]
The answer is 19.4
Most of the time when you try to find a missing length of a right triangle you use Pythagorean theorem. Pythagorean theorem is A squared plus B squared equals C squared. C squared is always going to be the longest length/diagonal line otherwise known as your hypotenuse. In this case the ladder is the hypotenuse. So instead of adding five squared +20 squared you’re going to square 20 and then subtract five squared to get the missing length which would be B squared and then you have to find the square root of B squared. So 20 squared is 4000. 5squared is 25 400-25 = 375 square root of 375 is about 19.4.

7 0
3 years ago
Other questions:
  • find the value of an investment of $3500 for 3 years at an interest rate of 5.6% if the money is compounded weekly
    5·1 answer
  • Find the simple interest p=$500 r=2% t=2 years The interest is $ ?
    15·1 answer
  • What is the answer pls give because I am stuck
    11·2 answers
  • A line includes the points (-7, -3) and (10, -6). What is it’s equation in slope-intercept form?
    14·1 answer
  • Consider the following sets:
    13·1 answer
  • If you are given a parallelogram with the top right and left corners each measuring 72* and the bottom right corner measuring 10
    9·1 answer
  • Which of the fractions shown has the greatest value?<br><br> 24<br><br> 47<br><br> 13<br><br> 49
    13·2 answers
  • 8(-4a + 8b) = 240please​
    14·1 answer
  • What is the unit rate for each size of peanut butter?
    10·1 answer
  • How to find the slope<br> (In general)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!