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
xxMikexx [17]
3 years ago
10

5a - 24b =-15 10a + 45c =21 48b + 35c = 49

Mathematics
1 answer:
andrew-mc [135]3 years ago
6 0

5a + 15 = 24b so,

10a + 30 = 48b,

sub to third equation,

10a + 30 + 35c = 49

10a + 35c = 19

perform elimination with second equation

10a + 45c = 21

10a + 35c = 19

________________-

10c = 2

c = 1/5

sub to second equation,

10a + (45)(1/5) = 21

10a + 9 = 21

10a = 12

a = 6/5

sub to first equation

(5)(6/5) - 24b = -15

6 + 15 = 24b

21 = 24b

b = 7/8

redo the calculations, correct me if I'm wrong

You might be interested in
Kit bought a soft drink and a sandwich for 9.00 what was the price of each ifnthe sandwich cost 3.5 times as much as the soft dr
Annette [7]

Answer:

Sandwich = 6.75

Soft drink = 2.25

Step-by-step explanation:

9.00/4 = 2.25

2.25*3=6.75


8 0
2 years ago
A toxic radioactive substance with a density of 7 milligrams per square centimeter is detected in the ventilating ducts of a nuc
uysha [10]
For this case we have an equation of the form:
 y = A * (b) ^ t
 Where,
 A: initial amount
 b: decrease rate
 t: time in years.
 Substituting values we have:
 7 = A * (0.5) ^ ((1/20) * t)
 For t = 45 years we have:
 7 = A * (0.5) ^ ((1/20) * 45) 
 Clearing A:
 A = 7 / ((0.5) ^ ((1/20) * 45))
 A = 33.3
 Answer:
 
the density of the substance when it was deposited 45 years ago was:
 
A = 33.3 milligrams per square centimeter
5 0
3 years ago
Simplify equation (4 3i)(1 2i)
MrRa [10]
1 times 4 =4 then 5i  
Equation:
5i + 4
3 0
3 years ago
The drawing below shows circle B and circle E.Which equation best describes the relationship between BC and EF?
Svet_ta [14]

Answer:

BC = 3(EF)

Step-by-step explanation:

The question stated that AC is 3 times the length of DF.

7 0
2 years ago
Read 2 more answers
Find Z for the following sequence:<br> 210, 209, 213, 186, 202, Z
nikklg [1K]

Answer:

77

Step-by-step explanation:

as far as I can tell the steps between the given numbers are

-1

+4

-27

+16

1 can be expressed as 1³

4 can be expressed as 2²

27 can be expressed as 3³

16 can be expressed as 4²

my best guess is that next one is minus 5³ = -125

edit: technically the given steps can be expressed as

(-1)³

(-2)²

(-3)³

(-4)²

somewhat nicer pattern there

7 0
3 years ago
Other questions:
  • Find the area of the irregular shape
    9·2 answers
  • The measure of an exterior angle of a regular polygon is 15°. What is the sum of the measures of the interior angles of the poly
    6·1 answer
  • If f(x) is a linear function, what is the value of n?
    13·2 answers
  • Danny wants to build a deck with an area of at least 120 square feet. He has space for a length of up to 14 feet, but no more th
    6·1 answer
  • Help me please I am stuck
    10·1 answer
  • What is the formula for the confidence interval? Then, define what each variable represents.
    15·1 answer
  • What is the standard form of the equation of a circle with the radius ( r=6) and the center (h,k)= (0,0)?
    6·1 answer
  • -4y-5&gt;-6+7 with steps please ​
    7·1 answer
  • Find the slope of the line that passes through (10, 10) and (1, 14).​
    11·1 answer
  • The distance between point (-6,-4) and (-6,5)
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!