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
solong [7]
3 years ago
13

a system of equations is shown below: equation a: 2c = d − 8 equation b: c = 3d 8 which of the following steps should be perform

ed to eliminate variable d first? multiply equation b by 2. multiply equation a by 2. multiply equation b by 3. multiply equation a by −3.
Mathematics
1 answer:
Fofino [41]3 years ago
3 0
If you would like to know which of the following steps should be performed to eliminate variable d first, you can find this using the following steps:

equation a: 2c = d - 8      /*(-3)
equation b: c = 3d + 8
__________________
-6c = -3d + 24
c = 3d + 8
__________________
-6c + c = -3d + 24 + 3d + 8
-5c = 32
5c = -32
c = -32/5

<span>The correct result would </span>be: <span>multiply equation a by −3.</span>
You might be interested in
8. The volume of a box is 7923 cubic meters. If its base has an area of 57 square meters, what is its height?
Sergio039 [100]

Answer:

if the stone makes 150 revolution per minute, the tension force of the string on the stone is

5 0
3 years ago
A barrel of tomato sauce has spilled on a tile floor. The sauce flow can be expressed with the function r(t) = 2t, where t repre
IrinaVladis [17]
For the answer to the question above, I'll show my solution for the answer below.
Area A = pi r^2 
<span>The rate of change of area = d A/ d t = 2 pi r d r/d t </span>
<span>r= 2t, d r = 2 d t </span>
<span>This gives </span>
<span>d A/ d t = 2 pi 2t 2 d t = 8 pi t dt </span>
<span>Integrate it </span>
<span>A= 4 pi t^2. </span>
<span>After t=5, the area will be 100* 3.14 square= 314 square units.</span>
3 0
3 years ago
Read 2 more answers
Write the first five terms of the sequence. an=n2 +2​
Alla [95]

Answer:

The first five terms of the given sequence

3, 6, 11, 18, 27

Step-by-step explanation:

It is given that,

an=n² +2​

<u>To find the first five terms</u>

a₁ = 1² + 2 = 1 + 2 = 3

a₂ = 2² + 2 = 4 + 2 = 6

a₃ = 3² + 2 = 9 + 2 = 11

a₄ = 4² + 2 = 16 + 8 = 18

a₅ = 5² + 2 = 25 + 2 = 27

Therefore the first five terms of the given sequence

3, 6, 11, 18, 27

4 0
3 years ago
Which expression represents: twice a number increased by 39​
Cerrena [4.2K]

Answer:

2x+39

Step-by-step explanation:

8 0
2 years ago
A 100 inch strip of sheet metal starting out 16 inches wide is to be made into a small open trough (open top and ends) by turnin
daser333 [38]

Answer:

4 inches should be turned up on both sides.

Step-by-step explanation:

In order to find this, create a situation in which we give the amount turned up on each side as x. Then give the amount that isn't turned up as 16 - 2x (since 2x is the amount turned up). Now we can find the area by multiplying the 3 measurements.

100 * x * (16 - 2x) = MAX

100 * (16x - 2x^2) = MAX

-200x^2 + 1600x = MAX

Now that we have a quadratic function, we can find the maximum value of x by using the vertex formula for x values (-b/2a).

x = -b/2a

x = -1600/2(-200)

x = -1600/-400

x = 4

8 0
3 years ago
Other questions:
  • Write and solve a real world problem that can be represented by the expression (-3)(5)+10
    15·2 answers
  • A shirt costs $7.97 including tax, and
    9·2 answers
  • In a plane, if one of two parallel lines is _____ to another line, the other of the two lines is perpendicular to that line.
    14·2 answers
  • How do I solve this problem
    14·1 answer
  • Will give brainliest!! Create a rectangle around the parallelogram. The dimensions of this rectangle are . Find the area of the
    12·2 answers
  • If Shane and Susan both push on a box with a force of 25N, but in opposite directions, what will happen to the box?
    9·2 answers
  • Tom had 7/12 of a pizza. Hus liltle sister came along and took 2/5 of his pizza away. How much does tomhave left?
    7·2 answers
  • A) 6 square meters<br> B) 16 square meters <br> C) 28 square meters <br> D) 49 square meters
    6·1 answer
  • Which statement best describes the graph
    15·2 answers
  • Please help ,
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!