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
Stolb23 [73]
4 years ago
9

How to substitute 3x+3y=-3 and y=5x-1?

Mathematics
1 answer:
schepotkina [342]4 years ago
7 0
Since y = 5x-1, we can fill it into 3x + 3y = -3. First, let's look at relating to a simpler equation. Let's say that x + y = 9 and y = 3 + 5. Now, we can fill it in to get that x + (3 + 5) = 9. Now, we know that 3+5 is 8, so x + 8 = 9. Now, x = 1. Likewise, we can do the same. For 3x + 3y = -3, all we need to do is to switch the y in 3x + 3y = -3 with 5x - 1. So it would become 3x + 3(5x - 1) = -3. Now we distribute to get 3x + 15x - 3 = -3. Now add three to both sides to get 3x + 15x = 0. Now simplify to get 18x = 0. Now we know that x = 0. Now fill x into y = 5x - 1. So y = 5(0) - 1. Now we know that y = -1.

To check fill in the answer to 3x + 3y = -3.
3(0) + 3(-1) = -3
 0 + (-3) = -3
0 - 3 = -3
-3 = -3
Now that our check is completed we now know that x is 0 and y is -1.
You might be interested in
If a circle has a radius of 9 and a sector defined by a 254 degree arc, what is the area of the sector
myrzilka [38]
The answer is 179.451 or 1143π/20.

The arc is 254°.  A circle is 360°.  This means the arc makes up 254/360 of the circle.  We will multiply this fraction by the area of the circle, which is 

A = πr² = π(9)² = 81π = 254.34

81π(254/360) = 20574π/360 = 1143π/20 = 179.451
8 0
3 years ago
Please help what 100p
kondaur [170]
The correct answer is:  [C]:  " 1/4 " .
______________________________________________________
Explanation:
______________________________________________________

(-3/8) + (5/8) = (-3 + 5) / 8 = 2/8 ; 

→ 2/8 = (2÷2) / (8÷2) = 1/4 ;  → which is:  Answer choice:  [C]:  " 1/4" .
_______________________________________________________
7 0
3 years ago
Please answer correctly! I will mark you as Brainliest!
atroni [7]

Answer:

402 in^3

Step-by-step explanation:

We know that the volume of a sphere = 4 /3 πr^3

Variables:

r = 2in

Solve for 1 toy:

4 /3 πr^3

4/3 π (2in)^3

= 33.51 cubic inches for 1 toy

For 12 toys:

33.51 in^3 * 12 toys = 402.12 in^3 of water for all the toys

Round:

402.12 in^3 ≈ 402 in^3 of water

Please mark brainliest if this helped!

Please mark brainliest if this helped!

6 0
4 years ago
Thankyou for all the help
Travka [436]

Answer:

1. x + y = 180

2. x = 50 y= 130

Step-by-step explanation:

They're parallel.

We can label the unamed angle z.

So z = y

and 50 = x

There's 360 degrees in a circle, so x + y= 180 because it's half 360 and half a circle.

x=50

so 50 + 50 = 100.

360 - 100 = 260

so 260 ÷ 2 = 130

y = 130 because y and z are equal so they're the same number

8 0
3 years ago
Read 2 more answers
Scura makes sun block and their annual revenues depend on how much they sell. Let x be the quantity of 5 oz. bottles of sun bloc
harina [27]

Answer:

a) 50,000 bottles

b) x = 45

Step-by-step explanation:

We are given the following in the question:

The annual revenue of sun block depends on how much they sell.

Let x be the quantity of 5 oz. bottles of sun block that they make and sell each year measured in 1000 's of bottles.

For x = 10,

10,000 bottles were made and sell each year.

For x = 25,

25,000 bottles of sun block were made and sell each year.

a) x = 50

\text{Number of bottles} = 50\times 1000 = 50,000

Thus, 50,000 bottles of sun block does Scura make and sell.

b) Scura produces and sells 45000 bottles of sunblock

We have to find the value of x

x = \displaystyle\frac{\text{Number of bottles}}{1000} = \frac{45000}{1000} = 45

Thus, x = 45 if Scura produces and sells 45000 bottles of sunblock.

8 0
3 years ago
Other questions:
  • 9 * 10^2 - 5.54 * 10^4
    15·1 answer
  • A moving walkway at an airport moves at a pace of 1.75 feet per second. If you stand on the walkway as it moves, how long will i
    13·1 answer
  • O is the center of the circle. Assume that lines that appear to be tangent are tangent. What is the value of x?
    11·2 answers
  • I kinda forgot my trig (kinda)
    9·1 answer
  • Janine found a perfect sundress for 30% off. The original price, before tax, was $60. What was the sale price of the dress befor
    13·1 answer
  • Please define the following terms:<br><br> 1. Table<br> 2. Column<br> 3. Row<br> 4. Cell
    5·1 answer
  • 5,000 people visited a bookfair in the first week. The numbers increased by 10% in the second week. how many people visited the
    12·1 answer
  • Solve the proportion 6/y=9/24
    14·2 answers
  • 13 - 3( x + 2 ) + 5x = 29<br><br> Solve for x
    13·2 answers
  • Answer number 2 please
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!