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Harrizon [31]
3 years ago
10

*BRAIN TEASER*

Mathematics
2 answers:
Mademuasel [1]3 years ago
6 0

Answer:

idk but go dtep by step

Step-by-step explanation:

DedPeter [7]3 years ago
6 0

Answer:

2624

Step-by-step explanation:

Let the second digit be X. Therefore the first digit would be (1/3)X. The third digit would be 8-X and the fourth digit would be 8-X+2 or 10-X.

The last hint is that all the digits add up to 14, so

(1/3)X + X + (8-X) + (10-X) = 14

Solving for X gets you X = 6. If you plug the X value back in to satisfy the conditions, you get 2624.

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Suppose that the world's current oil reserves is R = 1820 billion barrels. If, on average, the total reserves
iVinArrow [24]

Answer:

A. R = -18t + 1,820

B. 1,568 billions of barrels

C. approximately 101.11 years

Step-by-step explanation:

To make our equation, we'll use the form R = mt + b. M represents how many billion barrels of oil are being lost each year, which we know is 18 billion. So -18 will be our m. B is how many total barrels of oil there are, which is 1,820. So 1,820 will be our b. Now the equation looks like this:

R = -18t + 1,820

We can use this equation to answer Part B.

Replace the t with 14:

R = -18(14) + 1,820

Now solve for R:

R = -18(14) + 1,820

R = -252 + 1,820

R = 1,568

14 years from now, there will be 1,568 billions of barrels left.

To solve part C, we need to find how many years it will take for all of the oil to be used up. After it's all used up, the total amount of oil will be 0, so we can replace R with 0 and then solve for t:

0 = -18t + 1,820

Subtract 1,820 from both sides to isolate -18t:

0 - 1,820 = -18t + 1,820 - 1,820

-1,820 = -18t

Divide both sides by -18 to isolate the t:

-1,820/-18 = -18t/-18

101.11 = t

After approximately 101.11 years, all of the oil will be used up.

3 0
2 years ago
What is the second step to solve this equation?<br> 5X-8=27
vesna_86 [32]

Answer:

The next step is to Divide 35 by 5  then solve for x

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
(x+3)²(65)=x(6)<br>Solve using quadric formula​
Angelina_Jolie [31]

Step 1: Simplify both sides of the equation.

  • 65x²+390x+585=6x

Step 2: Subtract 6x from both sides.

  • 65x²+390x+585−6x=6x−6x
  • 65x²+384x+585=0

For this equation: a=65, b=384, c=585

  • 65x²+384x+585=0

Step 3: Use quadratic formula with a=65, b=384, c=585

  • x=−b±√b2−4ac/2a
  • x=−(384)±√(384)2−4(65)(585)/
  • 2(65)
  • x=−384±√−4644/130

Therefore, There are no real solutions.

6 0
2 years ago
Read 2 more answers
What is the slope of a line that passes through (4,2) and (-2,4)
ycow [4]

Answer:

   Step One: Identify two points on the line.

   Step Two: Select one to be (x1, y1) and the other to be (x2, y2).

   Step Three: Use the slope equation to calculate slope.

Step-by-step explanation:

3 0
3 years ago
Find the x and y intercepts of the line<br><br><br> 2x+7y= -14
VladimirAG [237]
To do this make x and y equal 0, y-intercept is at x=0, and x-intercept is at y=0:
x-intercept:
2x+7(0) = -14
2x = -14
x = -7

y-intercept:
2(0) + 7y = -14
7y = -14
y = -2
7 0
3 years ago
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