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3 years ago

2020-1937 plz hurry

Mathematics

2 answers:

Mekhanik [1.2K]3 years ago

7 0

Answer:

u subtract 1937 from 2020 and u get dis

kolbaska11 [484]3 years ago

3 0

Answer:

Step-by-step explanation:

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Suppose a railroad rail is 6 kilometers and it expands on a hot day by 20 centimeters in length. Approximately how many meters w

sukhopar [10]

Answer:

Step-by-step explanation:

Given that the railroad rail is 6 kilometers before expansion.

When the railroad expands, it makes an isosceles triangle at the center of the rail.

The base of the triangle is 6 kilometers while each leg of the triangle is given by (6 + 10/100,000) / 2 = 6.0001 / 2 = 3.00005 kilometers.

[recall that 100,000 centimeters gives 1 kilometers, thus 10 centimetres gives 10/100,000 kilometers]

Taking one half of the isoceles triangle, we have a right triangle with one of the leg as 6 / 2 = 3 kilometers and the hypothenus = 3.00005 kilometers.

Thus, using the Pythagoras theorem, we find the other leg (height) of the right triangle as follows.

Let the other leg of the right triangle be h, then

Thus, the center of the rail will rise 0.01732058 kilometers above the ground.

But, there are 1,000 meters in 1 kilometers, therefore, the center of the rail will rise 0.01732058 x 1,000 = 17.32 meters above the ground.

5 0

4 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

weqwewe [10]

Answer: B

Step-by-step explanation:

Evaluate each choice. Notice that f(x) is a positive parabola with vertex at (-3, -49) and g(x) is exponential growth.

A) False

rate of f(x) decreases and rate of g(x) increases. So, f(x) > g(x)

B) True

y-intercept of f(x) is -40 and y-intercept of f(x) is 20. So, f(x) < g(x) Note: the y-intercept is when x = 0

C) False

f(x) is decreasing before the vertex and increasing after the vertex. g(x) is increasing because it is exponential growth.

D) False

f(1) =13.3 (when x = 1) and g(-1) = -33 (when x = -1). So, f(1) > g(-1)

8 0

4 years ago

5. Melissa bought a pencil for $0.34, an eraser

Verdich [7]

Answer: 1.55 (1.54 is the real price she bought it at so this is a reasonable estimation)

Step-by-step explanation: You can estimate the 98 cents at 1 dollar and the 22 cents at 20 cents and the 34 cents at 35 cents then add them all together: 0.20+0.35+1=1.55

If you need any further help or instruction let me know!

7 0

3 years ago

Read 2 more answers

Line CD passes through points (0, 2) and (4, 6). Which equation represents line CDI

Kryger [21]

Answer:

y = x + 2

Step-by-step explanation:

First, find the rate of change [slope]:

-y₁ + y₂\-x₁ + x₂ = m

$\frac {-2 + 6}{0 + 4} = \frac{4}{4} = 1$

Then use the Point-Slope Formula since we are given points. Now, according to this formula, all negative symbols give the OPPOSITE terms of what they really are, so be EXTREMELY careful inserting the coordinates into the formula with their CORRECT signs. It does not matter which one you choose:

y - y₁ = m(x - x₁)

y - 6 = x - 4

+ 6 + 6

_______________

y = x + 2 >> Line in Slope-Intercept Form

__________________________________________________________

y - 2 = x

+ 2 + 2

______________

y = x + 2 >> Line in Slope-Intercept Form

** You see? I told you that it would not matter which ordered pair you choose because you will always get the exact same result!!!

I am joyous to assist you anytime.

4 0

3 years ago

Read 2 more answers

10. Given Triangle GHI with G(7, 0), H (-5, 5) and I (1, 9), find the slope of HI.

Y_Kistochka [10]

H = (-5,5)
I = (1,9)

slope formula : (y2 - y1) / (x2 - x1)
slope = (9 - 5) / (1 - (-5) = 4 / (1 + 5) = 4/6 reduces to 2/3 <==

3 0

4 years ago

2020-1937 plz hurry​

2020-1937 plz hurry