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umka21 [38]
3 years ago
10

Help doing test

Mathematics
1 answer:
Sphinxa [80]3 years ago
4 0

Step-by-step explanation:

2x^2+3x=20

5x^2=20

x^2=4

\times  = \sqrt{4}

x=2

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Find the answer and explain​
Lynna [10]

Answer: It would be I, the 4th one.

Step-by-step explanation:The 2 squares on the outside would fold up, that would leave the top and the 2 opposite sides left, so you would fold the other 3 squares on the bottom over the top, till it would cover all the other exposed sides.

Hopefully this makes sense!

4 0
3 years ago
Y = 1/6x + 8 <br><br> Identify the y intercept?
jeka94

Answer:

(0,8)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The acceleration of a Maserati (sports car) is proportional to the difference between 250 km/h and its velocity. If the car can
Igoryamba

Answer:

a) The differential equation for the velocity is given by

(dv/dt) = k(250 - v)

b) v(t) = 250 - e⁽⁵•⁵² ⁻ ᵏᵗ⁾

With units of km/h

Step-by-step explanation:

Acceleration, a ∝ (250 - v)

But acceleration is widely given as dv/dt

(dv/dt) ∝ (250 - v)

(dv/dt) = k(250 - v)

where k = constant of proportionality

(dv/dt) = k(250 - v)

b) (dv/dt) = k(250 - v)

dv/(250 - v) = k dt

∫ dv/(250 - v) = ∫ k dt

- In (250 - v) = kt + c (where c is the constant of integration)

v(0) = 0; meaning, at t = 0, v = 0

- In 250 = 0 + C

c = - In 250 = - 5.52

- In (250 - v) = kt - 5.52

In (250 - v) = 5.52 - kt

250 - v = e⁽⁵•⁵² ⁻ ᵏᵗ⁾

v = 250 - e⁽⁵•⁵² ⁻ ᵏᵗ⁾

With units of km/h

i hope this work for you

and sory if im wrang

4 0
2 years ago
a plane flew 187 miles from New York city, to Boston Massachusetts. it therefore 273 miles from Boston to Philadelphia, Pennsylv
azamat

Answer:

920 miles

Step-by-step explanation:

<em>Distance from New York City to Boston Massachusetts = 187 miles</em>

<em>Distance from Boston to Philadelphia, Pennsylvania = 273 miles</em>

Total Distance of one side = 187 + 273

Total Distance of one side = 460 miles

<em>The return distance will be the same that is 460 miles.</em>

Total Distance of both sides = 460 + 460

Total Distance of both sides = 920 miles

Therefore, the plane flew total 920 miles.

!!

4 0
4 years ago
Please help, I will give brainliest.
irina [24]
342-455x098%213/67900-3i2137890x$45
3 0
2 years ago
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