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Ket [755]
3 years ago
8

Explain how to estimate 368+231 in two ways

Mathematics
2 answers:
VLD [36.1K]3 years ago
8 0
1st way= Round your SUM to the closest. Example: 44 is close to 40 since its not 45 yet.
DiKsa [7]3 years ago
7 0
1st way. 368 is closest to 370
2nd way. 231 is closest to 230
3rd way. Your sum will be 699, Closest to 700.
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Help plz I’ll mark brainliest
motikmotik

Answer:

D

Step-by-step explanation:

7 0
3 years ago
Identify the surface with the given vector equation. r(s, t) = s sin 4t, s2, s cos 4t
k0ka [10]

Answer:

Circular paraboloid

Step-by-step explanation:

Given ,

r(s,t)=ssin4t,s^2,scos4t

Here, these are the respective x,y,z axes components.

  • <em>Component along x axis r_i : ssin4t</em>
  • <em>Component along y axis r_j : s^2</em>
  • <em>Component along z axis r_k : scos4t</em>

We see that , from the parameterised equation , r_i^2+r_k^2=s^2sin^24t+s^2cos^24t\\r_i^2+r_k^2=s^2\\r_i^2+r_k^2=r_j

This can also be written as :

x^2+z^2=y

This is similar to an equation of a parabola in 1 Dimension.

By fixing the value of z=0,

<u><em>We get y=x^2 which is equation of a parabola curving towards the positive infinity of y-axis and in the x-y plane.</em></u>

By fixing the value of x=0,

<u><em>We get y=z^2 which is equation of a parabola curving towards positive infinity of y-axis and in the y-z plane. </em></u>

Thus by fixing the values of x and z alternatively ,  we get a <u>CIRCULAR PARABOLOID. </u>

4 0
3 years ago
How long is each side of a square that has an area of 25 meters?
Sergio [31]
The square root of 25 is 5, so each side is 5metres x
4 0
3 years ago
Read 2 more answers
Which relationship exists between the two angles? What is the value of x? Find the measure of each angle.
BigorU [14]

Answer:


D alternate means on opposite sides of the transversal and exterior means outside the two parallel lines. You should have been given


7 0
3 years ago
PLS HELP ME PLS ANYONE I HAVE TO SUBMIT THIS AS SOON AS POSSIBLE PLS PLS PLS!!!!!!!!!!!!!!!!!
Digiron [165]

Answer:

Side length = 5.8 in

Perimeter = 29

Area = 58 in²

Step-by-step explanation:

✔️Find Side length using trigonometric ratio:

Angle at center of a pentagon is always 36° (we have measure of a full circle, 360, divided by 10 smaller triangles = 36°)

So:

Reference angle = 36°

Adjacent side = 4 in.

Opp = ½ of the side length of the polygon = x (let's represent this as x)

Thus, apply TOA:

Tan 36 = Opp/Adj

Tan 36 = x/4

4*Tan 36 = x

x ≈ 2.9 in (nearest tenth)

Side length = 2*x = 2*2.9 = 5.8 in

✔️Perimeter = 5*side length

Perimeter = 5*5.8 = 29 in

✔️Area = ½aP

Where,

a = 4 in

P = 29

Plug in the values

A = ½*4*29

A = 58 in²

8 0
3 years ago
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