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r-ruslan [8.4K]
3 years ago
10

Find the measure of

Mathematics
1 answer:
JulsSmile [24]3 years ago
4 0
Angle A is 60 degrees
Explanation:
As the angle C is right angle( 90degrees)
using 49+ x^2= 196
x^2= 147
x= is approximately 12
against the smallest side is 30 degrees
against the biggest side is 90 degrees
against the middle side in length is 60 degrees
the middle length of side is approx. 12
so, A is 60 degrees
HOPE IT HELPS!!!!
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Kevin entered a pie eating contest. He ate 4 pies in 132 seconds. What is kwvibs unit rate.
Alika [10]
Ok the answer is 33 because 4/132 gives u 33
7 0
4 years ago
You are assigned 32 math exercises for homework. You complete 87.5 of these before dinner. How many do you have left to do after
VARVARA [1.3K]

Answer:

4

Step by step:

This is if the question is saying you completed 87.5% of the exercises. Otherwise, I don't know what it is asking.

87.5% of 32=28

32-28=4

6 0
3 years ago
The difference between 4 twenty fives and three twenty fives
-Dominant- [34]

Answer:

4 twenty fives is 100 and 3 twenty fives is 75

Step-by-step explanation:

Hope this help:)

7 0
3 years ago
Evaluate the given integral by changing to polar coordinates. 8xy dA D , where D is the disk with center the origin and radius 9
BabaBlast [244]

Answer:

0

Step-by-step explanation:

∫∫8xydA

converting to polar coordinates, x = rcosθ and y = rsinθ and dA = rdrdθ.

So,

∫∫8xydA = ∫∫8(rcosθ)(rsinθ)rdrdθ = ∫∫8r²(cosθsinθ)rdrdθ = ∫∫8r³(cosθsinθ)drdθ

So we integrate r from 0 to 9 and θ from 0 to 2π.

∫∫8r³(cosθsinθ)drdθ = 8∫[∫r³dr](cosθsinθ)dθ

= 8∫[r⁴/4]₀⁹(cosθsinθ)dθ

= 8∫[9⁴/4 - 0⁴/4](cosθsinθ)dθ

= 8[6561/4]∫(cosθsinθ)dθ

= 13122∫(cosθsinθ)dθ

Since sin2θ = 2sinθcosθ, sinθcosθ = (sin2θ)/2

Substituting this we have

13122∫(cosθsinθ)dθ = 13122∫(1/2)(sin2θ)dθ

= 13122/2[-cos2θ]/2 from 0 to 2π

13122/2[-cos2θ]/2 = 13122/4[-cos2(2π) - cos2(0)]

= -13122/4[cos4π - cos(0)]

= -13122/4[1 - 1]

= -13122/4 × 0

= 0

5 0
3 years ago
(3x-4y)^2-(3x-4y)(3x+4y)
zheka24 [161]

Answer:

-24xy + 32y^2

Step-by-step explanation:

Hello!

We can use the special binomial product formulas:

  • (a + b)^2 = a^2 + 2ab + b^2
  • (a + b)(a - b) = a^2 - b^2

<h3>Simplify</h3>
  • (3x - 4y)^2 - (3x - 4y)(3x + 4y)
  • (9x^2-24xy+16y^2) - (9x^2 - 16y^2)
  • 9x^2 - 9x^2 - 24xy + 16y^2 + 16y^2
  • -24xy + 32y^2

The simplified form is -24xy + 32y^2

6 0
2 years ago
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