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Roman55 [17]
2 years ago
10

If sin2M = COS2N and m N= 30°, what is the measure of _M? 150° 90° 60° 30°

Mathematics
1 answer:
telo118 [61]2 years ago
8 0

Answer:

below

Step-by-step explanation:

n = 30

cos 2*30 = cos 60 = 1/2

sin 30 = 1/2

2m = 30

m=15

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Matrix A is said to be involutory if A2 = I. Prove that a square matrix A is both orthogonal and involutory if and only if A is
goblinko [34]

Answer:

4 · 1/4 (I-0) = (A-0)∧2

see details in the graph

Step-by-step explanation:

Matrix A is expressed in the form A∧2=I

To proof that Matrix A is both orthogonal and involutory, if and only if A is symmetric is shown by re-expressing that

A∧2=I in the standard form

4 · 1/4 (I-0) = (A-0)∧2

Re-expressing

A∧2 = I as a graphical element plotted on the graph

X∧2=I

The orthogonality is shown in the graphical plot displayed in the picture. Orthogonality expresses the mutually independent form of two vectors expressed in their perpendicularity.

7 0
3 years ago
2x^2-5xy-y^3 if x=-3, and y=-2
docker41 [41]

2x^2-5xy-y^3 if x=-3, and y=-2

2(-3)^2- 5(-3)(-2) -(-2)^3

=2(9) - 5(6) - (-8)

= 18 - 30 + 8

= -4

8 0
3 years ago
How many L of A 90% saline solution must be mixed with 4 L of a 50% saline solution to make a 74% solution ?
insens350 [35]

Answer:

6 L

Step-by-step explanation:

Given two solutions:

1st solution is 90% saline solution. Let the volume of this solution be x litres.

2nd solution is 50% saline solution. Volume of this solution = 4 L

Resultant solution is 74% saline.

To find:

The volume of 1st solution = ?

Solution:

Total volume of the 74% saline mixture = (4+x) Litres

We can write equation here, as per the percentage of saline in the mixtures.

90% of x L + 50% of 4 L = 74% of (x+4)

\Rightarrow \dfrac{90x}{100} + \dfrac{50}{100}\times 4 = \dfrac{74}{100}\times (x+4)\\\Rightarrow 90x + 200 = 74x+296\\\Rightarrow 90x-74x = 296-200\\\Rightarrow 16x = 96\\\Rightarrow x = \bold{6\ L}

Therefore, the volume must be <em>6 L</em>.

8 0
3 years ago
The annual tuition at a specific college was $20,500 in 2000, and $45,4120
allochka39001 [22]

Answer:

Step-by-step explanation:

Assuming the rate of increase in the cost of tuition fee per year is linear. We would apply the formula for determining the nth term of an arithmetic sequence which is expressed as

Tn = a + (n - 1)d

Where

a represents the first term of the sequence.

d represents the common difference.

n represents the number of terms in the sequence.

From the information given,

a = $20500(amount in 2000)

From 2000 to 2018, the number of terms is 19, hence,

n = 19

T19 = 454120

Therefore,

454120 = 20500 + (19 - 1)d

454120 - 20500 = 18d

18d = 433620

d = 433620/18

d = 24090

Therefore, the equation that can be used to find the tuition y for x years after 2000 is expressed as

y = 20500 + 24090(x - 1)

To to estimate the tuition at this college in 2020, the number of terms between 2000 and 2020 is 21, hence

x = 21

y = 20500 + 24090(21 - 1)

y = 20500 + 481800

y = $502300

8 0
3 years ago
Wanda has 8 bananas, 20 oranges, and 12 apples. She wants to put an equal amount of each type of fruit into baskets. What is the
joja [24]

Hey!

---------------------------------------------

Solution:

Find the Highest Common Factor of 8, 12, and 20.

Highest Common Factor = 4

Divide.

8 / 4 = 2

12 / 4 = 3

20 / 4 = 5

4 symbolizes the amount of baskets there are.

---------------------------------------------

Answer:

2 banana's per basket.

3 apple's per basket.

5 orange's per basket.

---------------------------------------------

There is no possible way that there can be the same amount of fruit in each basket.

---------------------------------------------

Hope This Helped! Good Luck!

5 0
3 years ago
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