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Dmitry [639]
3 years ago
15

Please help me

Mathematics
2 answers:
Leona [35]3 years ago
8 0

Answer:

<h3><em><u>y</u></em><em><u>=</u></em><em><u>0</u></em><em><u>.</u></em><em><u>5</u></em><em><u>c</u></em><em><u>o</u></em><em><u>s</u></em><em><u>(</u></em><em><u>2</u></em><em><u>(</u></em><em><u>x-pi</u></em><em><u>/</u></em><em><u>2</u></em><em><u>)</u></em><em><u>)</u></em><em><u>+</u></em><em><u>2</u></em><em><u> </u></em><em><u>y</u></em><em><u>=</u></em><em><u>0</u></em><em><u>.</u></em><em><u>5</u></em><em><u>c</u></em><em><u>o</u></em><em><u>s</u></em><em><u>(</u></em><em><u>4</u></em><em><u>(</u></em><em><u>x</u></em><em><u>+</u></em><em><u>pi/</u></em><em><u>2</u></em><em><u>)</u></em><em><u>)</u></em><em><u> </u></em><em><u>-</u></em><em><u>2</u></em></h3>

<h3><em><u>I</u></em><em><u> </u></em><em><u>think</u></em><em><u> </u></em><em><u>that's</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>answer</u></em><em><u>.</u></em><em><u> </u></em></h3>

Dvinal [7]3 years ago
6 0

y=0.5cos(2(x-pi))-2 - I Think Usure

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Factor 10b-25b^3 please answer asap
fredd [130]

Answer:

5b(2 - 5b²)

Step-by-step explanation:

Simply take out GCFs to factor out the expression:

Step 1: Factor out GCF of 5

5(2b - 5b³)

Step 2: Factor out GCF of <em>b</em>

5b(2 - 5b²)

We can't factor the quadratic any further so that is our final answer.

8 0
3 years ago
Use the substitution and to rewrite the equations in the system in terms of the variables and . Solve the system in terms of u a
Tatiana [17]

Answer:

x = -1 and y = 1/2

Step-by-step explanation:

Let u = 1/x, and v = 1/y

Then the pair of equations

-3/x + 4/y = 11

1/x - 2/y = -5

Can be written as

-3u + 4v = 11 .................................(1)

u - 2v = -5......................................(2)

From (2)

u = 2v - 5 .......................................(3)

Substituting (3) into (1)

-3(2v - 5) + 4v = 11

-6v + 15 + 4v = 11

-6v + 4v = 11 - 15

-2v = -4

v = 4/2 = 2

Substituting this value of v in (3)

u = 2v - 5

u = 2(2) - 5

= 4 - 5

= -1

That is

u = -1, v = 2

Since u = 1/x, and v = 1/y, we have

1/x = -1

=> x = -1

And

1/y = 2

=> y = 1/2

Therefore

x = -1 and y = 1/2

4 0
3 years ago
The diameters of ball bearings are distributed normally. The mean diameter is 107 millimeters and the population standard deviat
tensa zangetsu [6.8K]

Answer:

0.6710

Step-by-step explanation:

The diameters of ball bearings are distributed normally. The mean diameter is 107 millimeters and the population standard deviation is 5 millimeters.

Find the probability that the diameter of a selected bearing is between 104 and 115 millimeters. Round your answer to four decimal places.

We solve using z score formula

z = (x-μ)/σ, where

x is the raw score

μ is the population mean = 107 mm

σ is the population standard deviation = 5 mm

For x = 104 mm

z = 104 - 107/5

z = -0.6

Probability value from Z-Table:

P(x = 104) = 0.27425

For x = 115 mm

z = 115 - 107/5

z = 1.6

Probability value from Z-Table:

P(x = 115) = 0.9452

The probability that the diameter of a selected bearing is between 104 and 115 millimeters is calculated as:

P(x = 115) - P(x = 104)

0.9452 - 0.27425

= 0.67095

Approximately = 0.6710

8 0
3 years ago
Please Help Me On These Math Questions!!!!! Solve Each System By Elimination
nekit [7.7K]
11) -x + y = -1 ; 2x - y = 0
y = -1 + x ; 2x - (-1+x) = 0 ⇒ 2x + 1 - x = 0 ⇒x = -1 
y = -1 + (-1) ⇒ y = -2

12) -2x + y = -20 ; 2x + y = 48
y = -20 + 2x ; 2x + (-20 + 2x) = 48 ⇒ 2x -20 + 2x = 48 ⇒ 4x = 48 + 20
                      4x = 68 ⇒ x = 68/4 ⇒ x = 17
y = -20 + 2(17) ⇒ y = -20 + 34 ⇒ y = 14

13) 3x -y = -2 ; -2x + y = 3
y = 3 + 2x ; 3x - (3 + 2x) = -2 ⇒ 3x - 3 - 2x = -2 ⇒ x = -2 + 3 ⇒ x = 1
y = 3 + 2(1) ⇒ y = 3 + 2 ⇒ y = 5

14) x - y = 4 ; x - 2y = 10
x = 4 + y ; (4 + y) - 2y = 10 ⇒ 4 + y - 2y = 10 ⇒ 4 - y = 10 
                  ⇒ -y = 10 - 4 ⇒ -y = 6 ⇒  y = -6
x = 4 + (-6) ⇒ x = 4 - 6 ⇒ x = -2

15) x + 2y = 5 ; 3x + 2y = 17
x = 5 - 2y ; 3(5-2y) + 2y = 17 ⇒ 15 - 6y + 2y = 17 ⇒ -4y = 17 - 15
               ⇒ -4y = 2 ⇒ y = -2/4 ⇒ y = -1/2
x = 5 - 2(-1/2) ⇒ x = 5 + 2/2 ⇒ x = 5 + 1 ⇒ x = 6 
5 0
3 years ago
Read 2 more answers
Which is a correct first step for solving this equation? X+7=2x+5-4x
shepuryov [24]

Step-by-step explanation:

you collect like terms from both sides that is, the variables on one side and the constants on the other side

8 0
3 years ago
Read 2 more answers
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