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3 years ago

1/2 sin x sin (2x) + Cos 3 x

Mathematics

1 answer:

dsp733 years ago

7 0

Answer:

1.047734151

Step-by-step explanation:

Type into calculator

1/2sin(2x)+cos(3x)

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Follow the directions to solve the system of equations by elimination. 8x + 7y = 39 4x – 14y = –68 Multiply the first equation t

g100num [7]

Answer:

x=0.5 and y=5

Step-by-step explanation:

8x+7y=39...eqn(1)×-14

4x-14y=-68...eqn(2)×7

we now have,

-112x-98y=-546

-(28x-98y=-476)

-140x÷-140 =-70÷-140

x=0.5

to solve for y, we substitute (x=0.5) into eqn (1) or eqn 2 which ever you want...

so I'm using eqn 1.

8x+7y=39

8(0.5)+7y=39

7y=39-4

7y÷7=35÷7

y=5

therefore, x=0.5, y=5

proof: substitute both x and y values to get you the same answer as the original solutions in both equations.

we have,

8(0.5)+7(5)=39

4(0.5)-14(5)=-68

4 0

4 years ago

Read 2 more answers

The high school baseball team won the championship this season. The total runs scored for each of their 15 game are listed below

Keith_Richards [23]

Answer:

what data

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Absolute value of |x|-2=5

Stells [14]

Answer:

x = ± 7

|-7|-2=5

|7|-2=5

± means positive or negative

Step-by-step explanation:

|x|-2=5

Get x by itself by adding 2 to both sides.

x - 2 + 2= 5 + 2

-2 + 2 cancels out

x = 5 + 2

x = 7

Absolute value is how far a number is from 0.

x can be either positive or negative.

7 0

3 years ago

Four friends ordered two pizzas the cost of each pizza is $13.80 about how much will it cost for both pizzas

skad [1K]

13.80 x 2= 27.60

1 pizza equals 13.80 so two pizzas will be twice that money amount. Both pizzas will cost $27.60.

I hope this helped

8 0

4 years ago

Read 2 more answers

Decide whether or not each equation represents a proportional relationship. A.The remaining length (L) of 120-inch rope after x

bulgar [2K]

Answer and Step-by-step explanation: An equation represents proportional relationship when dividing the quantities of the equation results in a quotient that is always the same. For example, in general:

Equation: y = mx

$\frac{y}{x}$ = m

m is a constant value, which means is the same.

A. Equation: 120 - x = L

Equation from alternative A is NOT proportional since the division of the quantities doesn't result in a constant.

B. Equation: 1.08p = t

Dividing total cost per item's price, will always give the sales tax, which is constant. So, this equation IS proportional.

$\frac{t}{p}=1.08$

C. Equation: $x=\frac{m}{4}$

This equation is proportional because dividing marbles per how much each sister gets, always gives the number of sisters:

$\frac{m}{x}=4$

D. Equation: $V=12s^{2}$

This equation is NOT proportional because side length is squared, so it is not constant linearly.

8 0

3 years ago