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astraxan [27]
3 years ago
14

If x + sin^2 theta + cos^2 theta = 4, then what is the value of x?

Mathematics
1 answer:
Ray Of Light [21]3 years ago
4 0

Answer:

x = 3

Step-by-step explanation:

x + sin^2  \theta + cos^2  \theta = 4 \\ x + 1 = 4 \\ ( \because \: sin^2  \theta + cos^2  \theta = 1) \\ x = 4 - 1 \\  x = 3

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Fina bought a DVD player for $58.97 and a set of DVDs for $24.98. How much did Fina spend in all?
Softa [21]
Fina spent $83.65 in all.
4 0
2 years ago
Solve the system of equations by substitution 3x+y=9z
poizon [28]

Answer:

x = 1.27

y = 5.18

Step-by-step explanation:

to solve this system of  equation by simultaneous equation we say that let

3x+y=9.............................. equation 1

-5x+2y=4 .......................... equation 2

from equation 1

3x+y=9.............................. equation 1

y = 9 -3x.............................. equation 3

substitute the value of y = 9 -3x into equation 2

-5x+2y=4 .......................... equation 2

-5x + 2( 9 -3x) = 4

-5x + 18 - 6x = 4

collect the like terms

18 - 4 = 6x + 5x

14 = 11x

divide both side by 11

14/11 = 11x/11

x = 14/11

x = 1.27

put the value of x = 1.27 into  equation 3

y = 9 -3x.............................. equation 3

y = 9 - 3( 1.27)

y = 9 - 3.82

y = 5.18

<em>to check if you are correct put the value of x and y into either equation 1 or equation 2.</em>

<em>3x+y=9.............................. equation 1</em>

<em>3( 1.27) + 5.18 = 9</em>

<em>3.81 + 5.18 = 9</em>

<em>9 = 9</em>

3 0
3 years ago
Bonita said that the product of 56 × 123 is 73.<br><br> How can you tell that her answer is wrong?
Doss [256]
She may have used a wrong operation to get this answer. 73 is not the correct answer, and you can prove it using a calculator or longhand. The correct answer is 6888.
4 0
3 years ago
Read 2 more answers
What is the answer to -t+9-4t=59?
kkurt [141]

Answer:

-10

Step-by-step explanation:

combine like terms -5x+9=59 subtract 9 from both side and get -5x=50 so x=-10

3 0
3 years ago
Read 2 more answers
Is (-3,0)a solution to the equation 2x+6y=-6?
sineoko [7]

Answer:

Yes

Step-by-step explanation:

 x , y

(-3 , 0)

plug in the numbers

2(-3) + 6(0) = -6    

-6 = -6

4 0
3 years ago
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