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algol13
3 years ago
14

Given that

Mathematics
2 answers:
qwelly [4]3 years ago
6 0

Answer:

x = 4

Step-by-step explanation:

Given that

8 x − 7 y  =  11

Find  x  when  y  =  3

8x - 7(3) = 11

8x - 21 = 11

8x = 32

x = 4

BartSMP [9]3 years ago
5 0

Answer:

x = 4

Step-by-step explanation:

8x - 7y = 11, y = 3 so replace y in the equation with 3

8x - 7(3) = 11

8x - 21 = 11

add 21 to both sides

8x - 21 + 21 = 11 + 21

8x = 32

divide by 8

8x/8 = 32/8

x = 4

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Solve the equation<br><br> - 9x – 2y=-12<br> 2x+5y=-11<br><br> X=<br> Y=
inysia [295]

Answer:x=2, y=3

Step-by-step explanation:

solving this equation simultaneously

-9x - 2y=-12.............(1)

2x + 5y=-11.. ...........(2)

Using elimination method

Multiply equation 2 by 2 and equation 1 by 5

-45x -10y= -60...........(3)

4x + 10y=-22...............(4)

Subtracting equation 2 from 1

-41x + 0=-82

41x=82

x=82/41

X=2

To find y put x in equation 1

-9x - 2y= -12

-9(2)-2y=-12

-18-2y=-12

-2y=-12+18

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3 0
4 years ago
If dy/dx = x2 + 4, what is the value of y?
Nezavi [6.7K]
1) Given dy / dx = x^2 + 4 = y is the function whose derivative is x^2 + 4.

2) y = x^3 / 3 + 4x + constant

Prove d y / dx = 3x^2 / 3 + 4 + 0 = x^2 + 4

Answer: x^3 / 3 + 4x + C
4 0
4 years ago
ANSWER PLZ!!! NEED HELP! <br> 57,632 x 233
Fantom [35]

Answer: The answer is: 13,428,256. Hope this helps!!


Step-by-step explanation:


3 0
3 years ago
Read 2 more answers
Plz help I need these done ASAP
Olegator [25]

Answer: a > 4

<u>Step-by-step explanation:</u>

-5 + a > -1

<u>+5      </u>    <u>+5 </u>

       a > 4

Graph:    4 o-----------→

Interval Notation: (4, ∞)

7 0
3 years ago
Read 2 more answers
PQ is a diameter of a circle with centre If angle PQR=55 ,SPR=25 and angle PQM=50
tigry1 [53]

Answer:

m∠QPR = 35°         m∠QPM =40°       m∠PRS = 30°

Step-by-step explanation:

ΔPRQ is a right triangle with right angle at R.  So m∠QPR = 90 - 55 = 35

ΔQPM is a right triangle with right angle at M.  So m∠QPM = 90 - 40 = 40

Arc RQ = 2(35) = 70 and arc SR = 2(25) = 50.  

So arc PS = 180 - (arc RQ + arc SR) = 180 - (70 + 50) = 180 - 120 = 60

Now arc PS is the intercepted arc for ∠PRS.  

Therefore, m∠PRS = 60/2 = 30

I used the fact that an inscribed angle has a measure 1/2 the measure of the intercepted arc several times.  Also, I used the fact that the acute angles of a right triangle are complementary.  And, finally I used the fact that an inscribed angle in a semicircle is a right angle.

I hope this helped.

5 0
3 years ago
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