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natita [175]
2 years ago
12

Solve for x, 8+2/7x=12?Help?

Mathematics
2 answers:
Sophie [7]2 years ago
5 0

Answer:

Exact form X=1/14

Decimal form x=0.0714285

Minchanka [31]2 years ago
4 0

Answer:

X= 14

Step-by-step explanation:

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Solve the simultaneous equation 2p - 3q = 4, 3p + 2q = 9. <br>b. if 223= 87 find x<br>​
wolverine [178]

Answer:

Step-by-step explanation:

Given the simultaneous equation 2p - 3q = 4 and 3p + 2q = 9, to get the value of p and q we will use elimination method.

2p - 3q = 4 ...................... 1 * 3

3p + 2q = 9 ..................... 2 * 2

Multiplying equation 1 by 3 and 3 by 2:

6p - 9q = 12

6p + 4q = 18

Subtracting both equation

-9q-4q = 12-18

-13q = -6

q = -6/-13

q = 6/13

Substituting q = 6/13 into equation 2

2p - 3(6/13) = 4

2p - 18/13 = 4

2p = 4+18/13

2p = (52+18)/13

2p = 70/13

p = 70/26

p = 35/13

<em>Hence p = 35/13 and q = 6/13</em>

<em></em>

<em>b) </em>If if 223ₓ = 87 find x

Using the number base system and converting 223ₓ  to base 2 will give us;

223ₓ = 2*x² + 2*x¹ + 3*x⁰

223ₓ  = 2x²+2x+3

​

Substituting back into the equation, 2x²+2x+3 = 87

2x²+2x+3-87 = 0

2x²+2x-84 = 0

x²+x-42 = 0

On factorizing:

(x²+6x)-(7x-42) = 0

x(x+6)-7(x+6) = 0

(x+6)(x-7) = 0

x+6 = 0 and x-7 = 0

x = -6 and 7

<em>Hence the value of x is 7 (neglecting the negative value)</em>

5 0
3 years ago
What is the best estimate of the mean age of all the people in the tour group?
marissa [1.9K]
Mean = (19 +27 +25+21+44+22+45+34)/8 = 29.625≈30 years

Answer is 30.
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2 years ago
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A Confession to my Friends
artcher [175]

Aww, that's sweet, but why don't you just text them?

7 0
3 years ago
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Please help me solve this correct answer gets brainlist
julia-pushkina [17]

Answer:

hyp²= opp² + adj²

hyp²= 12² +4²

hyp²= 144+16

hyp²=160

hyp=√160

hyp= 4√10

8 0
2 years ago
Read 2 more answers
5=g/8 PLRASE HELP Me
pantera1 [17]

G= 40

5x8=40

40/8=5

All you have to do is inverse operations so instead of dividing you multiply your 5 and 8 to get 40 and then check your work.

4 0
2 years ago
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