Eliminate the y in the following system of equations. What is the result when you add the two equations?
2 answers:
Step-by-step explanation:
To eliminate y we multiply first equation by 4 then add it to the second equation :
- 4 × (x+y)=2 ➡ 4x + 4y = 8
- 4x + 4y + 3x -4y = 8 + 27 ➡7x = 35 ➡x = 5
- Replace x with the value we found to calculate the value of y : x +y = 2➡5+y = 2 ➡y = -3
Answer:
Step-by-step explanation:
4x=29
X=29/4
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Answer:
3600
Step-by-step explanation:
multiply all of the choices
10x15x6x4
Answer:
<h3>#7</h3>
(a)
<u>Sample space:</u>
- 1*1, 1*2, 1*3, 1*4,
- 2*1, 2*2, 2*3, 2*4,
- 3*1, 3*2, 3*3, 3*4,
- 4*1, 4*2, 4*3, 4*4
Total 16 outcomes
(b)
- (i) P(even) = 12/16 = 3/4
- (ii) P(3x) = 7/16
- (iii) P(perfect square) = 4/16 = 1/4
<h3>#8</h3>
(a) <u>Sample space:</u>
- 1T, 1H, 2T, 2H, 3T, 3H, 4T, 4H
Total 8 outcomes
(b)
(i) 1T, 3T
(ii) 1H, 4H
- P(H and square) = 2/8 = 1/4
(iii) 1H, 2H, 3H, 4H
