Answer:
C. -7 or C. Negative seven
Answer:
- D. Neither
- x- intercept: (-13/6, 0), y- intercept: (0, 13)
- (-1, 3)
Step-by-step explanation:
#1
<u>Substitute pairs of solutions and verify</u>
(1, 7)
(2, -7)
- -7 = -2*2 - 5
- -7 = -11
- Wrong
Correct choice is <u>D. Neither</u>
#2
<u>x- intercept: y = 0</u>
- 6x + 13 = 0
- 6x = -13
- x = -13/6
- (-13/6, 0)
<u>y- intercept: x = 0</u>
- y = 6*0 + 13
- y = 13
- (0, 13)
#3
<u>x = -1 ⇒ find y:</u>
- y - 3 = 2(-1 + 1)
- y = 3
- (-1, 3)
Answer: 65
Step-by-step explanation:
Since the mean mark of the 9 students is 50. Their total marks will be:
= 9 × 50
= 450
Since the marks obtained by 8 students are given, we add the marks together and this will be:
= 60+40+50+30+80+40+45+40
= 385
The score of the 9th student will be:
= 450 - 385
= 65
Answer:
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Step-by-step explanation:
Answer:
19
Step-by-step explanation:
<u>Step 1: Solve</u>
13 - (-6)
13 + 6
<em>19</em>
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Answer: 19
