9514 1404 393
Answer:
10
Step-by-step explanation:
For c correct answers and 5 incorrect answers, James's score is ...
4c -2(5) = 30
4c = 40 . . . . . . add 10
c = 10 . . . . . . . . divide by 4
James gave 10 correct answers.
False. When a quadrilateral has two sets of parallel sides ,like I drew below, all four corners form right angles.
Answer:
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45
Step-by-step explanation:
Answer:
2 or -2
Step-by-step explanation:
If x² - 8x = -12
Step 1
We find x by solving
x² - 8x = -12
We equate to zero
x² - 8x + 12 = 0
We factorise
x² - 6x - 2x + 12 = 0
x(x - 6) -2(x - 6) = 0
(x - 6) (x - 2) = 0
x - 6 = 0, x = 6
x - 2 = 0, x = 2
x = 6 or 2
Step 2
What is x - 4?
When x = 6
= 6 - 4 = 2
When x = 2
= 2 - 4 = -2
Therefore, x - 4 = 2 or -2
Answer:
3. ???? (3 but that's incorrect)
4. 75 D
Step-by-step explanation:
Use PEMDAS ()^x/+-