Answer:
cos 23 = x/7.8
Step-by-step explanation:
20=x/3-8
28=3x
3x/3 = 28/3
X= 28/3
Answer:-24
Step-by-step explanation:
You multiply your numbers without the - or the +
You check ehich number is bigger and you use it symbol for the answer
Example: 3x8= 24
-8 is bigger than 3 so you use it symbol
= -24
Answer:
While x = -7 and y = 4, x² - 3xy = 133.
Step-by-step explanation:
x² - 3xy
Substitute variables.
(-7)² - 3(-7)(4)
Square -7 remembering that (-x)² = x².
49 - 3(-7)(4)
Multiply -7 and 4.
49 - 3(-28)
Multiply -3 and -28.
49 + 84
Add 49 and 84.
133
15x - 10 where x is equal to the number of weeks would respresent the situation above. This is because he gains 15 cards every week and gave ten cards to James once.
If it has only been one week, the expression will be 15 - 10 because 15 × 1 = 15.
I hope this helps!
