Answer:
A, C and F
Step-by-step explanation:
According to exponent laws:

Therefore F needs to be checked
this can further be simplified into:

we square the denominator and numerator
therefore C should be checked
if we expand it will also look like :

so A should be checked
Answer:
41°
Step-by-step explanation:
Supplementary angles are angles that has their sum total of angles as 180°.
If two angles ∠x and ∠ y are supplementary, this means
∠x+∠y = 180° ... (1)
Since ∠y = 139°, to get ∠x, we will substitute the value of ∠y in equation 1 to have;
∠x + 139° = 180°
∠x = 180°-139°
∠x = 41°
Therefore the measure of ∠x is 41°
Answer:
The combined mean can be calculated by plugging in our numbers into the formula given: [(57*82)+(23*63)/(57+23)]=76.5
Donavin would need 383 protective sheets
STEP BY STEP
If each sheet can hold 15 cards you would take 5,734 divided by 15 which gets you 382.26666
You would round up so all the cards have sheets