4a^2+7ab-b^2
Step-by-step explanation:
Add the first two equations together:
3a^2-ab-2b^2
+ 2a^2+5ab-3b^2
---------------------------
5a^2+4ab-5b^2
Subtract that answer from the remaining trinomial:
5a^2+4ab-5b^2
- a^2-3ab-4b^2
--------------------------
4a^2+7ab-b^2
Answer:
A: Rotate 90 degrees counterclockwise
Step-by-step explanation:
Its the only one that makes sense for where the shape is now it only moved one quadrant
Answer:
No
Step-by-step explanation:
The total number of trains is 287 + 54 + 17 + 5 = 363.
Of these, the number of trains that arrived no more than 10 minutes late is 287 + 54 = 341.
The proportion is p = 341/363 = 0.94.
94% of the trains arrived no more than 10 minutes late, so the company did not meet its target.
Answer:
x = 25°
Step-by-step explanation:
The 2 angles are vertical angles and are congruent , then
2x + 100 = 150 ( subtract 100 from both sides )
2x = 50 ( divide both sides by 2 )
x = 25°
Answer:
Rita's recipe
Step-by-step explanation:
Use proportions and find it out. [Use s as sugar and c as cookies]
Rita's - 2s = 2c. would be 1 cup of sugar per dozen cookies.
Joahn's - 2s = 3c. would be 2/3 cup of sugar per batch of cookies
