$3x^{2} - 4xy + 2y { }^{2} - 1 \\ 3 \times ( - 3) { }^{2} - 4 \times ( - 3) \times 5 + 2 \times 5 {}^{2} - 1 \\ (3 \times 9) - ( - 60) + 50 - 1 \\ 27 + 60 + 50 - 1 \\ 165$

8 0

10 months ago

Read 2 more answers

-3 + { 1 – 3[20 + 2(-6 – 7)]}

mart [117]

-73 i think it is i might be wrong

7 0

3 years ago

15÷276 i need to know for math homework its kinda hard to do

Stells [14]

Answer:

0.0543

(i am not fully sure)

5 0

2 years ago

A dolphin was swimming 28 meters below the oceans surface.it changed its depth to avoid a predator and ended up 21 meters below

Harman [31]

Answer:

Step-by-step explanation:

if you go from 28 to 21 you see there is a difference of 7 and sense the number is a smaller number now we know the dolphin went up more towards the surface there for there is a change of positive 7

28-21=7

6 0

2 years ago