Answer:
third option
Step-by-step explanation:
Given
3 ![\left[\begin{array}{ccc}-2&5\\1&0\\\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-2%265%5C%5C1%260%5C%5C%5Cend%7Barray%7D%5Cright%5D)
Multiply each element in the matrix by 3
= ![\left[\begin{array}{ccc}3(-2)&3(5)\\3(1)&3(0)\\\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%28-2%29%263%285%29%5C%5C3%281%29%263%280%29%5C%5C%5Cend%7Barray%7D%5Cright%5D)
=
Given expression -
![2y - 3 \leqslant - 10 \\](https://tex.z-dn.net/?f=2y%20-%203%20%5Cleqslant%20-%2010%20%5C%5C%20)
Adding 3 to both sides ,
![2y - 3 + 3 \leqslant - 10 + 3 \\ 2y \: \leqslant \: - 7](https://tex.z-dn.net/?f=2y%20-%203%20%2B%203%20%5Cleqslant%20-%2010%20%2B%203%20%5C%5C%202y%20%5C%3A%20%5Cleqslant%20%5C%3A%20-%207)
Dividing by 2 on both sides ,
Answer:
440
Step-by-step explanation:
1.5 hours he 90 minutes
660/ 90=7.333
7.333*60 (which is how many minutes in an hour = 440 miles
Answer:
C. x=4,y=9
Step-by-step explanation:
The given information show that
x+11y=103 (1)
9x+10y=126 (2)
Isolate x from (1)
x=103-11y
Substitute x=103-11y into (2)
9(103-11y)+10y=126
927-99y+10y=126
-89y=-801
y=9
So x=103-11x9=4
Answer:
CBA =~ DEA
Step-by-step explanation:
They are both right angles.
How do we know?
They both have the square.
Right angles can ONLY be 90 degrees.