The 1st stage: x, the 2nd stage: y.
x + y = 152
x = y + 28
y + 28 + y = 152
2 y = 152 - 28
2 y = 124
y = 124 : 2 = 62
x = 62 + 28 = 90
Answer: the first stage burns 90 seconds and the second burns 62 seconds.
Answer:
156 sq in
Step-by-step explanation:
If you have a rectangle measuring 13 inches by 12 inches, you will consider the side with 13 inches as the length of the rectangle and the one with 12 inches as the width of the rectangle.
The area of a rectangle is obtained by multiplying the length by the width... so, you'll get:
A = 13 in x 12 in = 156 square inches
Answer:
I only know the first 1 sorry but here is the answer y=-3/4+2
Step-by-step explanation:
3x+4y=8
-3x -3x subtract -3x to get on the right side
4y=-3x+8
/4 /4 /4 divide by 4 on both sides
y=-3/4x+2 since 4 can't go into 3 you leave as a fraction -3/4x
UPDATE: I found the answer to number 4
The answer is y=-11/7x+8
-11x-7y=-56
+11x +11x Add 11x
-7y=11x-56
/-7 /-7 /-7 Divide by -7 on both sides
y=-11/7x+8 Since -7 can't go into 11 you leave as a fraction -11/7x
ANOTHER UPDATE: I found the answer to number 7
-14x+y=7
+14x +14x Add 14x to both sides
y=14x+7 Since y doesn't have a number your answer is as shown
Answer:
The determinant is 15.
Step-by-step explanation:
You need to calculate the determinant of the given matrix.
1. Subtract column 3 multiplied by 3 from column 1 (C1=C1−(3)C3):
![\left[\begin{array}{ccc}-25&-23&9\\0&3&1\\-5&5&3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-25%26-23%269%5C%5C0%263%261%5C%5C-5%265%263%5Cend%7Barray%7D%5Cright%5D)
2. Subtract column 3 multiplied by 3 from column 2 (C2=C2−(3)C3):
![\left[\begin{array}{ccc}-25&-23&9\\0&0&1\\-5&-4&3\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-25%26-23%269%5C%5C0%260%261%5C%5C-5%26-4%263%5Cend%7Barray%7D%5Cright%5D)
3. Expand along the row 2: (See attached picture).
We get that the answer is 15. The determinant is 15.
Answer:
20:10 10 hours
Step-by-step explanation:
10:5 * 2 = 20:10 or 10:5 / 5 : 2:1 * 20 = 20:10
