8x + 7y = -15 (1st)
-7x - 9y = -7 (2nd)
multiply (1st) by 7 and (2nd) by 8
56x + 49y = -105 (multiply 7)
-56x - 72y = -56 (multiply 8)
--------------------------------------------add
-23y = -161
y = 7
8x + 7y = -15
8x + 7(7) = -15
8x + 49 = -15
8x = -64
x = -8
answer
x = -8 and y = 7
Answer:
0.3333
Step-by-step explanation
it might be the answer. hope it helped :)
Answer:
use this formula
Step-by-step explanation:
Answer:
-17.3
Step-by-step explanation:
Evaluate 5 x + x/2 - 29.4 where x = 11/5:
5 x + x/2 - 29.4 = 5×11/5 - 29.4 + 1/2×11/5
Hint: | Express 5×11/5 as a single fraction.
5×11/5 = (5×11)/5:
(5×11)/5 - 29.4 + (11/5)/2
Hint: | Express (11/5)/2 as a single fraction.
(11/5)/2 = 11/(2×5):
(5×11)/5 - 29.4 + 11/(2×5)
Hint: | Cancel common terms in the numerator and denominator of (5×11)/5.
(5×11)/5 = 5/5×11 = 11:
11 - 29.4 + 11/(2×5)
Hint: | Multiply 2 and 5 together.
2×5 = 10:
11 - 29.4 + 11/10
Hint: | Approximate 11/10.
11/10≈1.1:
11 - 29.4 + 1.1
Hint: | Evaluate 11 + 1.1 using long addition.
| 1 | 1. | 0
+ | | 1. | 1
| 1 | 2. | 1:
12.1 - 29.4
Hint: | Factor out a negative sign in 12.1 - 29.4 in order to subtract.
12.1 - 29.4 = -(29.4 - 12.1):
-(29.4 - 12.1)
Hint: | Subtract 12.1` from 29.4`.
| 2 | 9. | 4
- | 1 | 2. | 1
| 1 | 7. | 3:
Answer: -17.3
Answer:
Look Down
Step-by-step explanation:
Length: 10 Width: 8
Length: 12 Width:6
Length: 4 Width: 14
