To the nearest whole number would be 7
-4x - 5y = 7
3x + 5y = -14
You can add these two equations together straightaway since the y-terms have opposite coefficients.
-4x - 5y = 7
3x + 5y = -14
+___________
-x - 0 = -7
-x = -7
x = 7
Substitute 7 for x into either of the original equations and solve algebraically to find y.
3x + 5y = -14
3(7) + 5y = -14
21 + 5y = -14
21 = -14 - 5y
35 = -5y
-7 = y
Finally, check work by substituting both x- and y-values into both original equations.
-4x - 5y = 7
-4(7) - 5(-7) = 7
-28 + 35 = 7
7 = 7
3x + 5y = -14
3(7) + 5(-7) = -14
21 - 35 = -14
-14 = -14
Answer:
x = 7 and y = -7; (7, -7).
Answer:
A rectangular prism has 12 edges.
Answer:
22.2m
Step-by-step explanation:
1 roll to 12 gifts
one gifts uses 1,85m of ribbon
1,85m is the length
12 × 1.85 = 22.2m
If you mean something like 4^3 * 4^14 you have to obey two rules.
1. The base number must be the same for both numbers making up the product.
2. The powers must be added.
In this case 1 and 2 both can be obeyed.
4^3 * 4^14 = 4^(3 + 14) = 4^17
