Answer:
x = 50
Step-by-step explanation:
Since the two angles are supplementary, add them together and set them equal to 180 degrees
2x + 2x - 20 = 180 Combine like terms
4x - 20 = 180
+ 20 + 20 Add 20 to both sides
4x = 200 Divide both sides by 4
x = 50
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Answer:
1.5$
Step-by-step explanation:
10 cupcakes =15$
so, 1 cupcake = 15/10
i.e. 1.5
.: 1cupcake cost = 1.5$
Answer:
The first equation can be multiplied by 3 and the second equation by 2.
Step-by-step explanation:
Given
Required
How to eliminate x
To eliminate x using addition, we have to do the following;
1. Take the coefficient of x in equation 1; Coefficient = 2
2. Take the coefficient of x in equation 2; Coefficient = -3
3. Multiply equation 1 by 3
4. Multiply equation 2 by 2
5. Add both resulting equations
+
Notice that x has been eliminated;
Two matrices may be added or subtracted only if they have the same dimension; that is, they must have the same number of rows and columns. Addition or subtraction is accomplished by adding or subtracting corresponding elements. For example, consider matrix A and matrix B. A =
Answer:
24
5.49
Step-by-step explanation:
