Answer:
B
Step-by-step explanation:
We require 2 equations in 2 variables
let x be the number of salads sold and y the number of drinks sold, then the 2 equations are
x + y = 209 → (1)
6.5x + 2y = 836.5 → (2)
Multiplying (1) by - 2 and adding to (2) will eliminate y
- 2x - 2y = - 418 → (3)
Add (2) and (3) term by term
(6.5x - 2x) + (2y - 2y) = (836.5 - 418) ← simplify
4.5x = 418.5 ( divide both sides by 4.5 )
x = 93
The number of salads sold was 93
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Answer:
Step-by-step explanation:
Study the steps used to solve the equation.
Given: StartFraction c Over 2 EndFraction minus 5 equals 7
Step 1: StartFraction c Over 2 EndFraction minus 5 plus 5 equals 7 plus 5
Step 2: StartFraction c Over 2 EndFraction plus 0 equals 12
Step 3: StartFraction c Over 2 EndFraction equals 12
Step 4: 2 (StartFraction c Over 2 EndFraction) equals 12 (2)
Step 5: c equals 24
Answer:
We must prove that (c+a)(c+d) = (b+c)(b+d)
- Let us use principles from mathematical induction
- a=bx , b=cx, c=dx
- a+c = b + c
- c +d = b + d
- Such that (a+c)(c+d)=(b+c)(b+d)
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Answer:
Abc is the whole explanation.
