Answer:
case 1
3x-7y=9
-4x+5y=1
using a graph tool
the solution is the point (-4,-3)------------------> one solution
case 2
y=6x-2
y=6x-4
two parallel lines
the system has no solution---------------> zero solution
case 3
-5x+y=10
-25x+5y=50
is the same line----------------> infinite solutions
Answer:
work is shown and pictured
B.) $240
C.) 286
Answer:
286
Step-by-step explanation:
Given : Myra asked Annabelle to buy her some perfume while she was in France. Annabelle paid 200 euros for it. Myra wants to pay Annabelle back in U.S. dollars.
To Find: If the foreign exchange rate between the U.S. dollar and the euro is 1:0.7, how much should Myra pay Annabelle?
Solution:
Since Annabelle paid 200 euros
And Myra wants to pay Annabelle back in U.S. dollars.
Let Myra paid amount to Annabelle in U.S. dollar be x
We are also given that the U.S. dollar and the euro is 1:0.7
⇒
⇒
⇒
⇒
⇒285.7≈286
Thus Myra should pay $286 to Annabelle
Answer:
C.
$286
Step-by-step explanation:
Plzz visit my profile and help me with my questions.
Brand B: $1.47 for 12 ounces
Brand C: $1.68 for 14 ounces
Brand D: $1.84 for 16 ounces
By using proportions, it is found that the better buy would be d. Brand D: $1.84 for 16 ounces.
A proportion is defined as the fraction of a total amount.
In the given problem, the better buy will be given by the lowest ratio of price to ounces.
Hence:
1.25/10 = 0.125
1.47/12 = 0.1225
1.68/14 = 0.12
1.84/16 = 0.115
Hence brand D is the better buy.
More can be learned about proportions;
#SPJ2
a. True
b. False
$1
-$1
$10
Answer: $1
Step-by-step explanation: (10 x 10) / 100 = 1