Answer: One DVD is $12 and one book is $1
Step-by-step explanation:
Let the DVD be d and the book be b.
Case 1:
3d + 4b = $40.......(1)
Case 2:
1d + 6b = $18........... (2)
In this equations above, I intend to eliminate variable d, so I'm going to multiply the coefficient of d in (1) to multiply (2)
3 × (1d + 6b = 18)
3d + 18b = 54........ .(3)
Then, subtract (1) from (3)
3d + 18b = 54
- ( 3d + 4b = 40)
3d - 3d + 18b - 4b = 54 - 40
0 + 14b = 14
b = 14/14
b = 1.
Then substitute 1 for b in (2)
1d + 6(1) = 18
d + 6 = 18
d = 18 - 6
d = 12.
(d,b) = (12,1)
Answer:
y=x−3
Step-by-step explanation:
Flip the equation.
4y+7=4x−5
Add -7 to both sides.
4y+7+−7=4x−5+−7
4y=4x−12
Divide both sides by 4.
y=x−3
ik this doesnt make any sense but hope this helps :/
Answer:
The ant
Step-by-step explanation:
We know that the meters traveled is going to be more than the amount of minutes because it is 1.5:1 so that narrows it down to the turtle and the ant.
Now we can just take 150% of each and see if they match up.
150% of 5 is 7.5 so therefore it is not the Turtle which means it must be the ant.
Hope this helped ! !
<3
if it did please consider marking brainliest i would appreciate it greatly :)
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Answer:
9 oz less
Step-by-step explanation:
The difference is 75% of 12 oz, so is ...
0.75 · 12 oz = 9 oz
The regular bottle holds 9 ounces less.
